I've have a Centos5 box running a software raid-1 set on a pair of SATA drives. The SATA controller or driver has a flaw. Every 150 days or so, one of the two drives will experience errors and fail. Subsequent tests always show the drive and cable to be ok. We bought a couple of replacement drives before we figured that out :-( On the last event this weekend, I went searching for a way to get the raid back online with no host downtime. I found the technique that deletes the drive and then brings it back online with a bus scan using the /sys filesystem delete and rescan entities. I didn't realize that you could also perform a rescan on a single LUN. I'll have to use that next time. My question - since I've done a delete/rescan bus operation, my device name and major,minor numbers have changed. Original [0:0:0:0] disk ATA ST3250410AS 3.AA /dev/sdc Current [0:0:0:0] disk ATA ST3250410AS 3.AA /dev/sdc If I re-add the device to the raid set using the new device name, will it cause any problems on the next boot? The drive appears to be fine. I can read all blocks with no errors. Partition table looks ok, etc.. In the future if I rescan just the single LUN, I'm pretty sure I won't run into again this but I'd like to avoid an outage on this event if possible. Thanks and regards, --Tony -- 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
