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OCTOBER 2006 VXA-320 TAPE DRIVE
47
SCSI COMMAND PROTOCOL
Illegal
Request
5h Indicates that there was an illegal parameter in the CDB or in the additional
parameters supplied as data for a command or that the tape drive is in the wrong
mode to execute the command. If the tape drive detects an invalid parameter in
the CDB, the tape is not written. If the tape drive detects an invalid parameter in
the additional parameters supplied as data, the tape may already be altered. This
sense key can also indicate an invalid Identify message.
Unit
Attention
6h Indicates one of the following:
The tape drive has been reset (by a power-on reset, a Bus Device Reset message,
or a SCSI bus reset).
An initiator changed the MODE SELECT parameters since the last command
was issued to the tape drive.
The eject button was pressed and the data cartridge was ejected.
A data cartridge was inserted and automatically loaded.
The internal microcode (firmware) was changed.
A log parameter (counter) reached a specified threshold value (assuming that
RLEC bit on the MODE SELECT Control Mode page is set to 1).
This sense key is reported the first time any command is issued by each initiator
after the condition is detected, and the requested command is not performed.
This sense key is cleared when the next command other than INQUIRY or
REQUEST SENSE is received by the tape drive.
Data
Protect
7h Indicates that a command that writes to tape was attempted on a write-protected
data cartridge. The write operation is not performed.
Blank
Check
8h Indicates that the tape drive encountered blank tape or format-defined EOD
(blank tape) during a read, space, or locate operation.
Aborted
Command
Bh Indicates that the tape drive aborted the command. This condition occurs when
an Initiator Detected Error (05h) message is received during command execution
or when a Message Reject (07h) or SCSI bus parity error is detected by the tape
drive during Command or Data Out phase.
The initiator may be able to recover by trying the command again.
Volume
Overflow
Dh Indicates that the last WRITE or WRITE FILEMARKS command reached the
physical end of tape (PEOT) and that data may remain in the buffer.
Miscompare Eh Indicates that the source data did not match the data read from the tape.
Table 6-8 Supported sense keys (continued)
Sense key
Hex
Value
Description