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SCSI Description
Maxtor Atlas 10K III 5-5
Command Descriptor Block Control Field-Field Descriptions
Vendor Specific Bits These bits must be 0.
NACA Normal Auto-Contingent Allegiance - This bit
to indi-
cate that SCSI-2 Contingent Allegiance rules apply.
Link Bit
A Link bit set to one signals that the initiator requests continuation
of a task
(I/O Process) across two or more SCSI commands. If the Link bit is
one and the flag bit is zero, and the command completes success-
fully, the drive will continue the task and return a status of INTER-
MEDIATE and a service response of Linked Command Complete.
If the Link bit and the Flag bit of the Control word are both set to
one, and the drive completes a command with a status of INTERME-
DIATE, the drive will return a service response of Linked Command
Complete (with Flag). Refer to Section 5.6 for Linked Commands de-
scription.
Flag Bit
The Flag bit is used in conjunction with the Link Bit to notify the ini-
tiator in an expedient manner that a command has been completed.
Aflag bit set to 1 is valid only when the Link Bit is set to 1.