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SCSI Commands: 40BREQUEST SENSE
Page
172
Field
Bytes
Bits
Description
C/D
15
6
0 = The first error was encountered in the Data-Out Phase.
1 = The first error was encountered in the Command Descriptor
Block.
BPV
15
3
1 = The Bit Pointer field indicates the bit field in error.
Bit Pointer
15
0-2
If BPV is set, this field points to the most significant bit of the field in
error.
When a Log Exception is generated, this field indicates the affected
page that caused the Log Exception.
Field
Pointer
16-17
If BPV is set, this field points to the most significant byte of the field
in error.
When a Log Exception is generated, bytes 16 and 17 indicate the
MSB and LSB of the Log Parameter code that caused the Log
Exception. Byte 15 indicates the affected page that caused the
Log Exception.
For all other errors, this field contains message codes as defined in
Message Codes, Appendix A.
CLN
21
3
0 = The drive does not need cleaning.
1 = The drive needs cleaning.
Reserved
All reserved bits are 0.
3.28.3.2
Sense Key Values
The following table shows the meaning of the Sense Key values. For expanded
information, see Additional Sense Codes and Code Qualifiers, below.
Key Message
Definition
00h No
Sense
The Check Condition occurred in conjunction with detection of FM, EOM,
or ILI, or status was not available.
01h
Recovered
Error
The LOG SENSE counter reached its maximum value and the RLEC bit is
set.
02h Not
Ready
The drive is not ready to accept tape access commands. Operator
intervention may be required to correct this condition, or the drive may be
coming ready.
03h Medium
Error The command terminated with a non-recoverable error that was probably
caused by a flaw in the medium or an error in the recorded data.
04h Hardware
Error
The drive detected a non-recoverable hardware failure (parity, etc.) while
performing the command. Until the cartridge is ejected or a reset is
received, the drive continues to return this sense key to any tape motion
command.
05h
Illegal Request
The CDB or command parameters contained an illegal parameter.
06h Unit
Attention One of the following actions occurred: the cartridge was changed; the
drive was reset; the operational mode was changed; a Log Exception
occurred; or the firmware was changed.
07h
Data Protect
The cartridge is write-protected; the operation was not performed.
08h Blank
Check A no-data condition was encountered on the tape, or the wrong data
format was encountered on tape.
09h Vendor
Specific
Vendor specific conditions.
0Bh
Aborted
Command
The drive aborted the command. This key is returned if a bus parity error
is detected. The Initiator may be able to recover by trying the command
again.
ODh
Volume
Overflow
The drive reached the physical EOM, and write data remains in the buffer.
0Eh
MISCOMPARE
The source data did not match the tape data during a VERIFY command.
Summary of Contents for LTO 4
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