Hitachi HDS721050CLA362 Specifications page 197

Y =(x-40h) * 60 + 600[sec]
2
When Low RPM standby mode is the deepest Power Saving mode and the value in Sector Count register is
between 01h and 3Fh,
120<=Y <=435 [sec] (default: 120 [sec])
1
Y =600 [sec]
2
where x is the value in Sector Count register, y
to Low RPM standby mode.
If Low power idle mode has already been enabled (i.e., y
enabled, y is preserved. If Low power idle mode is disabled (i.e., y
1
when Low RPM standby mode is enabled.
HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
(600<=Y <=4380)
2
is the idle time to Low Power Idle mode, and y
1
1
193
has been set) before Low RPM standby mode is
has not been set yet), y
1
is the idle time
2
becomes 120[sec]
1