Commands 135
Commands
about to be transferred, or was being transferred. If an error subsequently
occurs while trying to complete the read, the sense generated is a
DEFERRED
ERROR
. It is therefore possible but highly unlikely to have DEFERRED ERROR
sense flagged for a command without immediate report.
Sense Keys
The following table lists the sense keys that may be returned by HP Ultrium
drives. SCSI sense keys are 4-bit codes returned in the sense data. They
indicate in what general area the problem that has just been experienced falls.
For a clearer indication of the nature of the problem, refer to the additional
sense code.
Code Name Description ASC/Qs
0h
NO SENSE There is no real problem. The sense information is
probably indicating some condition (such as encountering
a filemark).
0000h, 0001h, 0002h,
8282h
1h
RECOVERED ERROR Returned if a Mode Select parameter is truncated or if a
TapeAlert event is being reported.
5D00h, 3700h
2h
NOT READY The drive is not in a state to be able to execute the request.
See also the Media Access check.
0400h, 0401h, 0402h,
3003h, 3007h, 3A00h,
3E00h
3h
MEDIUM ERROR The command failed, believed to be caused by a problem
with the tape.
0002h, 0004h, 0407h,
0410h, 0C00h, 1100h,
1102h, 1400h, 3001h,
3002h, 3004h, 3100h,
3B00h, 5000h, 5200h,
5300h
4h
HARDWARE ERROR The command failed, believed to be caused by a problem
with the drive hardware.The FRU in the sense data should
indicate which part of the hardware is faulty.
0403h, 40XXh, 4400h,
5100h, 5300h
5h
ILLEGAL REQUEST The last command sent to the drive or the data associated
with the command violated conditions imposed by the
drive on its acceptance. See also the Illegal Command,
Illegal Field, Fixed Bit, Reservation and Parameter List pre-
execution checks.
1A00h, 2000h, 2400h,
2500h, 2600h, 2601h,
5302h, 8283h
6h
UNIT ATTENTION Indicates some condition of which the host needs to be
made aware. See also the Unit Attention check.
2800h, 290Xh, 2A01h,
3F01h, 5DFFh
7h
DATA PROTECT A request has been made to modify the media despite the
media being write-protected. See also the Media Write
check.
2700h, 3000h
