* T500 cdrom drive never stops spinning until mount.
@ 2010-05-12 2:35 Nick Bowler
2010-05-12 13:19 ` Nick Bowler
2010-05-13 1:02 ` Robert Hancock
0 siblings, 2 replies; 4+ messages in thread
From: Nick Bowler @ 2010-05-12 2:35 UTC (permalink / raw)
To: linux-kernel, linux-ide
The ThinkPad T500 has a SATA cdrom drive attached to an Intel ICH9M/M-E
SATA ACHI controller. Upon inserting a disk into this drive, if sr-mod
is loaded, the disk will never stop spinning by itself: it will spin up
to full speed, then start slowing down, but just before it stops, it
will spin up to full speed, then start slowing down, ad infinitum.
If sr-mod is not loaded, the disk stops spinning right after insertion.
It is only possible to remove sr-mod when the disk is spinning at full
speed (all other times the module is in use), and then the disk stops.
Mounting the disk also causes it to stop spinning (and it remains
stopped after unmounting it).
I see this behaviour with both 2.6.32 and 2.6.34-rc7.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: T500 cdrom drive never stops spinning until mount.
2010-05-12 2:35 T500 cdrom drive never stops spinning until mount Nick Bowler
@ 2010-05-12 13:19 ` Nick Bowler
2010-05-13 1:02 ` Robert Hancock
1 sibling, 0 replies; 4+ messages in thread
From: Nick Bowler @ 2010-05-12 13:19 UTC (permalink / raw)
To: linux-kernel, linux-ide
On 22:35 Tue 11 May , Nick Bowler wrote:
> Mounting the disk also causes it to stop spinning (and it remains
> stopped after unmounting it).
Sorry, this was a lie. As soon as the disk spins up again after
unmounting (or if it was unmounted while still spinning), it will
continue to spin forever.
--
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: T500 cdrom drive never stops spinning until mount.
2010-05-12 2:35 T500 cdrom drive never stops spinning until mount Nick Bowler
2010-05-12 13:19 ` Nick Bowler
@ 2010-05-13 1:02 ` Robert Hancock
2010-05-13 13:04 ` Nick Bowler
1 sibling, 1 reply; 4+ messages in thread
From: Robert Hancock @ 2010-05-13 1:02 UTC (permalink / raw)
To: Nick Bowler; +Cc: linux-kernel, linux-ide
On 05/11/2010 08:35 PM, Nick Bowler wrote:
> The ThinkPad T500 has a SATA cdrom drive attached to an Intel ICH9M/M-E
> SATA ACHI controller. Upon inserting a disk into this drive, if sr-mod
> is loaded, the disk will never stop spinning by itself: it will spin up
> to full speed, then start slowing down, but just before it stops, it
> will spin up to full speed, then start slowing down, ad infinitum.
>
> If sr-mod is not loaded, the disk stops spinning right after insertion.
> It is only possible to remove sr-mod when the disk is spinning at full
> speed (all other times the module is in use), and then the disk stops.
>
> Mounting the disk also causes it to stop spinning (and it remains
> stopped after unmounting it).
>
> I see this behaviour with both 2.6.32 and 2.6.34-rc7.
Is something like hal, devicekit, etc. accessing the drive in this case?
Can you try a minimal boot with no unnecessary processes and see if the
same thing happens?
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: T500 cdrom drive never stops spinning until mount.
2010-05-13 1:02 ` Robert Hancock
@ 2010-05-13 13:04 ` Nick Bowler
0 siblings, 0 replies; 4+ messages in thread
From: Nick Bowler @ 2010-05-13 13:04 UTC (permalink / raw)
To: Robert Hancock; +Cc: linux-kernel, linux-ide
On 19:02 Wed 12 May , Robert Hancock wrote:
> Is something like hal, devicekit, etc. accessing the drive in this case?
> Can you try a minimal boot with no unnecessary processes and see if the
> same thing happens?
Good call, booting with init=/bin/zsh and sure enough, the cd drive
spins down. Looks like udev is causing the constant spin-ups, so I'll
post to linux-hotplug instead.
Sorry for the noise,
--
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
^ permalink raw reply [flat|nested] 4+ messages in thread
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2010-05-12 2:35 T500 cdrom drive never stops spinning until mount Nick Bowler
2010-05-12 13:19 ` Nick Bowler
2010-05-13 1:02 ` Robert Hancock
2010-05-13 13:04 ` Nick Bowler
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