corrupted ext4 1000gb filesystem (2.6.32, debian stable)

[Luke Kenneth Casson Leighton]

folks, hi,

i set up a 1000gb RAID1 mirrored filesystem, possibly in a foolish way
(multiple external USB drives) and had not added a fsck check to the
script which dynamically assembles the drives.  naively and yet
happily i followed this advice, here:

http://lists.debian.org/debian-user/2011/06/msg02164.html

the problem was that uh, yeah, the ext4 filesystem _did_ end up
getting massively corrupted, very very quickly (within weeks), and i
don't entirely know how.  at approx 50% filled, i carried out another
copy operation of several tens of thousands of files (backup of a
system with about 10gb usage) and it was these files and directories
that had the worst level of filesystem corruption.

so my question is: has anyone else encountered significant filesystem
corruption of large (1000gb+) ext4 filesystems, with any *recent* 2.6
linux kernels?

tia,

l.

p.s. yes fsck has now been added to the drive assembly script, but i
am not yet filled with confidence that everything will be hunky-dory.
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