








	*SMF Tools*

SMF Type 74 Record (Subtype 5) - z/OS 2.1

This table shows the record layout for type 74 SMF records
(RMF - Cache Subsystem Device Activity).

List of other SMF record layouts available.
List of sample SMF reports.

Purpose: Record type 74 has several subtypes.

Subtype 5 — Cache Subsystem Device Activity

One or several records (depending on the number of devices attached to the control unit) are written for each cache subsystem. The header section of each record contains an individual header extension for subtype 5.

Cache control section Contains control information and return codes from interfaces.

Cache device data section Contains cache statistics for each device.

Cache device extension data section This extension applies only to control unit types 3990-03 and 3990-06. It is collected by RMF to provide the same data as in the corresponding CRR record.

Cache control unit status data section Contains cache statistics for the control unit.

RAID Rank/Extent Pool Data section Contains RAID rank statistics for a 2105 device or extent pool statistics for a 2107 device.

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SMF Type 74 Record -- RMF - Cache Subsystem Device Activity
Offset (Dec.)	Offset (Hex)	Name	Length	Format	Description
0	0	SMF74LEN	2	binary	Record length. This field and the next field (total of four bytes) form the RDW (record descriptor word).
2	2	SMF74SEG	2	binary	Segment descriptor (see record length field).
4	4	SMF74FLG	1	binary	System indicator Bit - Meaning When Set 0 New record format 1 Subtypes used 2 Reserved. 3-6 Version indicators 7 System is running in PR/SM mode.
5	5	SMF74RTY	1	binary	Record type 74 (X'4A').
6	6	SMF74TME	4	binary	Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
10	A	SMF74DTE	4	packed	Date when the record was moved into the SMF buffer, in the form 0cyydddF.
14	E	SMF74SID	4	EBCDIC	System identification (from the SMFPRMxx SID parameter).
18	12	SMF74SSI	4	EBCDIC	Subsystem identification (‘RMF’).
22	16	SMF74STY	2	binary	Record subtype.
24	18	SMF74TRN	2	binary	Number of triplets in this record. A triplet is a set of three SMF fields (offset/length/number values) that defines a section of the record. The offset is the offset from the RDW.
26	1A	--	2	binary	Reserved.
28	1C	SMF74PRS	4	binary	Offset to RMF product section from RDW.
32	20	SMF74PRL	2	binary	Length of RMF product section.
34	22	SMF74PRN	2	binary	Number of RMF product sections.
Individual header extension for subtype 5:
36	24	SMF745CO	4	binary	Offset to control section.
40	28	SMF745CL	2	binary	Length of control section.
42	2A	SMF745CN	2	binary	Number of control sections.
44	2C	SMF745DO	4	binary	Offset to cache device data section.
48	30	SMF745DL	2	binary	Length of cache device data section.
50	32	SMF745DN	2	binary	Number of cache device data sections.
52	34	SMF745XO	4	binary	Offset to cache device data section extension.
56	38	SMF745XL	2	binary	Length of cache device data section extension.
58	3A	SMF745XN	2	binary	Number of cache device data section extensions.
60	3C	SMF745SO	4	binary	Offset to cache status data section.
64	40	SMF745SL	2	binary	Length of cache status data section.
66	42	SMF745SN	2	binary	Number of cache status data sections.
68	44	SMF7451O	4	binary	Offset to RAID rank data sections.
72	48	SMF7451L	2	binary	Length of RAID rank data section.
74	4A	SMF7451N	2	binary	Number of RAID rank data sections.
RMF Product Section(Offset from beginning of record: SMF74PRS)
0	0	SMF74MFV	2	packed	RMF version number.
2	2	SMF74PRD	8	EBCDIC	Product name (‘RMF’).
10	A	SMF74IST	4	packed	Time that the RMF measurement interval started, in the form 0hhmmssF, where hh is the hours, mm is the minutes, ss is the seconds, and F is the sign.
14	E	SMF74DAT	4	packed	Date when the RMF measurement interval started, in the form 0cyydddF.
18	12	SMF74INT	4	packed	Duration of the RMF measurement interval, in the form mmsstttF where mm is the minutes, ss is the seconds, ttt is the milliseconds, and F is the sign. (The end of the measurement interval is the sum of the recorded start time and this field.)
22	16	--	2	binary	Reserved.
24	18	SMF74SAM	4	binary	Number of RMF samples.
28	1C	--	2	binary	Reserved.
30	1E	SMF74FLA	2	binary	Flags Bit - Meaning When Set 0 Reserved 1 Samples have been skipped 2 Record was written by RMF Monitor III 3 Interval was synchronized with SMF 4-15 Reserved.
32	20	--	4	binary	Reserved.
36	24	SMF74CYC	4	packed	Sampling cycle length, in the form 000ttttF, where tttt is the milliseconds and F is the sign (taken from CYCLE option). The range of values is 0.050 to 9.999 seconds.
40	28	SMF74MVS	8	EBCDIC	MVS software level (consists of an acronym and the version, release, and modification level - ZVvvrrmm).
48	30	SMF74IML	1	binary	Indicates the type of processor complex on which data measurements were taken. Value - Meaning 3 9672, zSeries 49 31 SMF73PRF 1 binary Processor flags. Bit Meaning When Set 0 The system has expanded storage 1 The processor is enabled for ES connection architecture (ESCA) 2 There is an ES connection director in the configuration 3 System is running in z/Architecture mode 4 At least one zAAP is currently installed 5 At least one zIIP is currently installed 6 Enhanced DAT architecture available 7 Reserved.
50	32	SMF74PTN	1	binary	PR/SM partition number of the partition that wrote this record.
51	33	SMF74SRL	1	binary	SMF record level change number (X’6B’ for z/OS V2R1 RMF). This field enables processing of SMF record level changes in an existing release.
52	34	SMF74IET	8	char	Interval expiration time token. This token can be used to identify other than RMF records that belong to the same interval (if interval was synchronized with SMF).
60	3C	SMF74LGO	8	binary	Offset GMT to local time (STCK format).
68	44	SMF74RAO	4	binary	Offset to reassembly area relative to start of RMF product section.
72	48	SMF74RAL	2	binary	Length of reassembly area. Area consists of a fixed header and a variable number of information blocks. Length depends on the record type/subtype, but is fixed for a specific type/subtype.
74	4A	SMF74RAN	2	binary	Reassembly area indicator. Value - Meaning 0 Record is not broken. 1 Record is broken. Note: This field is used to indicate whether an SMF record is a broken record. Therefore, offset (SMF74RAO) and length (SMF74RAL) are only valid if SMF74RAN = 1. A reassembly area is only present in broken records.
76	4C	SMF74OIL	2	binary	Original interval length as defined in the session or by SMF (in seconds).
78	4E	SMF74SYN	2	binary	SYNC value in seconds.
80	50	SMF74GIE	8	binary	Projected gathering interval end (STCK format) GMT time.
88	58	SMF74XNM	8	EBCDIC	Sysplex name as defined in parmlib member COUPLExx.
96	60	SMF74SNM	8	EBCDIC	System name for current system as defined in parmlib member IEASYSxx SYSNAME parameter.
Reassembly Area(Offset from beginning of record: SMF74PRS + SMF74RAO)
0	0	SMF74RBR	2	binary	Total number of broken records built from the original large record.
2	2	SMF74RSQ	2	binary	Sequence number of this broken record. Every broken record built from the same large record must have a unique sequence number, it is in the range from 1 to SMF74RBR.
4	4	SMF74RIO	4	binary	Offset to first reassembly information block relative to start of reassembly area header.
8	8	SMF74RIL	2	binary	Length of reassembly information block.
10	A	SMF74RIN	2	binary	Number of reassembly information blocks (same value as SMF74TRN in header section).
12	C	--	4	binary	Reserved.
Reassembly Area Information Block(Offset from beginning of record: SMF74PRS + SMF74RAO + SMF74RIO)
0	0	SMF74RNN	2	binary	Total number of sections in the original large record. This field contains information of how many sections of a specific type were contained in the original SMF record. This field is a copy of the number field of the triplet in the original (non broken) record.
2	2	SMF74RPP	2	binary	Position of the first of one or more consecutive sections described by this block as in the original record. Values in the range of 1 to SMF74RNN are valid for correct processing. A value of 0 will skip processing of this information block. This field provides information where the sections that are part of this broken record were placed in the original record before the split took place. The actual number of consecutive sections contained in this record is available from the actual triplet in the header extension.
Subtype 5 — Cache Control Section There is one section per record.(Offset from beginning of record: SMF745CO)
0	0	SMF745CLVL	1	binary	Gatherer level.
1	1	SMF745CMDL	1	binary	Caching subsystem model.
2	2	SMF745CCNT	1	binary	Record sequence number.
3	3	SMF745CUID	1	EBCDIC	Real control unit ID.
4	4	SMF745CSC	1	binary	Status code. Value - Meaning 0 Successful processed. 4 IOS return code SMF745CIOC ¬= 0. 8 IDCSS01 return code SMF745CRTN ¬= 0. 98 SYSTEM or USER ABEND SMF745CEA ¬= 0.
5	5	SMF745CAE	3	binary	ABEND CODE (SDWACMPC): First 12 bits = System completion code. Second 12 bits = User completion code.
8	8	SMF745CRTN	2	binary	IDCSS01 return code. If not zero, record has no device data sections (SMF745DN=0).
10	A	SMF745CIOC	1	binary	IOS return code. If not zero, record has no device data sections (SMF745DN = 0).
11	B	--	1	binary	Reserved.
12	C	SMF745CINT	4	binary	Number of seconds since subsystem statistics last collected.
16	10	SMF745CCMT	28	EBCDIC	Hardware type and model of the control unit.
Subtype 5 — Cache Device Data Section There is one section per device.(Offset from beginning of record: SMF745DO)
0	0	SMF745DVOL	6	EBCDIC	Volume serial of device.
6	6	SMF745DFL4	1	binary	Flags Bit - Meaning When Set 0 4-digit device address. 1-7 Reserved.
7	7	SMF745DCID	1	binary	Real control unit type code.
8	8	SMF745DUNT	3	binary	Unit address for sense command.
11	B	--	1	binary	Reserved.
12	C	SMF745DEVN	2	binary	Device number.
14	E	--	2	binary	Reserved.
16	10	SMF745DFLG	1	binary	Flags Bit - Meaning When Set 0 Subsystem storage not available. 1-3 Reserved. 4-7 Format of data returned: - B’0000’ = 40 bytes sense. - B’1111’ = 44 bytes sense.
17	11	SMF745DVID	1	binary	Device address.
18	12	SMF745DVS1	1	binary	Addressed device status flag # 1: Bit - Meaning When Set 0-1 Device caching status: - B’00’ = Caching activated. - B’01’ = Not used. - B’10’ = Deactivate pending. - B’11’ = Caching deactivated. 2-3 DASD fast write device status: - B’00’ = DFW allowed - B’01’ = DFW not used - B’10’ = DFW deactivate pending - B’11’ = DFW deactivate 4 Primary of duplex pair. 5 Secondary of duplex pair. 6-7 Duplex pair status: - B’00’ = Duplex pair available. - B’01’ = Duplex pair pending. - B’10’ = Failed duplex primary. - B’11’ = Failed duplex not primary.
19	13	SMF745DVS2	1	binary	Addressed device status flag # 2. Bit - Meaning When Set 0 Device is failed duplex. 1 Pinned data exits for device. 2-7 Other device in duplex pair.
20	14	SMF745DRCR	4	s_float	Search read caching requests.
24	18	SMF745DCRH	4	s_float	Search read caching hits.
28	1C	SMF745DWRC	4	s_float	Write caching requests.
32	20	SMF745DWCH	4	s_float	Write caching request hits.
36	24	SMF745DRSR	4	s_float	Read sequential requests.
40	28	SMF745DRSH	4	s_float	Read sequential request hits.
44	2C	SMF745DWSR	4	s_float	Write sequential requests.
48	30	SMF745DWSH	4	s_float	Write sequential request hits.
52	34	SMF745DRNR	4	s_float	Search read non-retentive requests.
56	38	SMF745DNRH	4	s_float	Search read non-retentive request hits.
60	3C	SMF745DWNR	4	s_float	Write non-retentive requests.
64	40	SMF745DWNH	4	s_float	Write non-retentive hits.
68	44	SMF745DICL	4	s_float	Inhibit cache load requests.
72	48	SMF745DBCR	4	s_float	Bypass cache requests.
76	4C	SMF745DTC	4	s_float	Sequential DASD to cache XFRs.
80	50	SMF745DNTD	4	s_float	Normal cache requests DASD to cache XFRs.
84	54	SMF745DCTD	4	s_float	Cache to DASD XFRs.
88	58	SMF745DFWB	4	s_float.	Fast write bypass count.
92	5C	SMF745DFWC	4	s_float	Fast write caching requests.
96	60	SMF745DFWS	4	s_float	Fast write sequential requests.
100	64	SMF745DCRM	4	s_float	Record cache read misses.
104	68	SMF745DSG2	1	binary	Device status group 2. Bit - Meaning When Set 0-1 Record cache optimization level: - B’00’ = Full adapt rec cache - B’01’ = Adapt rec. cache writes - B’10’ = Rec cache on def ext - B’11’ = Track mode 2 Data exits in failed NVS. 3 Defective battery, destage pending. 4-5 Volume state: - B’00’ = Non spare. - B’01’ = Reserved. - B’10’ = Spare. - B’11’ = Broken spare. 6-7 Pinned data: - B’00’ = No pinned data and FW. - B’01’ = Pinned data and not FW suspend. - B’10’ = Reserved. - B’11’ = Pinned data and FW suspend.
105	69	SMF745INCR	1	binary	Status code. 0 Transfer statistics not valid. 1 Transfer statistics valid. Bytes in units of 128K. Times in units of 16 milliseconds.
106	6A	SMF745DSID	2	binary	Subsystem ID.
108	6C	SMF745DCWP	4	s_float	RCD cache write promotions.
112	70	SMF745DKDW	4	s_float	CKD writes, collected for 3990-03/06 and 2105.
116	74	SMF745DKDH	4	s_float	CKD write hits, collected for 3990-03/06 and 2105.
120	78	SMF745DFWR	4	s_float	CFW bypass, collected for 3990-03/06 and 2105.
124	7C	SMF745BYTR	4	s_float	Bytes read. See SMF745INCR.
128	80	SMF745BYTW	4	s_float	Bytes written. See SMF745INCR.
132	84	SMF745RTIR	4	s_float	Response time to read bytes. See SMF745INCR.
136	88	SMF745RTIW	4	s_float	Response time to write bytes. See SMF745INCR.
Subtype 5 — Cache Device Data Section Extension There is one section per device. This extension applies only to control unit types 3990-03/06. It is collected by RMF to provide the same data as in the corresponding CRR record.(Offset from beginning of record: SMF745XO)
0	0	SMF745XDVN	2	binary	Device number.
2	2	--	2	binary	Reserved.
4	4	SMF745XRSV	4	s_float	Lower interface I/O response time (in milliseconds).
8	8	SMF745XCTC	4	s_float	Not used by RMF.
12	C	SMF745XCTR	4	s_float	Not used by RMF.
16	10	SMF745XVRD	4	s_float	Not used by RMF.
20	14	SMF745XVRH	4	s_float	Not used by RMF.
24	18	SMF745XVWR	4	s_float	Not used by RMF.
28	1C	SMF745XVWH	4	s_float	Not used by RMF.
32	20	SMF745XSRR	4	s_float	Not used by RMF.
36	24	SMF745XFRD	4	s_float	Not used by RMF.
40	28	SMF745XWCC	4	s_float	Not used by RMF.
44	2C	SMF745XPRC	4	s_float	Not used by RMF.
48	30	SMF745XCT1	4	s_float	Not used by RMF.
52	34	SMF745XCT2	4	s_float	Not used by RMF.
56	38	SMF745XCT3	4	s_float	Not used by RMF.
60	3C	SMF745XCT4	4	s_float	Not used by RMF.
64	40	SMF745XCT5	4	s_float	Not used by RMF.
68	44	SMF745XCT6	4	s_float	Not used by RMF.
72	48	SMF745XCT7	4	s_float	Not used by RMF.
76	4C	SMF745XCT8	4	s_float	Not used by RMF.
80	50	SMF745XCT9	4	s_float	Not used by RMF.
84	54	SMF745XCTA	4	s_float	Not used by RMF.
Subtype 5 — Cache Control Unit Status Data Section There is one section per record.(Offset from beginning of record: SMF745SO)
0	0	SMF745SVOL	6	EBCDIC	Volume serial of device.
6	6	--	2	binary	Reserved.
8	8	SMF745SUNT	3	binary	Unit address for sense command.
11	B	--	1	binary	Reserved.
12	C	SMF745SDEV	2	binary	Device number.
14	E	SMF745SLN	2	binary	Length of data section.
16	10	SMF745SFT	1	binary	Status data format. Bit - Meaning When Set 0-3 Reserved. 4-7 Format of data returned: - B’....0000’ = 40 bytes sense. - B’....1111’ = 44 bytes sense.
17	11	SMF745SDID	1	binary	Device ID.
18	12	SMF745SNAD	1	binary	Number of attached devices.
19	13	SMF745SNSS	1	binary	Number of statistic sets.
20	14	SMF745SCS	1	binary	Caching status. Bit - Meaning When Set 0-2 Overall caching status: - B’000’ = Caching active. - B’001’ = Pending active. - B’010’ = Subsystem error. - B’011’ = Reserved. - B’100’ = Host or support facility deactivated. - B’101’ = Cache suspended. - B’110’ = Pending off in process. - B’111’ = Pending off failure. 3 Disabled for maintenance. 4-5 Reserved. 6 IML device not available. 7 Non-retentive deactivated.
21	15	SMF745SVSS	1	binary	Non-volatile storage status. Bit - Meaning When Set 0 Host termination. 1 Problem termination. 2 Reserved. 3 Disabled for maintenance. 4 Pending due to problem. 5-7 Reserved.
22	16	SMF745SCLN	2	binary	Length of subsystem count area.
24	18	--	2	binary	Reserved.
26	1A	SMF745SCNF	4	binary	Configured subsystem storage.
30	1E	SMF745SAVL	4	binary	Available subsystem storage.
34	22	SMF745SPIN	4	binary	Pinned subsystem storage, collected for 3990-03/06 and 2105 only.
38	26	SMF745SOFF	4	binary	Offline subsystem storage, collected for 3990-03/06 and 2105 only.
42	2A	SMF745SDS1	1	binary	Addressed device status 1. Bit - Meaning When Set 0-1 Device caching status: - B’00’ = Activated. - B’01’ = Not used. - B’10’ = Deactivate pending. - B’11’ = Deactivated. 2-3 DASD fast write status: - B’00’ = DFW allowed. - B’01’ = Not used. - B’10’ = Deactivate pending. - B’11’ = Deactivated. 4 Primary duplex pair. 5 Secondary duplex pair. 6-7 Duplex pair status: - B’00’ = Available. - B’01’ = Pending. - B’10’ = Failed primary. - B’11’ = Failed not primary.
43	2B	SMF745SDS2	1	binary	Addressed device status 2. Bit - Meaning When Set 0 Device is failed duplex. 1 Pinned data. 2-7 Other device in duplex.
44	2C	SMF745SCNV	4	binary	Configured non-volatile cache, collected for 3990-03/06 and 2105 only.
48	30	SMF745SPND	4	binary	Pinned non-volatile cache, collected for 3990-03/06 and 2105 only.
52	34	SMF745SG2	1	binary	Device status group 2. Bit - Meaning When Set 0-1 Cache optimization level: - B’00’ = Rec full adapt. - B’01’ = Write rec adapt. - B’10’ = Def ext record. - B’11’ = Track mode. 2 Data on failed NVS. 3 Defective battery destage pending. 4-5 Volume state: - B’00’ = Non spare. - B’01’ = Reserved. - B’10’ = Spare. - B’11’ = Broken spare. 6-7 Pinned data: - B’00’ = Not pinned and FW. - B’01’ = Pinned and not FW suspended. - B’10’ = Reserved. - B’11’ = Pinned and FW suspended.
53	35	SMF745SGL	1	binary	Global status. Bit - Meaning When Set 0 CFW and DFW suspended. 1-7 Reserved.
54	36	SMF745SSID	2	binary	Subsystem ID.
56	38	--	1	binary	Reserved.
57	39	--	1	binary	Reserved.
58	3A	--	1	binary	Reserved.
59	3B	--	1	binary	Reserved.
60	3C	--	12	binary	Reserved.
Subtype 5 — RAID Rank/Extent Pool Data section There is one section per device.(Offset from beginning of record: SMF7451O)
0	0	SMF7451DVN	2	binary	Device number (binary).
2	2	SMF7451INC	1	binary	Flag Bit - Meaning When Set 0-3 Reserved. 4 zHPF read and write I/O requests SMF7451CT5 and SMF7451CT6 are available. 5-6 Measurement units: - B'00' = Bytes in units of 128K, and times in units of 16 milliseconds. - B'01', B'10', B'11' = Reserved. 7 Transfer statistics SMF7451XFR are valid.
3	3	--	1	binary	Reserved.
4	4	SMF7451RSV	4	s_float	Lower interface I/O response time (in milliseconds).
8	8	SMF7451FLG	1	binary	Flag. Value - Meaning 0 No additional information 1 RAID rank data. 2 Extent pool and physical storage data.
9	9	SMF7451AID	1	binary	Device adapter ID. Only valid with RAID rank data.
10	A	SMF7451RID	2	binary	RAID rank ID. The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
10	A	SMF7451XID	2	binary	Extent pool ID. This field is valid if SMF7451FLG is set to 2.
12	C	SMF7451HDD	1	binary	Number of HDDs in RAID rank. The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
12	C	SMF7452XTY	1	binary	Extent type: This field is valid if SMF7451FLG is set to 2. Value - Meaning X'04' FB 1Gb X'84' CKD 1Gb
13	D	SMF7451RTY	1	binary	RAID rank type. Value - Type 0 RAID-5 1 JBOD 2 RAID-10
13	D	SMF7452XFL	1	binary	Extent pool flag: This field is valid if SMF7451FLG is set to 2. Bit - Meaning When Set 0 Dynamic extent allocation 1 Data sharing 2 Migrating/migration state 3-7 Reserved.
14	E	SMF7451HSS	2	binary	HDD sector size.
16	10	SMF7451RRQ	4	s_float	RAID rank read requests. The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
16	10	SMF7452PRO	4	s_float	Physical storage read operations. This field is valid if SMF7451FLG is set to 2.
20	14	SMF7451WRQ	4	s_float	RAID rank write requests. The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
20	14	SMF7452PWO	4	s_float	Physical storage write operations. This field is valid if SMF7451FLG is set to 2.
24	18	SMF7451SR	4	s_float	RAID rank FB sectors read. The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
24	18	SMF7452PBR	4	s_float	Physical storage bytes read. For units, see bits 5 and 6 of SMF7451INC. This field is valid if SMF7451FLG is set to 2.
28	1C	SMF7451SW	4	s_float	RAID rank FB sectors written. The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
28	1C	SMF7452PBW	4	s_float	Physical storage bytes written. For units, see bits 5 and 6 of SMF7451INC. This field is valid if SMF7451FLG is set to 2.
32	20	SMF7451RMR	4	s_float	Record mode read request.
36	24	SMF7451XSF	4	s_float	Extended-Remote-Copy(XRC) or Concurrent-Copy(CC) sidefile read request.
40	28	SMF7451XCW	4	s_float	XRC or CC contaminated writes.
44	2C	SMF7451TSP	4	s_float	Number of tracks transferred to secondary Peer-to-Peer-Remote-Copy(PPRC) volume.
48	30	SMF7451NVS	4	s_float	NVS space allocation.
52	34	SMF7451RRT	4	s_float	RAID rank read response time (in milliseconds). The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
52	34	SMF7452PRT	4	s_float	Physical storage read response time. For units, see bits 5 and 6 of SMF7451INC. This field is valid if SMF7451FLG is set to 2.
56	38	SMF7451WRT	4	s_float	RAID rank write response time (in milliseconds). The information in this field is available only for one device belonging to the rank, as indicated by flag SMF7451FLG. This field is valid if SMF7451FLG is set to 1.
56	38	SMF7452PWT	4	s_float	Physical storage write response time. For units, see bits 5 and 6 of SMF7451INC. This field is valid if SMF7451FLG is set to 2.
60	3C	SMF7451CT1	4	s_float	Bytes read. For units, see bits 5 and 6 of SMF7451INC.
64	40	SMF7451CT2	4	s_float	Bytes written. For units, see bits 5 and 6 of SMF7451INC.
68	44	SMF7451CT3	4	s_float	Read response time. For units, see bits 5 and 6 of SMF7451INC.
72	48	SMF7451CT4	4	s_float	Write response time. For units, see bits 5 and 6 of SMF7451INC.
76	4C	SMF7451CT5	4	s_float	Number of zHPF read I/O requests (valid if bit 4 in SMF7451INC is set).
80	50	SMF7451CT6	4	s_float	Number of zHPF write I/O requests (valid if bit 4 in SMF7451INC is set).
84	54	--	4	binary	Reserved. .
88	58	SMF7451ZHL	4	s_float	zHPF List Pre-fetch I/O Requests. Number of command chains, where the Transport Mode operation specified a non-zero Imbedded Locate Record Count.
92	5C	SMF7451ZHH	4	s_float	zHPF List Pre-fetch I/O Request Hits. Number of command chains, where the Transport Mode operation specified a non-zero Imbedded Locate Record Count. the chain was completed without requiring access to any DDM.
96	60	SMF7451GSF	4	s_float	Global Mirror Collisions sidefile count. A GMC occurs when, during the sending of data in the secondary to create a consistency group, a subsequent host update is attempted before the modified track has been transmitted to the secondary volume. The modified track will be moved to the sidefile before allowing a new host write. The counter will be incremented by one when a track is added to the sidefile.
100	64	SMF7451GSS	4	s_float	Global Mirror Collisions synchronous count. When a write collision occurs, the modified track data which belongs to the current consistency group may be sent to the remote control unit before allowing the write. The data may come from the sidefile if it is full or from cache if the collision sidefile is not being utilized.
104	68	--	32	binary	Reserved

The table above is based on the description provided by IBM in its "MVS Systems Management Facilities (SMF)" manual.

Spectrum SMF Writer - the 4GL SMF Report Writer.

Sample Report from SMF 74 Subtype 4 Records
Showing RMF Coupling Activity Over an Interval

The sample SMF report below was created with Spectrum SMF Writer, the low-cost 4GL SMF report writer.

This report reads as input the SMF file and selects just the type 74 RMF Activity records with subtype = 4. (See SMF 74 record layout.) Each of these SMF records contains multiple Request Sections. We normalize these sections in order to easily print the same report information from each request section. We then print a report line for each Request Section, showing various statistics relating to synchronous and asynchronous requests during the interval. It also shows a count of certain requests for which no resource was available.

In this report, we take advantage of several of Spectrum's special formatting options. The BIZ ("blank if zero") option suppresses 0 values, which can clutter up a report. Also, since the SMF744SASQ field encompasses a wide range of values, we used a "scaled" type of picture to format it. Spectrum automatically displays a value with the appropriate K, M, G, ... suffix as necessary. This technique lets you display more data (in smaller columns) when it is not essential to know the exact value of a field.

We also used another technique to squeeze more data columns into the report. Since the identical Sysplex and System names appear for hundreds of consecutive lines, we moved those 2 fields from the detail report lines up into the page titles. We page-break on those fields to insure that the data on each page comes from a single Sysplex-System.

All of this with just a couple of dozen lines of code!
Why not install a Spectrum SMF Writer trial right now and start making your own SMF reports!

These Spectrum SMF Writer Statements:


OPTION: SCALEPICS /* ALLOW VARIABLY SCALED PICTURES */
OPTION: HDGSEP('/') /* CHANGE DEFAULT SEPERATOR CHAR */

INPUT: SMF74 NORMWHEN(SMF74RTY=74 AND SMF74STY=4)
             NORMALIZE(SMF74_REQ_SECTION, SMF744SN)

INCLUDEIF: SMF74RTY=74 AND SMF74STY=4

TITLE: #DATE / 'RMF COUPLING ACTIVITY REPORT' / 'PAGE' #PAGENUM
TITLE: 'SYSPLEX:' SMF74XNM 'SYSTEM:' SMF74SNM

COLUMNS:
     SMF744SNAM('CONNECTED/STRUCTURE')
     SMF74IST('INTERVAL/START/TIME')
     SMF74INT_TIME(TP'ZZ:Z9.999' 'INTERVAL/LENGTH')
     SMF744SSIZ(8 'STRUCT/SIZE' BIZ)
     SMF744SARC_VAL('TOTAL/ASYNCH/OPERS' 8 BIZ)
     SMF744SASQ('SUM/SQRS/SERVIC/TIME/ASYNCH' 6 P'Z,ZZ9@' BIZ)
     SMF744SATM('SUM/SERVIC/TIME/ASYNCH' 10 BIZ)
     SMF744SSTA_VAL('ASYNCH/REQS/NO RESRC' 8 BIZ)
     SMF744SSRC_VAL('CNT/TIMES/SYNCH/REQS' 8 BIZ)
     SMF744SSSQ('SUM-SQRS/SERVIC/TIME/SYNCH' 10 BIZ)
     SMF744SSTM('SUM/SERVIC/TIME/SYNCH' 10 BIZ)

SORT:  SMF74XNM SMF74SNM SMF74DTE SMF74TME SMF744SNAM
BREAK: SMF74SNM SPACE(PAGE)

Produce This SMF Report:


 08/14/07                                 RMF COUPLING ACTIVITY REPORT                                 PAGE    1
                                       SYSPLEX: SYSPL9   SYSTEM: S01

                                                        SUM
                                                        SQRS     SUM                CNT     SUM-SQRS     SUM
                  INTERVAL                     TOTAL   SERVIC   SERVIC    ASYNCH   TIMES     SERVIC     SERVIC
    CONNECTED      START   INTERVAL   STRUCT   ASYNCH   TIME     TIME      REQS    SYNCH      TIME       TIME
    STRUCTURE       TIME    LENGTH     SIZE    OPERS   ASYNCH   ASYNCH   NO RESRC   REQS     SYNCH      SYNCH
 ________________ ________ _________ ________ ________ ______ __________ ________ ________ __________ __________

 ACF2_LIDS        09:30:00 10:00.000   50,048   16,034 1,004M  2,013,709                68    184,508      3,490
 BERVM_SMI1       09:30:00 10:00.000    2,304
 BERVM_SMS2       09:30:00 10:00.000    2,304    3,459   200M    472,144                13    261,598      1,150
 BERVM_SMS3       09:30:00 10:00.000    2,304    1,025    28M    104,325                 5      9,526        208
 BERVM_SMT0       09:30:00 10:00.000    2,304    1,352    76M    160,125        3        4     15,481        241
 BERVM_SMZ0       09:30:00 10:00.000    2,304      885    18M     87,762                 6     17,237        307
 BERVM_SM10       09:30:00 10:00.000    2,304    1,070    91M    177,594                 5    230,667        667
 CRAF_HBP0        09:30:00 10:00.000   12,544      445    14M     51,859                93    111,532      2,456
 CRAF_HBP0        09:30:00 10:00.000   12,672      128 6,997K     20,516
 CRAF_HBP1        09:30:00 10:00.000   20,224      117 3,568K     16,920                 8      4,659        193
 CRAF_HBP1        09:30:00 10:00.000   20,096      367    16M     50,839       14       26     15,918        642
 CRAF_HBP16K0     09:30:00 10:00.000    5,376       14 1,471K      2,474                16      9,661        393
 CRAF_HBP16K0     09:30:00 10:00.000    5,376
 CRAF_HBP2        09:30:00 10:00.000   24,576       46   758K      5,104                 6      3,270        140
 CRAF_HBP2        09:30:00 10:00.000   24,448      183 2,708K     17,469                55     30,184      1,276
 CRAF_HBP32K      09:30:00 10:00.000   13,824       63 1,575K      7,444                33     21,962        850
 CRAF_HBP32K      09:30:00 10:00.000   13,824       33   674K      3,280
 CRAF_HBP8        09:30:00 10:00.000      640
 CRAF_HBP8        09:30:00 10:00.000      640       14   176K      1,311                15      9,393        375
 CRAF_HBP8K0      09:30:00 10:00.000    5,632      191 5,466K     24,221                21     25,874        640
 CRAF_HBP8K0      09:30:00 10:00.000    5,632        9 1,132K      2,970
 CSAF_LOCK1       09:30:00 10:00.000    8,064    2,658    53M    220,344            10,652 *****S****    264,935
 CSAF_SCA         09:30:00 10:00.000    8,192    1,588   167M    244,692                 8     52,673        649
 CTBA_GBP0        09:30:00 10:00.000    2,688       37   535K      3,595
 CTBA_GBP0        09:30:00 10:00.000    2,688       71 1,601K      6,251                41     28,214      1,074
 CTBA_GBP1        09:30:00 10:00.000    2,304       14   217K      1,213                14      9,086        356
 CTBA_GBP1        09:30:00 10:00.000    2,304
 CTBA_GBP11       09:30:00 10:00.000    1,920
 CTBA_GBP11       09:30:00 10:00.000    1,920       14   134K      1,108                14      8,815        351
 CTBA_GBP16K0     09:30:00 10:00.000      896       15   272K      1,488                14      8,664        348
 CTBA_GBP16K0     09:30:00 10:00.000    1,024
 CTBA_GBP2        09:30:00 10:00.000    2,816       30   629K      3,219
 CTBA_GBP2        09:30:00 10:00.000    2,688       56   772K      4,903                33     23,489        879
 CTBA_GBP21       09:30:00 10:00.000    1,408
 CTBA_GBP21       09:30:00 10:00.000    1,408       14   119K      1,054                14      8,754        350
 CTBA_GBP32K      09:30:00 10:00.000    1,664       57 1,087K      5,867                31     21,332        812
 CTBA_GBP32K      09:30:00 10:00.000    1,792       29   414K      2,642
 CTBA_GBP8K0      09:30:00 10:00.000    2,048       30   352K      2,486
 CTBA_GBP8K0      09:30:00 10:00.000    2,048       55   807K      5,043                34     23,816        898
 CTBA_LOCK1       09:30:00 10:00.000    3,072    1,046 8,942K     78,236             3,400 22,415,563     81,367
 CTBA_SCA         09:30:00 10:00.000    3,456    1,759    59M    253,463        1       13     84,538      1,048
 CTLF_GBP0        09:30:00 10:00.000    8,448       10   122K      1,012
 CTLF_GBP0        09:30:00 10:00.000    8,320       37   782K      4,313                16     10,471        409
 CTLF_GBP1        09:30:00 10:00.000   12,544       15   359K      1,459                13      8,241        327
 CTLF_GBP1        09:30:00 10:00.000   12,672
 CTLF_GBP16K0     09:30:00 10:00.000    1,664       30   262K      2,249
 CTLF_GBP16K0     09:30:00 10:00.000    1,664       56   443K      3,703                33  6,709,361      3,423
 CTLF_GBP2        09:30:00 10:00.000    8,320       15   389K      1,656                13      8,141        325
 CTLF_GBP2        09:30:00 10:00.000    8,448
 CTLF_GBP32K      09:30:00 10:00.000    3,584       30   272K      2,255
 CTLF_GBP32K      09:30:00 10:00.000    3,584       57 1,922K      6,194                32     22,436        846

 
08/14/09                                 RMF COUPLING ACTIVITY REPORT                                 PAGE    2
                                       SYSPLEX: SYSPL9   SYSTEM: S01

                                                        SUM
                                                        SQRS     SUM                CNT     SUM-SQRS     SUM
                  INTERVAL                     TOTAL   SERVIC   SERVIC    ASYNCH   TIMES     SERVIC     SERVIC
    CONNECTED      START   INTERVAL   STRUCT   ASYNCH   TIME     TIME      REQS    SYNCH      TIME       TIME
    STRUCTURE       TIME    LENGTH     SIZE    OPERS   ASYNCH   ASYNCH   NO RESRC   REQS     SYNCH      SYNCH
 ________________ ________ _________ ________ ________ ______ __________ ________ ________ __________ __________

 CTLF_GBP8K0      09:30:00 10:00.000    4,096       15   353K      1,473                13      7,933        321
 CTLF_GBP8K0      09:30:00 10:00.000    4,096
 CTLF_LOCK1       09:30:00 10:00.000    4,992    1,214    11M     94,508             4,807 88,328,922    125,032
 CTLF_SCA         09:30:00 10:00.000    3,328    1,581    51M    225,834                 4     26,085        323
 CTOC_GBP0        09:30:00 10:00.000    3,456       50 1,690K      5,850
 CTOC_GBP0        09:30:00 10:00.000    3,456      117 8,598K     16,027                32     22,793        853
 CTOC_GBP1        09:30:00 10:00.000    5,376  112,254 9,213M 18,493,219        4    3,040 35,668,753    110,881
 CTOC_GBP1        09:30:00 10:00.000    5,376      555    21M     84,176
 CTOC_GBP16K0     09:30:00 10:00.000    1,280
 CTOC_GBP16K0     09:30:00 10:00.000    1,280       14   105K      1,061                14      8,260        340
 CTOC_GBP2        09:30:00 10:00.000    5,504    1,033   115M    222,123               787 38,159,579     24,539
 CTOC_GBP2        09:30:00 10:00.000    5,504      732    39M    127,868                 1        529         23
 CTOC_GBP32K      09:30:00 10:00.000    1,536       30   320K      2,389
 CTOC_GBP32K      09:30:00 10:00.000    1,536       58   895K      4,993                33  5,624,615      3,203
 CTOC_GBP8K0      09:30:00 10:00.000    2,048       56   626K      4,361                33     22,278        856
 CTOC_GBP8K0      09:30:00 10:00.000    2,048       30   725K      3,022
 CTOC_LOCK1       09:30:00 10:00.000    4,096    5,707   130M    520,062            10,994 *****S****    338,972
 CTOC_SCA         09:30:00 10:00.000    1,920    1,606    55M    242,189        1        6     39,090        484
 CTTF_GBP0        09:30:00 10:00.000    8,320      919    26M    112,207                 1        529         23
 CTTF_GBP0        09:30:00 10:00.000    8,320    4,400   325M    645,466               153  1,551,026      6,028
 CTTF_GBP1        09:30:00 10:00.000   32,512   57,719 2,150M  5,634,117    1,071    6,178 33,254,757    163,883
 CTTF_GBP1        09:30:00 10:00.000   32,640    5,404   206M    724,337                81     45,930      1,924
 CTTF_GBP16K0     09:30:00 10:00.000    5,376
 CTTF_GBP16K0     09:30:00 10:00.000    5,376       15    77K        951                13      8,035        323
 CTTF_GBP2        09:30:00 10:00.000   32,512   17,088 1,177M  2,471,064    1,131    7,981 61,967,099    203,089
 CTTF_GBP2        09:30:00 10:00.000   32,512    3,385   423M    515,302               151     84,553      3,571
 CTTF_GBP32K      09:30:00 10:00.000   10,752      656    64M    165,137                42     21,778        956
 CTTF_GBP32K      09:30:00 10:00.000   10,752    1,293   108M    319,735               191    351,906      5,634
 CTTF_GBP8        09:30:00 10:00.000      512      318 3,979K     26,878               251    109,958      5,242
 CTTF_GBP8        09:30:00 10:00.000      512       13   460K      2,267
 CTTF_GBP8K0      09:30:00 10:00.000    5,632      270 9,077K     39,335
 CTTF_GBP8K0      09:30:00 10:00.000    5,632    1,160    42M    140,510                68    174,474      2,032
 CTTF_LOCK1       09:30:00 10:00.000   29,184   25,062   730M  2,086,495            72,151 *****S****  1,831,872
 CTTF_SCA         09:30:00 10:00.000    8,192    1,667    90M    248,925                 5     31,698        398
 CTZF_GBP0        09:30:00 10:00.000    7,552      129 6,075K     20,228                 1        841         29
 CTZF_GBP0        09:30:00 10:00.000    7,552      479    20M     73,993        1       36     24,738        942
 CTZF_GBP1        09:30:00 10:00.000   15,104    2,328    85M    325,305               145    431,041      4,537
 CTZF_GBP1        09:30:00 10:00.000   15,104    1,080    37M    146,591                 7      3,848        164
 CTZF_GBP16K0     09:30:00 10:00.000    1,664       30   368K      2,500
 CTZF_GBP16K0     09:30:00 10:00.000    1,664       57   745K      4,820                31     21,507        815
 CTZF_GBP2        09:30:00 10:00.000    8,576      455    27M     61,207                40     30,271      1,085
 CTZF_GBP2        09:30:00 10:00.000    8,576      298    22M     41,913                 1        784         28
 CTZF_GBP32K      09:30:00 10:00.000    2,304       29 1,461K      3,752
 CTZF_GBP32K      09:30:00 10:00.000    2,304       56 1,006K      5,024                34     23,225        887
 CTZF_GBP8        09:30:00 10:00.000      512      117 1,930K     12,466                38     29,333      1,015
 CTZF_GBP8        09:30:00 10:00.000      640       67 1,486K      8,575
 CTZF_GBP8K0      09:30:00 10:00.000    4,864       42 1,794K      7,158                 3      1,638         70
 CTZF_GBP8K0      09:30:00 10:00.000    4,864      184    15M     37,988                54     27,391      1,213
 CTZF_LOCK1       09:30:00 10:00.000    5,888    4,592   144M    384,811             8,320 *****S****    230,595
 CTZF_SCA         09:30:00 10:00.000    3,328    1,861    94M    284,565                 5     31,692        398
 DFHXQLS_DFHTSA01 09:30:00 10:00.000    1,408

 ...

See other sample SMF reports.