Quantum DLT-S4 Podręcznik Użytkownika Pobierz pdf (Strona 340)

100

101

Chapter 4 SCSI Commands

REQUEST SENSE Command (03h)

DLT-S4 Interface Reference Guide 306

The Sense Data are valid for a CHECK CONDITION or RESERVATION

CONFLICT

status returned on the previous command. The drive preserves

the Sense Data bytes until it is passed to the host as autosense data, it is

retrieved by a

REQUEST SENSE command or until the receipt of any other

command from the same initiator, though some commands, such as

INQUIRY, do not change Sense Data.

If the drive receives an unsolicited

REQUEST SENSE, it returns Sense Data

with the appropriate values in the End of Media (EOM), Sense Key,

Additional Sense Code, and Additional Sense Code Qualifier fields.

Figure 159

illustrates the REQUEST SENSE data format.

Figure 159 REQUEST

SENSE—Data Format

Bit

7 6 5 4 3 2 1 0

Byte

0 Valid Response Code (70h or 71h)

1 Obsolete

2 Filemark EOM ILI Reserved Sense Key

3 — 6

(MSB)

Information

(LSB)

7 Additional Sense Length (n – 7)

8 — 11

(MSB)

Command Specific Information

(LSB)

12 Additional Sense Code (ASC)

13 Additional Sense Code Qualifier (ASCQ)

14 Field Replaceable Unit Code

15 SKSV C/D Reserved BPV Bit Pointer

1 2 ... 335 336 337 338 339 340 341 342 343 344 345 ... 385 386

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