On Thu, 30 Jul 2009 10:04:42 +0200, Clemens Fruhwirth wrote: >On Wed, Jul 29, 2009 at 11:21 AM, Brett Hewes<j1252621@xxxxxxxxx> wrote: >> Hi, >> >> I found your e-mail in the the dm-crypt.c source code. The current >> implementation of crypt_iv_plain_gen() is limited by 32 bits. The xts-plain >> mode can be used only for drives < 2 Terabytes. I think the current plain >> mode should be renamed to plain32 and the new plain mode should support >> 64-bit sector number. > >What does it do for 2 TB partitions? Die painfully, or silently >overflow? Not something I've tried (I don't have that kind of storage atm!), though looking at the code it's masked with 0xffffffff, so I'd expect it to silently reset back to 0 >If the former is the case, we can rule out that there >existing installations and go ahead with that. If it's the latter >case, we can not change the semantics of an existing keyword, as this >would corrupt people's data after the 2TB boundary. i.e. plain and plain64 instead of plain32 and plain Sounds reasonable as long as it's clearly documented, which shouldn't be a problem. -- Sarah Dean FreeOTFE site: http://www.FreeOTFE.org/ Personal site: http://www.SDean12.org/ For information on SecureTrayUtil, Shredders, On-The-Fly Encryption (OTFE) systems, etc, see the URLs above. --------------------------------------------------------------------- dm-crypt mailing list - http://www.saout.de/misc/dm-crypt/ To unsubscribe, e-mail: dm-crypt-unsubscribe@xxxxxxxx For additional commands, e-mail: dm-crypt-help@xxxxxxxx
