HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
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Enabled Power Saving mode and idle time (y
1
and y
2
) are preserved until Advanced Power Management is
disabled, the deepest Power Saving mode becomes Normal Idle mode, or new time is set. They are initialized
with a hard/soft reset unless Reverting to power on defaults is disabled and the device receives a soft reset.
11.37.4.1 Low Power Idle mode
Additional electronics are powered off, and heads are unloaded on the ramp, however the spindle is still rotated
at the full speed.
11.37.4.2 Low RPM standby mode
The heads are unloaded on the ramp, and the spindle is rotated at the 60-65% of the full speed.
When Feature register is 85h (=Disable Advanced Power Management), the deepest Power Saving mode
becomes normal Idle.
11.37.5 Automatic Acoustic Management
The device preserves enabling or disabling of Automatic Acoustic Management, and the current Automatic
Acoustic Management level setting across all forms of reset, i.e., Power on, Hardware, and Software Resets.
11.37.6 Set Maximum Host Interface Sector Time
Typical PIO Mode Host Interface Sector Time (7:0)
Typical PIO Mode Host Interface Sector Time (15:8)
Typical DMA Mode Host Interface Sector Time (7:0)
Typical DMA Mode Host Interface Sector Time (15:8)
Subcommand code 43h allows the host to inform the device of a host interface rate limitation. The typical Host
Interface Sector Times have the same units as Identify Device word 96 for DMA and word 104 for PIO. A value of
zero indicates that the host interface shall be capable of transferring data at the maximum rate allowed by the
selected transfer mode. The Typical PIO Mode Host Interface Sector Time includes the host‘s interrupt service
time.
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