Messages in this thread | | | Date | Tue, 30 Dec 2008 08:20:26 -0600 | From | Matt Garman <> | Subject | Re: mismatch_cnt, random bitflips, silent corruption(?), mdadm/sw raid[156] |
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On Thu, Dec 25, 2008 at 01:04:07PM -0500, Justin Piszcz wrote: > Options/alternatives for maintaining data integrity? > > 1. Obviously DVD and/or LTO-tape (multiple copies of data at rest) > http://epoka.dk/media/Linear_Tape_Open_(LTO)_Ultrium_Data_Cartridges.pdf > -> For LTO-2/LTO-3 > -> Uncorrected bit error rate 1x10-17 1x10-17 > -> Undetected bit error rate 1x10-27 1x10-27 > > 2. ZFS, but only runs in user-space in Linux. > > 3. Keep an md5sum for each file on the filesystem and run daily > checks?
I've recently started using par2[1][2] on backed up files.
I just started doing this, so don't know how it will work in the long run. Can't hurt, anyway, other than taking up more space.
[1] http://www.par2.net/ [2] http://parchive.sourceforge.net/
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