RE: ext3 filesystem corruption on md RAID1 device

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Hi Dimitry,

> How does it happen? Do you remember any power failures happened
> previously?

I had no power failures. The first such error appears always approx. 2 minutes after booting the system. This behavior started after I moved the md RAID from two smaller Seagate disks to the currently used 1TB disks. There for my first thought was a failed disk or memory but they seem to be ok based on the SMART and memtest results.

> What mount options do you used? Probably you use default options
> which means that fs was mounted w/o barrier support. Even if was
> mounted
> with barriers, your raid driver may simply ignore it.

I use default options and software raid (mdadm). Does mdadm handle barriers correct?

> Can you please post following info:
> 1) mount options  and cat /proc/mount

/dev/md1        /               ext3            defaults                        01

bilbo:~# cat /proc/mounts 
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev tmpfs rw,relatime,size=10240k,mode=755 0 0
/dev/disk/by-uuid/a059fdf2-4ff6-4c30-ba7f-77c85e7f5d1b / ext3 rw,relatime,errors=continue,data=ordered 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,relatime,mode=755 0 0
usbfs /proc/bus/usb usbfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
/dev/mapper/vg_data-lv_video /video ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/mapper/vg_data-lv_mpg /video/film/mpg ext3 rw,relatime,errors=continue,data=ordered 0 0
rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0
automount(pid3007) /mnt/auto autofs rw,relatime,fd=4,pgrp=3007,timeout=120,minproto=2,maxproto=4,indirect 0 0
automount(pid2964) /mnt/usb autofs rw,relatime,fd=4,pgrp=2964,timeout=2,minproto=2,maxproto=4,indirect 0 0
automount(pid3062) /net autofs rw,relatime,fd=4,pgrp=3062,timeout=300,minproto=2,maxproto=4,indirect 0 0
nfsd /proc/fs/nfsd nfsd rw,relatime 0 0


> 2) Write something to your fs and sync;
>    like follows "echo test > /path_to_your_mnt/test ; sync"

Done.

> 3) dmesg log after stage(2)

Nothing got written to dmesg during step 2.

I currently have 2 of the EXT3-fs errors in dmesg but writing and syncing did not produce another one. 

Best regards,
Reiner.
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