User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands
Request Sense (03h)
250 Quantum DX-Series Software Interface Guide
EOM End of Medium. This bit indicates that an End of
Medium condition (End of Partition or Beginning of
Partition) exists. The warning is also given by
setting the Sense Key to NO SENSE and the
Additional Sense Qualifier to End of Partition or
Beginning of Partition.
ILI Incorrect Length Indicator. This bit indicates that
the requested logical block length did not match the
logical block length of the data on the tape medium.
Only READ or VERIFY may cause this bit to be set.
Sense Key In most cases, Additional Sense Code and/or
Qualifier information is available. The codes and
qualifiers are covered in detail in Table 5-72.
Information
Bytes
These bytes contain the differences (residue) of the
requested length minus the actual length in bytes,
blocks, or Filemarks, as determined by the
command. Negative values are indicated by two’s
complement notation. The bytes are valid for all
READ, WRITE, SPACE, and VERIFY tape
commands for which a CHECK CONDITION status
has been generated. The information bytes are 0 for
MODE SELECT / SENSE, INQUIRY, READ
BLOCK LIMITS, and TEST UNIT READY.
Additional
Sense
Length
This field 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
truncation.
Command
Specific
Information
Bytes
Command Specific Information Bytes can be logged
by the operating system on error conditions. On
tape medium errors, such an entry usually contains
the current SCSI Logical Block Address.
Field Name Description