Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 248)

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15.1 About This Command

The READ POSITION command reports the CTS’s current logical

position but does not cause tape motion to occur. As described in

Chapter 7, the READ POSITION command is intended to be used

with the LOCATE (2Bh) command to enable you to position the tape

at a specified logical block address.

Notes:

The READ POSITION command is not supported for tapes

written in 8200 format and will result in Check Condition status

with the sense key set to Illegal Request (5h).

If you issue a READ POSITION command when no data cartridge

is loaded, the CTS returns Check Condition status with the sense

key set to Not Ready (2h). The ASC and ASCQ fields are set to

3Ah and 00h.

15.2 Field Definitions

Byte 01, Bit 0 - BT (Block Type)

The BT bit determines the type of block number to be returned to the

initiator, as follows:

0 – The SCSI logical block number is returned, numbered sequentially

from the beginning of the tape or from the beginning of each

partition if the tape is formatted with two partitions (8500c format

only).

1 – An Exabyte-unique block number is returned (currently not

implemented).

Byte 09, Bits 7 and 6 - Vendor Unique

There are no vendor unique definitions for this command.

15-2

EXB-8205 and EXB-8505

(Standard and XL)

510503

15 READ POSITION (34h)

1 2 ... 243 244 245 246 247 248 249 250 251 252 253 ... 445 446

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Exabyte EXB-8205 Instruções de Operação Página 248

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