From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: On the subject of RAID-6 corruption recovery Date: Fri, 04 Jan 2008 17:49:19 -0800 Message-ID: <477EE21F.4070505@zytor.com> References: <4774663C.5090609@zytor.com> <59840.88.217.65.202.1199491167.squirrel@www.e18.physik.tu-muenchen.de> <477EC96D.80505@zytor.com> <51481.88.217.65.202.1199493668.squirrel@www.e18.physik.tu-muenchen.de> <477ED321.6000708@zytor.com> <58669.88.217.65.202.1199496331.squirrel@www.e18.physik.tu-muenchen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <58669.88.217.65.202.1199496331.squirrel@www.e18.physik.tu-muenchen.de> Sender: linux-raid-owner@vger.kernel.org To: Thiemo Nagel Cc: Linux RAID Mailing List List-Id: linux-raid.ids Thiemo Nagel wrote: > > That's why I was asking about the generator. Theoretically, this > situation might be countered by using a (pseudo-)random pattern of > generators for the different bytes of a sector, though I'm not sure > whether it is worth the effort. > Changing the generator is mathematically equivalent to changing the order of the drives, so no, that wouldn't help (and would make the common computations a lot more expensive.) -hpa