Chapter 5 SCSI Interface
SCSI Message System
Quantum|ATL PowerStor L200 Series Library User’s Guide
55
Table 12 Status
Bytes
The
Test Unit Ready
command is used to determine whether
the library would accept, for example, a Move Medium or
Position
command without returning a CHECK CONDITION
status.
Status Byte
Description
GOOD (00)
This status indicates the library successfully
completed the command.
CHECK
CONDITION
(02)
A contingent allegiance condition occurred. The
REQUEST SENSE
command should be sent
following this status to determine the nature of
the event.
BUSY (08)
The target is busy. This status is returned
whenever the device is unable to accept a
command from an otherwise acceptable initiator.
The initiator should reissue the command at a
later time.
INTERMEDIATE
GOOD (10h)
This status is returned instead of
GOOD
status for
commands issued with the
LINK
bit set.
Following the return of this status, the library
will proceed to the
COMMAND
phase for the
transfer of the next linked command.
RESERVATION
CONFLICT
(18h
This status is returned by the library whenever a
SCSI device attempts to access the library when it
has been reserved for another initiator with a
RESERVE UNIT
command.
COMMAND
TERMINATED
(22h)
This is the status returned for a command that
was terminated by a
TERMINATE I/O PROCESS
message. This status also indicates that a
contingent allegiance condition has occurred.
Summary of Contents for PowerStor L200
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