Exabyte EXB-8205 Betriebsanleitung PDF herunterladen (Seite 196)

Byte 03 - Active Partition

EXB-8505 If you have set the CAP bit (byte 02, bit 6) to 1 to change the active

partition, the Active Partition byte indicates the number of the new

partition that the tape is to be moved to, as follows:

0 – Move to the logical beginning (LBOP) of the second partition.

1 – Move to the logical beginning (LBOP) of the first partition.

Notes:

If the tape contains no partitions, the Active Partition byte must

be 0.

If the CAP bit is 0, the EXB-8505 ignores the Active Partition byte.

In the MODE SENSE data, the Active Partition byte indicates the

currently active partition. A value of 0 indicates that the tape

either has no partitions, or the currently active partition is the

second partition. A value of 1 indicates that the currently active

partition is the first partition.

EXB-8205 The EXB-8205 does not support partitions. The valid value for this

byte is 0.

Byte 04 - Write Buffer Full Ratio

The Write Buffer Full Ratio represents the amount of data that must

be present in the buffer during a buffered write operation before that

data is written to the tape. The value is expressed in 4-KByte

increments. The default value for this byte is 80h (512 KBytes). Valid

values range from 20h to D0h (128 to 832 KBytes).

The Write Buffer Full Ratio must equal the Read Buffer Empty Ratio

(see the following field). If these values are not equal, the CTS returns

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

Byte 05 - Read Buffer Empty Ratio

The Read Buffer Empty Ratio represents how empty the buffer must

be during a buffered read operation before additional data will be

read from the tape. The value is expressed in 4-KByte increments. The

default value for this byte is 80h (512 KBytes). Valid values range

from 20h to D0h (128 to 832 KBytes).

The Read Buffer Empty Ratio must equal the Write Buffer Full Ratio.

If these values are not equal, the CTS returns Check Condition status

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

10-40

EXB-8205 and EXB-8505

(Standard and XL)

510503

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

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Exabyte EXB-8205 Betriebsanleitung Seite 196