On Tue, Aug 4, 2015 at 6:38 PM, Alex <mysqlstudent@xxxxxxxxx> wrote: > I panicked a bit, and didn't want to do something stupid (like mdadm > -C) before passing it by at least one other person. I definitely suggest you make a backup of each device superblock and distribute it somewhere safe in the unlikely event two devices in a mirrored array stop cooperating. The superblocks do come in handy from time to time when they can't be acquired once problems happen. The other thing is, if you're panicked, it kinda suggests no recent backup. I can't tell you how many sad panda faces I see on many lists, including the linux-raid@ list (all things RAID on Linux but mainly md/mdadm) and it's like, really no backup? The brutal response is, if you don't have a backup the data isn't important. >After connecting > the power cable, I was able to easily "mdadm --add" the drives back > and rebuild both degraded arrays. The /var/backup partition came up > automatically. Great! > Another great mdadm command to know is --details. Yeah it's easy to get -D and -E confused. -D is pointed at the running array and -E is pointed at devices. But they're functional equivalents. -- Chris Murphy -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
