Exabyte EXB-8205 Betriebsanleitung PDF herunterladen (Seite 129)

100

101

Unrecoverable Error

If an unrecoverable media or hardware error occurs during the locate

operation, the CTS terminates the LOCATE 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

logical position and the actual logical position. Note that,

depending on the direction of the locate operation, the

Information bytes may be positive or negative (2s

complement notation).

Other bits

and bytes

Depend on the error condition

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

depends on whether the locate operation was in the forward or

reverse direction, as follows:

If the error occurred during a locate operation in the forward

direction, the CTS is positioned after the unrecovered block.

If the error occurred during a locate operation in the reverse

direction, the CTS is positioned before or after the unrecovered

block.

Illegal Requests

The CTS will return Check Condition status with the sense key set to

Illegal Request (5h) if you attempt the following locate operations:

A locate operation in the forward direction immediately after the

CTS has executed a WRITE or WRITE FILEMARKS command.

A locate operation on a tape written in 8200 format.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

7-9

7 LOCATE (2Bh)

1 2 ... 124 125 126 127 128 129 130 131 132 133 134 ... 445 446

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