Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 195)

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Byte 02, Bit 5 - CAF (Change Active Format)

The CAF bit indicates that the active format is to be changed and to

use the values in the Active Format field, as follows:

0 – Do not change active format.

1 – Change active format.

In the MODE SENSE data, the value returned for this bit is always 0.

Byte 02, Bits 4 through 0 - Active Format

The Active Format field contains data that modifies the media format

parameters. The bit definitions for the Active Format field are as

follows:

43210

Reserved Gap Threshold

Byte 02, Bits 2 through 0 - Gap Threshold The Gap Threshold field

specifies the maximum number of consecutive gap blocks that the

CTS will write on the current track while determining whether an

empty buffer exists during a write operation. After writing the

number of gap blocks specified by this field, the CTS either

continues the write operation (if there is new data in the buffer) or

begins the process to stop tape motion (if the buffer is still empty).

Before actually stopping tape motion, the CTS writes additional

gap blocks to complete the current track and then writes one or

two complete gap tracks. (See the EXB-8205 and EXB-8505 Product

Specification for more information.)

Valid values for the Gap Threshold field are 0h to 7h. The default

value for the Gap Threshold byte is 7h.

Note: The Gap Threshold in the Device Configuration Page has

the same function as the Gap Threshold in the Vendor

Unique Parameters Page 1. If both pages are sent, the

value that is received last by the CTS takes precedence.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

10-39

10 MODE SELECT (15h) andMODE SENSE (1Ah)

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