Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 270)

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Byte 13 - Additional Sense Code Qualifier (ASCQ)

The Additional Sense Code Qualifier, in conjunction with the

Additional Sense Code (byte 12), provides additional information

about each sense key. Appendix E lists the possible combinations of

this byte and the ASC byte for each sense key. Only those ASCQ

values used by the CTS are shown in the appendix.

Bytes 14 and 15 - Reserved

These bytes are reserved.

Bytes 16 through 18 - Read/Write Data Error Counter

The Read/Write Data Error Counter is a dual-function counter for

logging rewrites and read ECCs for recovered physical blocks

(physical block size is 1 KByte). The mode of operation determines

what is being counted. The counter is incremented in write mode

when a specific physical block is rewritten following a

read-after-write failure. The counter is incremented in read mode

when the physical block was reconstructed in the formatter by the

Error Correction Code (ECC) operation.

The counter is reset to 0 after any of the following:

A REQUEST SENSE command is issued with the CLRCNT bit

(byte 05, bit 7) set to 1. Note that in order for the reset to be

performed, 29 (1Dh) bytes of sense data must be read by the

REQUEST SENSE command.

The tape is loaded or rewound.

The mode changes from write to read or from read to write.

The CTS is reset.

The counter does not roll over from FFFFFFh to 0 but remains at

FFFFFFh until reset.

18-8

EXB-8205 and EXB-8505

(Standard and XL)

510503

18 REQUEST SENSE (03h)

1 2 ... 265 266 267 268 269 270 271 272 273 274 275 ... 445 446

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Exabyte EXB-8205 Instruções de Operação Página 270

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