(es)ata drives may need an explicit spinup command?
Alexander Motin
mav at FreeBSD.org
Thu Aug 6 19:57:36 UTC 2009
Juergen Lock wrote:
> So I tested esata on a siis pcie card with a 750G Seagate Freeagent Pro
> drive and it does work - until the drive falls into powersave mode
> after being idle for a little while. :( (I had the drive on 1394
> before on another box where it was able to recover from this condition,
> but not on usb or esata - and the drive's 1394 interface died a while
> ago and also esata is faster anyway...)
>
> And now I came across this patch for the linux ata driver:
> http://git.kernel.org/?p=linux/kernel/git/jgarzik/libata-dev.git;a=commitdiff;h=169439c2e35f01e7832a9b4fc8a7446980c3d593;hp=1e999736cafdffc374f22eed37b291129ef82e4e
>
> So my question is, could the same be done in our ata code?
> I have a slight :) hope it would help this drive too at least as it
> does seem to work on Linux...
I am not sure it is related to your case, as you said your drive works
for some time after plug. If drive spun-down automatically due to
inactivity, it should spin-up automatically also, as OS unable to track
that transition. 30 seconds of ATA command timeout should be sufficient
for drive to do this. Do you have any other symptoms?
--
Alexander Motin
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