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SCSI Commands

5-156 Quantum DLT 4000 Tape Drive

VERIFY Command (13h) (continued)

Table 5–77 VERIFY Command Data - Field Descriptions

Field Name Description

Immed Immediate. When set to 1, the VERIFY command completes before

any tape medium movement is done (that is, when the processing

has been initiated.

BC Byte Check. When set to 0, the tape drive performs an internal

CRC/ECC check of data. No data is transferred to the initiator.

When set to 1, the command is rejected.

Fixed This bit specifies whether fixed-length or variable-length blocks are to

be verified.

When set to 0, variable-block mode is requested. A single block is

transferred with the Verification Length specifying the maximum

number of bytes the initiator has allocated for verification.

When the Fixed bit is set to 1, the Verification Length specifies the

number of blocks to be verified. This is valid only if the logical unit is

currently operating in Fixed Block mode.

Verification Length This field specifies the amount of data to verify, in blocks or bytes as

indicated by the Fixed bit.

1 2 ... 251 252 253 254 255 256 257 258 259 260 261 ... 299 300

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Quantum DLT 4000 Manual Pagina 256