Exabyte EXB-8205 Instrucciones de operaciones descargar pdf (Pagina 208)

100

101

Byte 02, Bit 5 - ND

This bit indicates whether the CTS can disconnect from the initiator

during the data transfer phase, as follows:

0 – The CTS can disconnect during the data transfer phase. (Power-on

default.)

1 – The CTS will not disconnect during the data transfer phase.

Restrictions when the ND bit is 1:

During a write operation, the data transfer from the initiator

does not start until the number of bytes of available space in

the CTS’s buffer is greater than or equal to the total transfer

length specified by the CDB.

During a read operation, the data transfer to the initiator does

not start until all of the data requested by the CDB is resident

in the CTS’s buffer.

If the Buffer Full Ratio and Buffer Empty Ratio (see

Section 10.9) are set to values less than A0h or greater than

C0h, they will be changed to A0h. This is necessary for proper

buffer management.

The Maximum Burst Size field (see Section 10.9) has

precedence over the ND bit. For this reason, if the Maximum

Burst Size has already been set to a non-zero value,

attempting to set the ND bit to 1 causes the CTS to return

Check Condition status with the sense key set to Illegal

Request.

Byte 02, Bit 3 - NBE (No Busy Enable)

This bit is included for EXB-8200 compatibility only. This bit is set to 1

in the MODE SENSE data and is ignored by the CTS in the MODE

SELECT command.

10-52

EXB-8205 and EXB-8505

(Standard and XL)

510503

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

1 2 ... 203 204 205 206 207 208 209 210 211 212 213 ... 445 446

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Exabyte EXB-8205 Instrucciones de operaciones Pagina 208

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