Once upon a time, Gregory Maxwell <gmaxwell@xxxxxxxxx> said: > This isn't completely true. As it stands linux raid currently lowers > the reliability of the system. This is because a single bad sector > will take a drive offline. In the process of trying to resync the > offlined drive, the other drive(s) will encounter a bad sector and > come offline. You end up with the entire array down. Just FYI: this is not a problem exclusive to Linux software RAID. I have seen similar behavior out of LSI MegaRAID cards as well (and I think other hardware RAID controllers work in a similar fashion). Most things consider a bad sector a sign of a bad drive. On today's drives, where bad sectors are remapped internally to the drive, by the time you see a bad sector, the drive has remapped a bunch of sectors (and may be out of spare space). Some type of "journalling RAID" would be a possible solution (and would also allow for much faster re-syncs on unclean shutdown, as only the last written blocks would need updating). -- Chris Adams <cmadams@xxxxxxxxxx> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble. -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx http://www.redhat.com/mailman/listinfo/fedora-devel-list
