I have a cron job that tests each disk once per day. This really helps. But I have still had md find a bad sector. But the risk of having 2 disks with bad sectors is very low if you test each night. Guy -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Konstantin Olchanski Sent: Monday, October 25, 2004 6:02 PM To: Guy Cc: 'David Mansfield'; 'Jure Pe_ar'; linux-raid@xxxxxxxxxxxxxxx Subject: Re: raid5, media scans and stripe-wise resync On Mon, Oct 25, 2004 at 04:29:09PM -0400, anybody wrote: > 1 disk has a bad sector and another disk fails, game over. On a single-disk, 1 bad sector kills just the one unlucky file. On a degraded RAID0 or RAID5, 1 bad sector kills the filesystem. On a healthy RAID0 or RAID5, 2 bad sectors on different disks kill the filesystem. Does this make sense? RAID is less fault tolerant than a single disk? -- Konstantin Olchanski Data Acquisition Systems: The Bytes Must Flow! Email: olchansk-at-triumf-dot-ca Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
