Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 53)

ThefollowingaredefinitionsofthestatusbytessupportedbytheCTS.

Good Status

Good status indicates that the operation specified by the CDB

completed normally. For those commands that support the

immediate return of status, Good status indicates that the CTS has

accepted the command and will attempt to perform the operation

specified by the CDB. If the specified operation does not complete

normally, Check Condition status will be reported to the initiator

when the next command is received by the CTS from the same

initiator.

Check Condition

The CTS returns Check Condition status to indicate that a situation

occurred during the execution of a command that should be checked

by the initiator. The reporting of Check Condition status is

immediate or deferred as follows:

If status for the command is to be returned when the command is

completed, Check Condition status is reported when the

condition occurs (immediate error reporting).

If status for the command was returned when the command was

initiated (that is, before the condition occurred), Check Condition

status is reported when the next command is received from the

same initiator (deferred error reporting).

If the condition occurs while the command is executing and the

CTS is disconnected from the initiator, Check Condition status is

reported to the initiator after the reconnect process.

For specific definitions that return Check Condition status, refer to the

command descriptions in Chapters 4 through 27.

Check Condition status is reported when a command is received in

the following cases:

When there is a bus parity error or format check error in a CDB.

When the command is the first command sent to the CTS after it

was reset by a SCSI bus reset or a Bus Device Reset message or

after the data cartridge was replaced. The sense key in the sense

data indicates Unit Attention (6h).

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

2-13

2 SCSI Communication

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Exabyte EXB-8205 Instruções de Operação Página 53