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Western Digital Hard Disk Drive OEM Specification
Output Parameters To The Device
Feature Current bit 7 (A/R)
If set to one, a request to add a new stream.
If cleared to zero, a request to remove a previous configured stream is
specified.
Feature Current bit 6 (R/W)
R/W specifies a read stream if cleared to zero and a write stream if set
to one.
Feature Current bit 0..2 (Stream ID)
The Stream ID shall be a value between 0 and 7.
Feature Previous
The default Command Completion Time Limit (CCTL).
The value is calculated as follows:
(Default CCTL) = ((content of the Features register)* (Identify
Device words (99:98))) microseconds.
This time shall be used by the device when a streaming command with
the same stream ID and a CCTL of zero are issued. The time is
measured from the write of the command register to the final INTRQ for
command completion. The device has minimum CCTL value. When the
specified value is shorter than the minimum value, CCTL is set to the
minimum value. Actual minimum CCTL value is described in the
“Deviations from Standard” section.
Sector Count Current
Allocation Unit Size In Sectors (7:0)
Sector Count Previous
Allocation Unit Size In Sectors (15:8)
