Hi, i have a 4x3TiB Raid 6(because it's expandable) setup using a md-raid + dm-crypt + LVM. Up to now, i never had any problems with it. A friend just told me, that SATA has an error rate of about 1 Bit each 3TiB of transmission, so a bit is written written or read wrong(but i don't know if this is correct). Worst case, one error bit leads to a corrupt raid sector(Raid 5 is able to detect the corrupt sector, but Raid 5 won't be able to correct it, correct me if i'm wrong). This corrupt sector could lead to a corrupt dm-crypt sector, which leads to an corrupt LVM sector, and so on. Finially, your filesystem could get broken. So think about using large partition with encryption. I never had trouble with my setup, but now I would set it up in some other way. Here's a nice article about it: http://subnetmask255x4.wordpress.com/2008/10/28/sata-unrecoverable-errors-and-how-that-impacts-raid/ -- Ralf On 01/16/13 12:08, Federico Foschini wrote: > Hi all, > I'm reading the FAQ on cryptsetup wiki because I'm plannig to set up a > software raid 5 (mdadm) with 3 1,5TB disks and I'm a bit scared about > memory errors. I read that a single flipped bit can lead in a massive > file corruption and I've got 2GB of non ECC ram on my machine... what > is the risk of encounter a memory error writing big files (like 8-10 > GiB)? > > -- > Federico Foschini. > _______________________________________________ > dm-crypt mailing list > dm-crypt@xxxxxxxx > http://www.saout.de/mailman/listinfo/dm-crypt _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
