Re: [gentoo-amd64] Soliciting new RAID ideas

[Marc Joliet <marcec@gmx.de>]

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Am Tue, 27 May 2014 15:39:38 -0700
schrieb Bob Sanders <rsanders@sgi.com>:

> Mark Knecht, mused, then expounded:
[...]
> >    Beyond this I need to talk file system types. I'm fat dumb and
> > happy with Ext4 and don't really relish dealing with new stuff but
> > now's the time to at least look.
> >
> 
> If you change, do not use ZFS and possibly BTRFS if the system does not
> have ECC DRAM.  A single, unnoticed, ECC error can corrupt the data pool
> and be written to the file system, which effectively renders it corrupt
> without a way to recover.
[...]

As someone who recently switched an mdraid to BTRFS (with / on EXT4 on an
SSD, which will be migrated at a later point, once I feel more at ease with
BTRFS), I was curious about this, so I googled it.  I found two threads, [0]
and [3], which dispute (and most likely refute) this notion that BTRFS is more
susceptible to memory errors than other file systems.

While I am far from a filesystem/storage expert (I see myself as a mere user),
the cited threads lead me to believe that this is most likely an
overhyped/misunderstood class of errors (e.g., posts [1] and [2]), so I would
suggest reading them in their entirety.

[0] http://comments.gmane.org/gmane.comp.file-systems.btrfs/31832
[1] http://permalink.gmane.org/gmane.comp.file-systems.btrfs/31871
[2] http://permalink.gmane.org/gmane.comp.file-systems.btrfs/31877
[3] http://comments.gmane.org/gmane.comp.file-systems.btrfs/31821

HTH
-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup

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