Exabyte EXB-8205 Betriebsanleitung PDF herunterladen (Seite 298)

100

101

Unrecoverable Error

If an unrecoverable media or hardware error occurs during the space

operation, the CTS terminates the SPACE command and returns

Check Condition status. The REQUEST SENSE data is set as follows:

Valid 0 or 1

Sense Key Medium Error (3h) or Hardware Error (4h)

Information

bytes

If Valid=1, indicate the difference between the requested

number of blocks, filemarks, or setmarks and the actual

number of blocks, filemarks, or setmarks spaced over. The

actual length does not include the unrecovered block.

Note: Depending on the direction of the space operation,

the Information bytes may be positive or negative (2s

complement notation), indicating how many blocks were

unreadable.

Other bits

and bytes

Depend on the error condition

When the SPACE command is terminated, the position of the CTS

depends on whether a forward or backward space was attempted:

If the error occurred during a forward space, the CTS is

positioned after the unrecovered block.

If the error occurred during a backward space, the CTS is

positioned before or after the unrecovered block.

Illegal Requests

The following conditions cause the CTS to return Check Condition

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

You attempt a forward space operation immediately after the CTS

has completed a WRITE or WRITE FILEMARKS command.

You attempt to space over setmarks on a tape written in a format

that does not support setmarks (8500, 8200c, or 8200).

22-10

EXB-8205 and EXB-8505

(Standard and XL)

510503

22 SPACE (11h)

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