SCSI Commands
Quantum DLT 8000 Tape System
5-219
5.30 VERIFY Command (13h)
The VERIFY command directs the tape drive to verify one or more blocks beginning with
the next block on the tape. Both CRC and EDCs are validated.
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (13h)
1
Logical Unit Number
Reserved
Immed
BC
Fixed
2 - 4
(MSB)
Verification Length
(LSB)
5
Unused
Reserved
Flag
Link
Figure 5–101 VERIFY Command Descriptor Block — Data Format
Table 5–100 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.
Summary of Contents for DLTtape DLT 8000
Page 1: ...DLTTM 8000 Tape System Product Manual Nov 10 2003 81 60118 06...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued...
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Page 26: ...Table of Contents xxiv Quantum DLT 8000 Tape System...
Page 36: ...About This Manual Quantum DLT 8000 Tape System xxxii...
Page 54: ...General Description and Specifications 1 18 Quantum DLT 8000 Tape System...
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Page 376: ...Appendix A Definition of Vendor Unique Sense Data Information A 4 Quantum DLT 8000 Tape System...
Page 386: ...Appendix C Updating the Firmware C 6 Quantum DLT 8000 Tape System...
Page 396: ...Appendix E Visual Inspection Procedure for DLTtape Cartridges E 8 Quantum DLT 8000 Tape System...
Page 406: ...Appendix G DLT 7000 Emulation Feature G 8 Quantum DLT 8000 Tape System...
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