Kasimir Müller wrote:
> Hi Tejun,
> 
> Old communication appended below.
> 
> I wish you a Happy Xmas and a successful New Year.
> 
> I spent some time during Christmas to further investigate the problem. I
> bought a new 500GB disk and put all data on this disk.
> This is also contineously watched by nagios and cacti
> Then
> 1.) All 5 disks in the external case connected via Portmapper and sil24
> card have excellent health-status with smartd.
> 2.) I get no(!!!!) errors at all if I use the disks as single drives or
> with lvm. I verified this by copying large amounts of data (100-200GB)
>      with rsync , cp-av and running bonnie++ single and simultaneously 
> to  various combinations of drives.
> 3.) I get the errors as soon as I use raid. Same errors with raid0 (2
> disks), 1 (2 disks), 5 (3 disks) in any combination of the drives
> 4.) The errors appear usually first during mkfs (same with ext3 and
> reiserfs) and than
>      after writing about 10-50 GB to the raid, and repeat then at 5 to
> 10 minute intervals according the disk activity.
> 5.) I used Kernel 2.6.23.1 with Your latest patch: same result
> 6.) I used kernel 2.6.24 patch rc-6 : same result
> 7.) during the tests I marked all files with md5-sums:  No data
> corruption (!!!), so maybe I can live with it.

Please apply the attached patch on top of 2.6.24-rc6 and report whether
anything changes.

Thanks.

-- 
tejun