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...
In order to find the reason for that read I did a dnotify on the mount point of the RAID - however this didn't show ANY file read at all when this single read access occurs.
I also tried noflushd - it simply keeps segfaulting after a few seconds. Plus I'd be happy to resolve the issue in the first place instead of fixing the symptoms anyway...
Any ideas what to do?
Thanks, Alex
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