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SCSI Commands: 14BSCSI Command Descriptor Blocks
Page
25
3.2.2
SCSI Command Operation Code Format
Byte
Bits
7 6 5 4 3 2 1 0
0
Group Code
Command Code
3.2.2.1
SCSI Command Field Descriptions
Field Byte
Bits
Description
Group
Code
0
5-7
The SCSI command group.
Command
Code *
0
0-4
The SCSI command code.
NOTE: The Group Code and Command Code together make the Operation Code.
3.2.3
SCSI Command Control Byte Format
Byte
Bits
7 6 5 4 3 2 1 0
Last
Vendor Unique
Reserved
NACA
Flag
Link
3.2.3.1
SCSI Command Control Byte Field Descriptions
Field Byte
Bits
Description
Vendor
Unique
Last
6-7
Not used, always 0.
Reserved
Last
3-5
All reserved bits must be 0.
NACA
Last
2
Parallel SCSI Interface: Not supported; reserved.
Fibre Channel Interface: Supported.
Flag and
Link bits
Last
0-1
These bits are not supported by the LTO drive.
Summary of Contents for LTO 4
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