Nice... More on sector checksum --
* anything prior to 2005 would be sort of out-of-date/fashion, because http://www.patentstorm.us/patents/6952797/description.html * the software RAID - NetApp view http://pages.cs.wisc.edu/~krioukov/ParityLostAndParityRegained-FAST08.ppt * the Linux view http://www.nber.org/sys-admin/linux-nas-raid.html best, z ----- Original Message ----- From: "Marc Bevand" <m.bev...@gmail.com> To: <zfs-discuss@opensolaris.org> Sent: Thursday, January 01, 2009 6:40 PM Subject: Re: [zfs-discuss] ZFS vs HardWare raid - data integrity? > Mattias Pantzare <pantzare <at> gmail.com> writes: >> On Tue, Dec 30, 2008 at 11:30, Carsten Aulbert wrote: >> > [...] >> > where we wrote data to the RAID, powered the system down, pulled out >> > one >> > disk, inserted it into another computer and changed the sector checksum >> > of a few sectors (using hdparm's utility makebadsector). >> >> You are talking about diffrent types of errors. You tested errors that >> the disk can detect. That is not a problem on any RAID, that is what >> it is designed for. > > Mattias pointed out to me in a private email I missed Carsten's mention of > hdparm --make-bad-sector. Duh! > > So Carsten: Mattias is right, you did not simulate a silent data > corruption > error. hdparm --make-bad-sector just introduces a regular media error that > *any* RAID level can detect and fix. > > -marc > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
