This message is from the T13 list server.
'IDLE IMMEDIATE' never said anything about spindle state.
In fact, none of the power management commands mention spindle states.
The 'unload feature' of IDLE IMMEDIATE was created to <explicitly> make a
way
to force a rotating disk device to park the heads.
Why?
1) Vendors differentiate between themselves in their power management
strategies
and do not want to be restricted in what they can/cannot do. (and)
2) Not all ATA or ATAPI devices are rotating disk devices
Specifying 'spindle state' is meaningless to some device types.
Thank You !!!
-----------------------------------------------------------------
Jim Hatfield
Seagate Technology LLC
e-mail: [EMAIL PROTECTED]
s-mail: 389 Disc Drive; Longmont, CO 80503 USA
voice: 720-684-2120
fax....: 720-684-2711
==========================================
Pat LaVarre
<[EMAIL PROTECTED]
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Available Re: [t13] head parking
07/07/2005 04:46
AM
This message is from the T13 list server.
> an acceptable way to force an ata drive to
> park it's head immediately without spinning it down? It doesn't seem
> like the IDLE/STANDBY commands provides a way to do this, but perhaps
> there's some method that's worked for ages but just not explicitly
> documented in t13?
>
>>> 'IDLE IMMEDIATE' command in ATA/ATAPI-7
>>> ... 'unload feature' subcode ...
Sending legacy ATA 'IDLE IMMEDIATE' while active didn't already often
park without spindown?
