Hi, I've been using btrfs for a while now, I've been utilizing snapshotting
nightly/weekly/monthly.  During the weekly I also do a backup of the
filesystem to an ext4 filesystem.  My storage is a linux md raid 5 volume. 
I've recently noticed these errors in the logs during the backup of the
files to the ext4 filesystem.  I am running RHEL 6.1
(2.6.32-131.0.15.el6.x86_64)

I'd like to help in any way I can so I thought I'd post here to see if there
is anything I can do to help.

Thanks, Mike

PS I'm new to helping on an opensource project!

kernel: btrfs: dm-1 checksum verify failed on 759414784 wanted 52BAE689
found 827C3140 level 0
kernel: btrfs no csum found for inode 168597 start 82202624
…
kernel: btrfs no csum found for inode 168597 start 84520960
kernel: __ratelimit: 2267 callbacks suppressed
kernel: btrfs no csum found for inode 170122 start 3772416
…
kernel: btrfs no csum found for inode 170123 start 1720320

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