Re: RAID 5 disks not spinning down

[Brad Campbell <brad@wasp.net.au>]

Alexander Stockinger wrote:
> Hi all,
> 
> I have a linux software RAID 5 running on a Debian Sarge with 2.6.7-smp. 
> Since I installed the system (several kernel updates ago) the disks of 
> the RAID 5 won't stay spinned down. Having them sent to standy manually 
> using hdparm ends up in having the disks spin up within the next minute 
> or so.
> To further investigate the problem I watched the /proc/diskstats file 
> for /dev/md0 and realized that prior to the spinup a single read access 
> to the RAID is issued - consequently the disks attached to the read spin 
> up again...

Does it occur if you have the filesystem on the md device unmounted?

Regards,
Brad
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