Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 92)

Reading Data on a Partitioned Tape

To read data, use the READ (08h) command as you would with a

standard tape. However, remember that if you want to read data in

the partition the tape is not currently in, you must use the LOCATE or

MODE SELECT command to reposition the tape to that partition.

After you have issued a command to relocate to a new partition, you

can use a LOCATE command or SPACE command to move the tape

to a legal position for reading data.

Rewinding a Partitioned Tape

When you issue a REWIND (01h) command, the EXB-8505 rewinds

the tape to the beginning of the current partition. If the tape is

positioned in the first partition, the EXB-8505 rewinds the tape to the

logical beginning of the tape (LBOT). If the tape is positioned in the

second partition, the EXB-8505 rewinds the tape to the logical

beginning of the second partition (LBOP).

If you want to rewind to LBOT and the tape is positioned in the

second partition, do not use the REWIND command. Instead, use the

LOCATE command to position the tape to the beginning of the first

partition (LBOT).

Erasing a Partitioned Tape

The ERASE command acts upon only one partition at a time. After

erasing the partition, the EXB-8505 rewinds the tape to the beginning

of that partition. To erase the data from an entire tape without

eliminating the partitions, you must erase both partitions separately.

Erasing Data From One Partition If you want to erase the data from

just one partition, use the ERASE command as you would with a

standard tape. Start from the beginning of the partition you want

to erase and issue the ERASE command. The EXB-8505 rewrites

the LBOP information, erases forward from LBOP, stops at the

end of the partition, then rewinds to LBOP. When you erase the

data from one partition, no data in the other partition is erased.

Erasing the Entire Tape If you want to erase the entire tape, first

erase one partition, use the MODE SELECT command to change

to the other partition, then erase that partition. This preserves the

partition information. Or, you can reformat the tape as a

single-partition tape, then erase the entire tape.

3-30

EXB-8205 and EXB-8505

(Standard and XL)

510503

3 Implementing CTS Operations

1 2 ... 87 88 89 90 91 92 93 94 95 96 97 ... 445 446

Sem comentários

Exabyte EXB-8205 Instruções de Operação Página 92