On Tue, 29 Jun 2004, Dieter Stueken wrote: > Question: > > Under which conditions a disk of a raid-5 system gets off line? > Does it happen on ANY error, even if some read error happened? yup -- md supports only "all good" or "all bad" as status for each disk -- no "partially good" status. > Will double-fault read errors on different disks destroy my > data? a double fault will take your array offline but it's typically not a catastrophic dataloss event. you will have to do manual recovery -- you'll need to do the XOR to recreate at least one of the read errors, and use mdadm to re-assemble the array. > 1) I think a disk should be kept online as long as possible. > This means, that a simple read error should not deactivate the disk ... > 2) If I decide to replace a disk, it should be possible to add a new > disk to the system before degrading it. ... > 3) If a disks happened to produce a bad sector, you may try to rewrite it i've been maintaining a wishlist, and those 3 are already on it: <http://arctic.org/~dean/raid-wishlist.html> -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
