linux-ext4 - ext4 corruption on 17TB file system during power cycle test

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Date:	Wed, 13 Jun 2012 13:49:29 +0000
From:	Ming Lei <Ming.Lei@...erbed.com>
To:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: ext4 corruption on 17TB file system during power cycle test

I  have raid0 on 12 Seagate new 3TB sas drives and kernel version is 2.6.32SL6.1 version. The ext4 is mounted with barrier on, delalloc on/off has almost the same result.

I ran fs_mark -F -t 10 -D 1000 -N 1000 -n 1000000 -s 40 -S 2 into 4 iterations(reported count of 40000000) and then power cycled the box. After the box came up, I ran fsck -f to check inconsistency. On ext4 FS 7.5TB and 16TB, I got no fsck error; but on 17TB, 21TB and 33TB, I got big chunk of fsck errors.

My question is: is this known issue and any fix?
Thanks
M-
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