Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 192)

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EXB-8205 For the EXB-8205, the DCE bit settings indicate the following:

0 – Data compression is disabled. The write density is set to 14h

(8200 format).

1 – Data compression is enabled. The write density is set to 90h

(8200c format).

Byte 02, Bit 6 - DCC (Data Compression Capable)

The Data Compression Capable bit is used by the MODE SENSE

command to indicate that the CTS supports data compression. The

valuereturnedis1. ThisbitisignoredbytheCTSintheMODE

SELECT command.

Byte 03, Bit 7 - DDE (Data Decompression Enable)

When the CTS reads compressed data from tape, it automatically

decompresses the data before sending to the initiator. Data

decompression is always enabled, so this bit must be set to 1 (enable

data decompression). Note that a value of 1 is valid for any tape

format, compressed or not.

Byte 03, Bits 6 and 5 - RED (Report Exception on

Decompression)

The CTS does not report exceptions on decompression (boundaries

between compressed and uncompressed data). The valid value for

this field is 0.

Bytes 04 through 07 - Compression Algorithm

The Compression Algorithm field indicates which compression

algorithm the CTS will use to compress data from the initiator. The

only value currently supported for this field is 10h (write data using

the IDRC data compression algorithm). This is the only compression

algorithm currently supported by the CTS.

Note: Specifying a value other than 10h for this field causes the CTS

to return Check Condition status with the sense key set to

Illegal Request (5h).

10-36

EXB-8205 and EXB-8505

(Standard and XL)

510503

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

1 2 ... 187 188 189 190 191 192 193 194 195 196 197 ... 445 446

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Exabyte EXB-8205 Instruções de Operação Página 192

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