Quantum L200 Guía de usuario descargar pdf (Pagina 71)

Chapter 5 SCSI Interface

SCSI Message System

Quantum|ATL PowerStor L200 Series Library User’s Guide 55

Table 12 Status

Bytes

The Test Unit Ready command is used to determine whether

the library would accept, for example, a Move Medium or

Position command without returning a CHECK CONDITION

status.

Status Byte Description

GOOD (00) This status indicates the library successfully

completed the command.

CHECK

CONDITION

(02)

A contingent allegiance condition occurred. The

REQUEST SENSE command should be sent

following this status to determine the nature of

the event.

BUSY (08) The target is busy. This status is returned

whenever the device is unable to accept a

command from an otherwise acceptable initiator.

The initiator should reissue the command at a

later time.

INTERMEDIATE

GOOD (10h)

This status is returned instead of GOOD status for

commands issued with the LINK bit set.

Following the return of this status, the library

will proceed to the COMMAND phase for the

transfer of the next linked command.

RESERVATION

CONFLICT

(18h

This status is returned by the library whenever a

SCSI device attempts to access the library when it

has been reserved for another initiator with a

RESERVE UNIT command.

COMMAND

TERMINATED

(22h)

This is the status returned for a command that

was terminated by a TERMINATE I/O PROCESS

message. This status also indicates that a

contingent allegiance condition has occurred.

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