[ltp] T500, Seagate drive, "UNLOAD FEATURE"

[Michael Gaber]

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Mircea Gherzan schrieb:
> Hi,
> 
> My T500 came with a Seagate Momentus ST9250827AS drive. Having a
> vanilla 2.6.28 with UNLOAD FEATURE support, I was shocked to find out
> there's no unload_heads entry in sysfs for my drive.
> 
> To double-check, I added some printk's in ata.h to see the ATA major ID
> and the content of the ATA CFSSE word [1].
> 
> If the drive can't park the heads on request, how does TAPS/HDAPS work
> on Windows? Or is it just marketing???
> 
> Has anyone encountered this issue?
> 
> 
> Thanks,
> Mircea
> 
> [1]
> http://www.thinkwiki.org/wiki/Installing_Debian_Sid_on_a_ThinkPad_T500#Hard_drive_making_hdapsd_useless
> 

Hi.

I'm not sure, but i think i read something that the eagate-HDDs don't
have this feature, BUT have an accelerometer themselves and do that
stuff in the firmware (which should make it considerably faster)

Michael

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