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PRIO bit
The Priority (PRIO) value shall be assigned by the host based on the priority of the command issued. The device
makes a best effort to complete High priority requests in a more timely fashion than Normal and isochronous priority
requests. The device tries to complete isochronous requests prior to its associated deadline. The Priority values are
defined as follows:
00b Normal priority
01b Isochronous – deadline dependent priority
10b High priority
NCQ TAG
The TAG value shall be assigned to be different from all other queued commands. The value shall not exceed the
maximum queue depth specified by the Word 75 of the Identify Device information.
Normal Outputs
See Normal Outputs in Section 12.20 Read FPDMA Queued (60h)
Error Outputs
See Error Outputs in Section 12.20 Read FPDMA Queued (60h)
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Hard Disk Drive Specification