Quantum 1200 Series DAT Autochanger Betriebsanweisung PDF herunterladen (Seite 133)

SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-91

Synchronous

Transfer Timeout

Indicates the maximum amount of time, in 1 msec increments, that the

drive waits before generating an error by performing an unexpected BUS

FREE operation. The drive enters the BUS FREE phase only if one of the

following events causes the timer, after it is started, not to reset or reload

before it expires:

• If there is a REQ transition when there are no outstanding REQs

waiting for an ACK, load and start the timer.

• If there is a REQ transition when there are any outstanding REQs

waiting for an ACK, there is no effect on the timer.

• If there is an ACK transition when there are outstanding REQs waiting

for an ACK, load and start the timer.

• If, after an ACK transition, there are no outstanding REQs waiting for

an ACK, stop the timer.

A value of 0000h indicates that this functionality is disabled. A value of

FFFFh indicates an unlimited timeout period.

Table 4-54. Port Control MODE SELECT Page — Field Descriptions (Continued)

Field Name Description

1 2 ... 128 129 130 131 132 133 134 135 136 137 138 ... 293 294

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