Hi!
I'm experiencing data corruption in the following setup:
1. mdadm --create /dev/md0 -n3 -lraid5 /dev/hda1 /dev/hdc1 /dev/hde1
2. cryptsetup -c aes-cbc-essiva:sha256 luksFormat /dev/md0 mykey
3. cryptsetup -d mykey luksOpen /dev/md0 cryptvol
4. pvcreate /dev/mapper/cryptvol
5. vgcreate vg0 /dev/cryptvol
6. lvcreate -n root -L10G vg0
7. mkreiserfs -q /dev/vg0/root
8. mkdir /.newroot; mount /dev/vg0/root /.newroot
9. mkdir /.realroot; mount -o bind / /.realroot
10. tar cf - -C /.realroot|tar xvpf - -C /.newroot
My rootfilesystem has ~4.8GB of data.
After copying 2-3GB of the root-filesystem's data i'm starting to get
warnings from ReiserFS about data corruptions (I don't have the exact
messages available; they're probably not interesting anyway).
It usually happens when tar is extracting an a linux kernel build tree.
I've also got a second LVM volume in that volume group. While copying
the root-filesystem onto the new LVM volume ("root") i also copied
over 100GB+ worth of data (mainly mp3s and 15mb rar files ;) onto
another LVM volume in the same group. No data corruption occured on
that volume; at least none that I'm aware of.
After seeing these messages about the corruptions on the new
root-filesystem I recreated it from scratch and started to copy over
things once again. It keeps getting corrupt!
What's going on? Is anyone investigating this?
There's thread from May 2006 with a similar (same?) issue here:
http://article.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/1668
Previously i was running both raid1/dm-crypt/lvm/reiserfs and
raid0/dm-crypt/lvm/reiserfs with no problems (again; none that i know
of).
If it's of any help;
* Two of the IDE drives involved in my raid5 setup are connected to
the on-board IDE channels (nForce2 chipset) and the third on a Sil0680
PCI card).
* The RAID5 volume was rebuilding during the copying
* LVM and RAID5 support is built into the kernel.
* I'm running Gentoo; CFLAGS are -O2 -march=pentium-pro
* Kernel compiled with high-mem support (although the machine
currently has less than 1GB of RAM)
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