7. ATAPI Packet Command Specification
REQUEST SENSE
SONY AIT-2 Turbo drive SDX-560V series Ver.1.0
7-56
The deferred error may be indicated by returning “Check Condition” status to the Host as described below. The
subsequent execution of a REQUEST SENSE command shall return the deferred error sense information. If an
I/O Command terminates with “Check Condition” status and the subsequent sense data returns a deferred error,
that I/O command shall
not
have been executed. After the Device detects a deferred error condition, it shall return
a deferred error according to the rules described below:
1. If a deferred error can be recovered with no external system intervention, a deferred error indication shall not
be set unless required by the error handling parameters of the MODE SELECT command. The occurrence of
the error may be logged if statistical or error logging is supported.
2. If a deferred error can be associated with a particular function or a particular subset of data, and the error is
either unrecovered or required to be reported by the mode parameters, a deferred error indication shall be
returned to the Host.
Deferred errors may indicate that an operation was unsuccessful long after the command performing the data
transfer returned “Good” status. If data that cannot be replicated or recovered from other sources is being stored
using buffered write operations, synchronization commands should be performed before the critical data is
destroyed in the Host. This is necessary to be sure that recovery actions can be taken if deferred errors do occur
in the storing of the data.
Sense key
Bytes
12 13
Description
NO SENSE:
Indicates that there is no specific sense key information to be reported for the designated
logical unit. This would be the case for a successful command or a command that received CHECK
CONDITION or COMMAND TERMINATED status because one of the File-mark, EOM, or ILI bits is set
to one. For File-mark or Set-mark detected the drive will be positioned on the EOM side of the mark if
the drive direction was forward and on the BOM side of the mark if the direction was reverse.
00 00
NO ADDITIONAL SENSE INFORMATION
00 01
FILEMARK DETECTED
00 02
END-OF-PARTITION/MEDIUM DETECTED
00 03
SETMARK DETECTED
00 04
BEGINNING-OF-PARTITION/MEDIUM DETECTED
00h
00 05
END-OF-DATA DETECTED
RECOVERED ERROR.
01h
5D 00
FAILURE PREDICTIONN THRESHOLD EXCEEDED
NOT READY
. Indicates that the logical unit addressed cannot be accessed. Operator
intervention may be required to correct this condition. Typically this indicates that there is
no tape loaded. This status is also returned if the drive is currently rewinding following
REWIND with Immediate bit set and another command is received (except for INQUIRY
and READ BLOCK LIMITS which return GOOD status).
04 00
LOGICAL UNIT NOT READY - Media is present within the drive. This status is returned to any tape
motion command following UNLOAD with Immediate bit set or if the Eject button has been pressed by
the operator. Also can be caused by the command sequence, PREVENT ALLOW MEDIA REMOVAL
with Prevent bit set followed by UNLOAD. Tape motion commands such as READ, WRITE or SPACE
are not allowed but Diagnostics which do not access the tape are permitted.
04 01
LOGICAL UNIT IS IN PROCESS OF BECOMING READY - This status is returned following a LOAD
command with the IMMED bit set for any tape motion command before the tape is loaded. Also during
the auto load following a tape insertion.
30 03
CLEANING CARTRIDGE INSTALLED
3A 00
MEDIUM NOT PRESENT-This status is returned for all tape motion commands when there is no media
within the tape.
02h
3E 00
LOGICAL UNIT HAS NOT SELF-CONFIGURED YET
