Exabyte EXB-8205 Betriebsanleitung PDF herunterladen (Seite 124)

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7.2 Field Definitions

Byte 01, Bit 2 - BT (Block Type)

TheBTbitdeterminesthetypeofblocknumbercontainedinthe

Block Address field (bytes 03 through 06), as follows:

0 – The Block Address field contains the SCSI logical block number,

numbered sequentially from the beginning of the tape (or the

beginning of the partition for a dual-partition tape in 8500c

format).

1 – The Block Address field contains an Exabyte-unique block address

(currently not implemented).

Byte 01, Bit 1 - CP (Change Partitions)

EXB-8505 For a dual-partition tape, the CP bit causes the EXB-8505 to move to

the partition specified by the Partition field (byte 08) before

positioning to the requested block, as follows:

0 – Ignore the Partition field. That is, do not move the tape from the

current partition.

1 – Move to the partition specified in the Partition field.

Note: If the tape contains just one partition, the CP bit must be 0.

EXB-8205 The EXB-8205 does not support multiple partitions. This bit must be 0.

Byte 01, Bit 0 - Immed

The Immed bit is used to determine when command status is

returned to the initiator.

0 – Status is reported to the initiator when the LOCATE command is

completed.

1 – Status is reported to the initiator when the LOCATE command is

initiated by the CTS.

7-4

EXB-8205 and EXB-8505

(Standard and XL)

510503

7 LOCATE (2Bh)

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