Fujitsu M2488 April 1997 CG00000-011503 REV. A 8-7, Table 8-4. Error Code 71 Sense Format Field Description

M2488 PRODUCT GUIDE MAINTENANCE AND SERVICING
April 1997 CG00000-011503 REV. A 8-7
Table 8-4. Error Code 71 Sense Format Field Description
BYTE BIT VALUE DESCRIPTION
0 7 1 When the valid bit is a one, sense bytes 3 to 6 indicate the difference between the number
of bytes, blocks, or filemarks requested by a command and the number of bytes, blocks,
or filemarks actually executed.
1 0-7 00h The segment number field contains the number of the current segment descriptor, if the
REQUEST SENSE command is in response to a COPY, COMPARE or COPY AND
VERIFY command. Up to 256 segments are supported beginning with segment zero.
2 0-3 Sense Key. See Appendix A for sense key descriptions.
2 5 The Incorrect Length Indicator (ILI) bit indicates the requested logical block length did
not match the logical block length of the data on the medium.
2 6 The End-Of-Medium (EOM) bit indicates an End-Of-Tape (EOT) or Beginning-Of-Tape
(BOT) condition exists. This bit indicates the unit is at or past the early-warning EOT if
the direction of the tape was forward or that the command could not be completed
because BOT was encountered when the direction was reverse.
2 7 The filemark bit indicates the current command has read a filemark.
3-6 The contents of the information field is device-type or command-specific and is defined
within the appropriate section for the device type or command of interest.
The information bytes contain the difference (residue) of the requested length minus the
actual length in either bytes or blocks, as determined by the command.
When operating in the buffered mode and an unrecoverable write error occurs, the infor-
mation bytes contain the number of unwritten data blocks and/or filemarks remaining in
the buffer.
7 0-7 24h The additional sense length specifies the number of additional sense bytes to follow. If
the allocation length of the Command Descriptor Block is too small to transfer all of the
additional sense bytes, the additional sense length is not adjusted to reflect the trunca-
tion.
8-11 The command-specific information field contains information that depends on the com-
mand which was executed. For this device, bytes 8-11 are zero.
12-13 The Additional Sense Code (ASC) byte 12 and Additional Sense Code Qualifier (ASCQ)
byte 13 provide additional error information. The additional sense codes and qualifiers
are listed in Appendix B.
14 Nonzero values in the FRU field are used to define a specific FRU or FRU-pair that has
failed. The FRU byte contains two nibbles of information. The low order nibble indi-
cates the highest probability FRU. The high-order nibble indicates a secondary FRU that
may also be responsible for the reported failure. This field is not used.
15-17 The meaning of the sense-key specific field depends on which sense key is returned and
whether the Sense-Key Specific Valid (SKSV) bit is a one. If the SKSV bit is a zero, the
field is not defined.
18 0-7 The format byte defines the format of bytes 20 - 43. See Table 8-15 on page 8-15 to iden-
tify the format of additional sense.