Re: mismatch_cnt, random bitflips, silent corruption(?), mdadm/sw raid[156]
From: Matt Garman <hidden>
Date: 2008-12-30 14:20:43
Also in:
linux-xfs, lkml
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/