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SCSI Commands

5-190 Quantum DLT 8000 Tape System

REQUEST SENSE Command (03h) (continued)

Table 5–87 REQUEST SENSE Data — Field Descriptions

Field Name Description

Valid When set to 1, this field indicates that the information bytes contain

valid information as defined in the ANSI SCSI-2 specification.

Error 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.

Segment Number This value of this byte is always 0.

Filemark This bit indicates that the current command has read a Filemark.

EOM End of Medium. This bit 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

Qualifier to End of Partition or Beginning of Partition.

ILI Incorrect Length Indicator. This bit 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 may cause this bit to

be set.

Sense Key In most cases, Additional Sense Code and/or Qualifier information is

available. The codes and qualifiers are covered in detail in Table 5-89.

Information Bytes These bytes contain the differences (residue) of 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 tape commands for which a CHECK CONDITION status

has been generated. The information bytes are 0 for MODE SELECT /

SENSE, INQUIRY, READ BLOCK LIMITS, and TEST UNIT READY.

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Quantum DLT 8000 Manual Pagina 334