IBM System Storage TS3310 Setup And Operator Manual page 252

Note:
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TS3310 Tape Library Setup and Operator Guide
1. The Error Code field (Byte 0) is set to 70h to indicate a current error,
that is one associated with the most recently received command. It is
set to 71h to indicate a deferred error which is not associated with the
current command.
2. The segment number (Byte 1) is zero since the Copy, Compare, and
Copy and Verify commands are not supported.
3. The File Mark flag (Byte 2, bit 7) is set if a Space, Read, or Verify
command did not complete because a file mark was read.
4. The End of Media (EOM) flag (Byte 2, bit 6) is set if a Write or Write
File Marks command completed in the early warning area. Spacing into
BOM also causes this flag to be set. It is also set on an attempt to read
or space past EOD, or if an attempt is made to space into Beginning of
Media.
5. The Illegal Length Indicator (ILI) flag (Byte 2, bit 5) is set if a Read or
Verify ended because a block was read from tape that did not have the
block length requested in the command.
6. The Information Bytes (Bytes 3–5) are only valid if the Valid flag is set.
This occurs only for current errors and not for deferred errors.
7. The Field Replaceable Unit field (Byte 14) is set to either zero or to a
non-zero, vendor-specific code indicating which part of the drive is
suspected of causing the failure.
8. The Clean (CLN) flag (Byte 21, bit 3) is set if the drive needs cleaning
and clear otherwise.
9. The Volume Label Fields Valid (VolValid) bit (Byte 21, bit 0) is set if the
Volume Label being reported is valid.
10. The Volume Label field (Bytes 22–28) reports the volume label if a
cartridge is loaded in the drive and Volume Label Fields Valid is set.
11. The Current Wrap field (Byte 29) reports the physical wrap of the tape.
The least significant bit reflects the current physical direction. A 0
means that the current direction is away from the physical beginning of
the tape. A 1 means that the current direction is towards the physical
beginning of the tape.
12. Relative LPOS fields (Bytes 30–33) reports the current physical position
on the tape.
13. SCSI Address field (Byte 34) reports the SCSI Bus Address for the drive.
Values returned range from 00h to 0Fh.