Hi Frederico, impossible to quantify, and you may also get errors in the busses, controller and (very rare unless overclocked) CPU. The thing about "massive file corruption" is a myth though: Most flipped bit just lead to a flipped bit because they happen before encryption. Even after encryption, you lose only one 512 byte sector per flipped bit. What you do is, if this is critical, _underclock_ everything in your machine by 10-20%, get ECC RAM, ensure good cooling and clean power. Before undercklocking, test the machine extensively at 100% speed or maybe even 110% or the like. An alternative is to verify each write. Here you have to be careful to empty all buffers and caches before doing it. That is what I do for large files. Arno On Wed, Jan 16, 2013 at 12:08:15PM +0100, 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 -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@xxxxxxxxxxx GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision. -- Bertrand Russell _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
