Btrfs devel - Oct 2012 - Will RAID have issues with disks that spin down?

Hi.  I know that several hardware RAID solutions have issues with disks 
that spin down when idle; the time to spin back up -- usually on the 
order of five seconds -- causes unhappy timeouts, etc.  I was wondering 
if that would be an issue with RAID a-la btrfs?

Thanks,

-Ken
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On Thu, Oct 04, 2012 at 10:36:43AM -0400, Ken D''Ambrosio
wrote:
> Hi.  I know that several hardware RAID solutions have issues with
> disks that spin down when idle; the time to spin back up -- usually
> on the order of five seconds -- causes unhappy timeouts, etc.  I was
> wondering if that would be an issue with RAID a-la btrfs?
   I have (some of(*)) the disks in my 8-drive RAID-1 btrfs array set
to spin down after 10 minutes of no use. I''ve not had a problem with
it so far. So I''d say it''s not an issue from my limited
testing.

   Hugo.

(*) Damn you, Samsung!

-- 
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key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
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On Thu, Oct 4, 2012 at 4:36 PM, Ken D''Ambrosio <ken@jots.org>
wrote:
> Hi.  I know that several hardware RAID solutions have issues with disks
that
> spin down when idle; the time to spin back up -- usually on the order of
> five seconds -- causes unhappy timeouts, etc.  I was wondering if that
would
> be an issue with RAID a-la btrfs?
I run btrfs on my home server with the disks set to spin down when
idle. One of them (a Samsung 1TB) takes a whopping 10 seconds to spin
up, but btrfs has no problem with that whatsoever.

Regards,

Bart
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