On Tue, 28 Nov 2006, Richard Scobie wrote: > Anyway, my biggest concern is why > > echo repair > /sys/block/md5/md/sync_action > > appeared to have no effect at all, when I understand that it should re-write > unreadable sectors? i've had the same thing happen on a seagate 7200.8 pata 400GB... and went through the same sequence of operations you described, and the dd fixed it. one theory was that i lucked out and the pending sectors in the unused disk near the md superblock... but since that's in general only about 90KB of disk i was kind of skeptical. it's certainly possible, but seems unlikely. another theory is that a pending sector doesn't always result in a read error -- i.e. depending on temperature? but the question is, why wouldn't the disk try rewriting it if it does get a successful read. i wish hard drives were a little less voodoo. -dean - 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
