Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 58)

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Save Data Pointer (02h)

The CTS sends the Save Data Pointer message to direct the initiator to

save a copy of its present active data pointer for the CTS.

Restore Pointers (03h)

The CTS sends the Restore Pointers message to direct the initiator to

restore the most recently saved data pointers for the currently

attached LUN to the active state. Pointers to the Command, Data, and

Status locations for the LUN are restored to the active pointers.

Command and Status pointers are restored at the beginning of the

present command and status areas. The data pointer is restored to the

value at the beginning of the data area or the most recent Save Data

Pointer value.

Disconnect (04h)

The CTS sends the Disconnect message to inform the initiator that the

present physical path will be broken (the CTS will disconnect by

releasing the BSY signal) and that a later reconnect is required to

complete the current operation. If the disconnect privilege has been

granted by the initiator, the CTS can send this message at any time

after receiving the CDB (except as restricted by the ND bit of the

MODE SELECT command).

If the CTS does not send either the Disconnect message or the

Command Complete message before going to the Bus Free phase

(other than as a result of the reset condition), one of the following

situations has occurred:

A catastrophic error condition has occurred for the current

command

The initiator aborted the command

Note: The Disconnect message should not cause the initiator to save

the data pointer.

2-18

EXB-8205 and EXB-8505

(Standard and XL)

510503

2 SCSI Communication

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Exabyte EXB-8205 Instruções de Operação Página 58

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