SMF Type 21 Record

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SMF Type 21 Record -- Error Statistics by Volume
Offset (Dec.)	Offset (Hex)	Name	Length	Format	Description
0	0	SMF21LEN	2	binary	Record length. This field and the next field (total of four bytes) form the RDW (record descriptor word). See “Standard SMF Record Header” on page 13-1 for a detailed description.
2	2	SMF21SEG	2	binary	Segment descriptor (see record length field).
4	4	SMF21FLG	1	binary	System indicator: Bit Meaning When Set 0-2 Reserved 3-6 Version indicators* 7 Reserved.*See “Standard SMF Record Header” on page 13-1 for a detailed description.
5	5	SMF21RTY	1	binary	Record type 21 (X'15').
6	6	SMF21TME	4	binary	Time since midnight, in hundredths of a second, when the record was moved into the SMF buffer.
10	A	SMF21DTE	4	packed	Date when the record was moved into the SMF buffer, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
14	E	SMF21SID	4	EBCDIC	System identification (from the SID parameter).
18	12	SMF21LGH	2	binary	Length of rest of record.
20	14	SMF21VOL	6	EBCDIC	Volume serial number.
26	1A	SMF21CA	2	binary	Device number or device address.
28	1C	SMF21UCB	4	binary	UCBTYP value.
31	1F	SMF21DEV	1	binary	Low order byte of UCB device type. Values less than X’80’ represent reel tapes. Values of X’80’ or greater represent cartridge tapes.
32	20	SMF21TR	1	binary	Number of temporary read errors (non-buffered log).
33	21	SMF21TW	1	binary	Number of temporary write errors (non-buffered log).
34	22	SMF21SIO	2	binary	Number of start sub-channel (SSCH) instructions.
36	24	SMF21PR	1	binary	Number of permanent read errors.
37	25	SMF21PW	1	binary	Number of permanent write errors.
38	26	SMF21NB	1	binary	Number of noise blocks (non-buffered log).
39	27	SMF21ERG	2	binary	Number of erase gaps.
41	29	SMF21CLN	2	binary	Number of cleaner actions.
43	2B	SMF21DEN	1	binary	Tape format — 2400 and 3400 series magnetic tape units Dens Devtype Code Hex SMF21625 SMF21F62 SMF21160 SMF21F16 SMF21800 SMF21780 SMF21556 SMF21200 6250 9-track 4 D3 3424 4 C2 1600 9-track 3 C3 3424 3 42 800 9-track 2 CB 7-track 2 83 556 7-track 1 43 200 7-track 0 03
44	2C	SMF21BLS	2	binary	Block size of the last data set closed on the tape if the tape was demounted during CLOSE processing, not at a different time. Some programs that use EXCP do not provide a block size. This field is valid only (but still might contain zero) when bit SMF21LB is off.
46	2E	SMF21OFL	1	binary	DCBOFLGS. Bit SMF21OFL SMF21OUT SMF21RDB Meaning 1... .... Output tape .1.. .... Input tape (READ BACKWARD)
47	2F	SMF21TUS	3	packed	Tape unit serial.
50	32	SMF21TRF	2	binary	Temporary read forward errors.
52	34	SMF21TRB	2	binary	Temporary read backward errors.
54	36	SMF21TWF	2	binary	Temporary write errors.
56	38	SMF21BR	3	binary	Number of bytes read, in units of 4096. The length of each block is rounded up to a multiple of 4096 before being counted. This count includes volume mount and verify, in addition to task I/O. Provided only for cartridge tape devices. Maximum value is X’FFFFFF’.
59	3B	SMF21BW	3	binary	Number of bytes written, in units of 4096. The length of each block is rounded up to a multiple of 4096 before being counted. Provided only for cartridge tape devices. Maximum value is X’FFFFFF’.
62	3E	SMF21FL1	1	binary	SMF21FL1 SMF21NCT SMF21LS SMF21LB General flag bytes. Bit Meaning 1... .... SMF21BRN and SMF21BWN at 64 and 68 contain valid values. Currently this bit is on only for 3590. .1.. .... SMF21LST has a valid value. ..1. .... SMF21LBS has a valid value. ...x xxxx Reserved.
63	3F	SMF21FL2	1	bit string	Reserved.
64	40	SMF21BRN	4	unsigned binary	Number of bytes read, in units of 4096. The length of each block is rounded up to a multiple of 4096 before being counted. Valid only if SMF21NCT is on. If the value is less than X’FFFFFF’, it is also in SMF21BR.
68	44	SMF21BWN	4	unsigned binary	Number of bytes written, in units of 4096. The length of each block is rounded up to a multiple of 4096 before being counted. Valid only if SMF21NCT is on. If the value is less than X’FFFFFF’, it is also in SMF`21BW.
72	48	SMF21LST	4	unsigned binary	Number of I/Os initiated on current volume. Valid only if SMF21LS is on.
76	4C	SMF21LBS	4	unsigned binary	Block size. Valid only if SMF21LB is on.
80	50	SMF21DBR	4	unsigned binary	Number of bytes read by the device, in units of 4096. Valid only if SMF21DBV is on.
84	54	SMF21DBW	4	unsigned binary	Number of bytes written by the device, in units of 4096. Valid only if SMF21DBV is on.