Quantum 1200 Series DAT Autochanger Guía de usuario descargar pdf (Pagina 260)

REQUEST SENSE Command (03h) SDLT 600 SCSI Interface Guide

4-218 January 2005 81-81200-02 REV A01

Table 4-129. REQUEST SENSE Data — Field Descriptions

Field Name Description

Valid When set to 1, indicates that the Information field contains valid SCSI-3

information. When set to 0, indicates that the contents of the Information

field are not defined by any command standard.

Response Code A value of 70h indicates a current error; the report is associated with the

most recently received command.

A value of 71h indicates a deferred error; the report is associated with a

previous command and not as a result of the current command.

No other values are returned in this field.

Filemark When set to 1, indicates that the current command read a Filemark.

EOM End of Medium. When set to 1, indicates that an End of Medium condition

(End of Partition or Beginning of Partition) exists. The warning is also given

by setting the Sense Key to NO SENSE and the Additional Sense Code

Qualifier to END OF PARTITION or BEGINNING OF PARTITION.

ILI Incorrect Length Indicator. When set to 1, indicates that the requested

logical block length did not match the logical block length of the data on the

tape medium. Only READ or VERIFY commands cause this bit to be set

to 1.

Sense Key The Sense Key values are described in Table 4-130 on page 4-220.

Information Contains the difference (residue) between the requested length minus the

actual length in bytes, blocks, or Filemarks, as determined by the command.

Negative values are indicated by two’s complement notation. The bytes are

valid for all READ, WRITE, SPACE, and VERIFY commands for which

the drive generated a CHECK CONDITION status.

Additional Sense

Length

Specifies the number of additional sense bytes to follow. If the value in the

Allocation Length field of the CDB is too small to transfer all of the

Additional Sense bytes, the Additional Sense Length is not adjusted to

reflect the truncation.

Command

Specific

Information

Command Specific Information bytes can be logged by the operating system

on error conditions. On tape medium errors, such an entry usually contains

the current SCSI logical block address (LBA).

Additional Sense

Code (ASC)

This field and the Additional Sense Code Qualifier field provide additional

information about the Sense Key and the cause of a CHECK CONDITION

status. Additional Sense Codes are listed in Table 4-131 on page 4-221.

Additional Sense

Code Qualifier

(ASCQ)

This field and the Additional Sense Code field provide additional

information about the Sense Key and the cause of a CHECK CONDITION

status. Additional Sense Code Qualifiers are discussed in Table 4-131 on

page 4-221.

1 2 ... 255 256 257 258 259 260 261 262 263 264 265 ... 293 294

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