155
Western Digital Hard Disk Drive OEM Specification
Output Parameters To The Device
Feature Current
Subcommand (bits 3-0)
When bits(3:0) is 0h, Abort NCQ Queue Abort Subcommand.
Subcommand Specific
(bits 7-4)
Abort Type, bit(7:4), describes the action requested. The NCQ NON-DATA Log (see
9.17.4.3 Read Log Ext Log Page 12h) provides a list of abort types supported by the
device. The value of Abort type are defined in the below the table.
Feature Previous
Sector Count Current
TAG (bits 7-3)
The TAG value is assigned to be different from all other queued commands. The
value does not exceed the maximum queue depth specified by the Word 75 of the
Identify Device information.
Sector Count Previous
Sector Number Current
TTAG (bits 7-3)
The TTAG field contains the value of the TAG of the outstanding command that is
requested to be aborted. The TTAG value is only valid when the Abort Type field is
set to 3h (Abort Selected). TTAG does not exceed the value specified in IDENTIFY
DEVICE word 75.
Cylinder Low Current
Cylinder Low Previous
Cylinder High Current
Cylinder High Previous
Device/Head
Input Parameters From The Device
Sector Number (HOB=0)
Sector Number (HOB=1)
Cylinder Low (HOB=0)
Cylinder Low (HOB=1)
Cylinder High (HOB=0)
Cylinder High (HOB=1)
Abort Type Parameters
Abort Type Abort Type
Description
0h
Abort All
The device attempts to abort all outstanding NCQ commands.
1h
Abort Streaming
The device attempts to abort all outstanding NCQ Streaming commands. All
non-streaming NCQ commands are unaffected.
2h
Abort Non-Streaming
The device attempts to abort all outstanding NCQ Non-Streaming
commands. All NCQ Streaming commands are unaffected.
3h
Abort Selected
The device attempts to abort the outstanding NCQ command associated
with the tag represented in TTAG field.
Table 128 Abort Type Field
