Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 182)

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Byte 02, Bit 0 - DCR (Disable Correction)

The DCR bit is not supported by the CTS. The valid value is 0.

Byte 03 - Read Retry Count

The Read Retry Count field specifies how many times the CTS should

attempt its read recovery algorithms before an unrecoverable read

error is reported. If the CTS fails to reread the block after this number

of attempts, it reports an unrecoverable read error. You can set the

Read Retry Count to any value between 00h and 0Bh. The default

value is 0Bh.

As soon as the CTS encounters an unreadable data block, the value for

the Read Retry Count is automatically set as follows:

If you specified 00h, the Read Retry Count is not changed. The

CTS attempts no rereads before reporting an unrecoverable read

error.

If you specified 01h, the Read Retry Count is not changed. The

CTS attempts one reread at normal speed before reporting an

unrecoverable read error.

If you specified a value from 02h to 0Bh, the Read Retry Count is

set to 02h. The CTS attempts one reread at normal speed and one

reread at slow speed before reporting an unrecoverable read error.

Notes:

In MODE SENSE data, if you receive a value from 03h through

0Bh, the CTS has not had to attempt any rereads yet. As soon as

the CTS encounters an unreadable data block, it changes the Read

Retry Count to 02h.

If you are reading a tape that may have been written without

retries (see “Write Retry Count” on the following page), issue a

MODE SENSE command and check the value returned for the

WWR (Write Without Retries) bit in the Vendor Unique

Parameters Page 2. If the WWR bit is set to 1, specify 00h for this

field; otherwise, specify a non-zero value.

10-26

EXB-8205 and EXB-8505

(Standard and XL)

510503

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

1 2 ... 177 178 179 180 181 182 183 184 185 186 187 ... 445 446

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Exabyte EXB-8205 Instruções de Operação Página 182

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