Hi, After a spindle (physical hard disk, a "drive") failure in a "md" RAID array, how can we know which spindle must be replaced? We want to avoid extracting a working spindle by mistakenly thinking it is the faulty one... To solve this problem we put on each spindle a physical label (a tag, not a partition/disk label) showing its device name (sda, sdb...). To do so: on an otherwise unused system and sane RAID array we ran "dd" for each each spindle (individual device) in order to read on it, lighting up its LED. Then we simulated a crash by physically removing two spindles. Upon reboot the devices names changed (?!) and our labels weren't right anymore albeit we are pretty sure they were. Context: raid10, 10 spindles (8 active + 2 spare), layout : near=1, offset=3. On the integrated controller + a LSI MPT on-board controller. -- 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
