Hitachi HDS721050CLA362 Specifications page 114

Output Parameters To The Device
Feature Current bit 7 (A/R)
Feature Current bit 6 (R/W)
Feature Current bit 0..2 (Stream ID)
Feature Previous
Sector Count Current
Sector Count Previous
HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
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.
R/W specifies a read stream if cleared to zero and a write stream
if set to one.
The Stream ID shall be a value between 0 and 7.
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))) micriseconds.
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
minimum CCTL is 50ms.CCTL is set to 50ms when the specified
value is shorter than 50ms.
Allocation Unit Size In Sectors (7:0)
Allocation Unit Size In Sectors (15:8)
110