Hitachi HDS723020BLA642 Specifications page 232

Output Parameters To The Device
Sector Count Timeout Parameter. If zero, the timeout interval (Standby Timer) is NOT disabled. If
non-zero, then the automatic power down sequence is enabled, and the timeout
interval is shown blow:
When the automatic power down sequence is enabled, the drive will enter Standby
mode automatically if the timeout interval expires with no drive access from the host.
The timeout interval will be reinitialized if there is a drive access before the timeout
interval expires.
Value
------------
1-240
241-251
252
253
254
255
Hitachi hard disk drive specifications
232
Description
-------------------------------
0 Timer disabled
Value * 5
(Value-240) * 30 minutes
21 minutes
8 hours
Aborted
21 minutes 15 seconds
seconds