4-3.25.3 Reserve Unit Sense Keys - Fujitsu M2488 Product Manual

TAPE UNIT SCSI COMMANDS
Superseding reservations. An initiator that currently has a logical unit reserved may modify the
current reservation by issuing another RESERVE UNIT command to the same logical unit. The
superseding reservation releases the current reservation if the superseding reservation request is
granted. The current reservation is not modified if the superseding reservation request cannot be
granted. If the superseding reservation cannot be granted because of conflicts with a previous res-
ervation (other than the current reservation), then the target returns RESERVATION CONFLICT
status.
4-3.25.3 RESERVE UNIT Sense Keys
One of the following sense keys may be returned if a CHECK CONDITION was indicated:
SENSE KEY CONDITION
1h RECOVERED ERROR
3h MEDIUM ERROR
4h HARDWARE ERROR
5h ILLEGAL REQUEST
6h UNIT ATTENTION
Bh ABORTED COMMAND
Dh VOLUME OVERFLOW
4-114
Recovery was performed while writing buffered data before the
RESERVE UNIT occurred.
1. Write of buffered data failed due to a defective tape.
2. An attempt was made to write 36-track data on 18-track formatted
medium.
Write of buffered data failed due to a hardware failure.
1. Reserved bit was found set in the CDB of the RESERVE UNIT
command.
2. Initiator attempted to perform a third-party reservation for its own
ID.
3. The Flag bit was set but the Link bit was not set.
Indicates the RESERVE UNIT command was not performed due to
one of the following:
1. The tape cartridge may have been changed.
2. The target has been reset.
3. The Mode parameters have been changed by another initiator.
4. The version of the microcode has been changed (microcode down-
loaded).
5. A cartridge was loaded with a tape length that is too long or too
short.
The RESERVE UNIT command was aborted.
Write of buffered data prior to the RESERVE UNIT operation failed
because physical End-of-Tape has been reached.
CG00000-011503 REV. A
M2488 PRODUCT GUIDE
DESCRIPTION
April 1997