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Grant Sewell wrote:
Not tried it myself (although I had a similar idea), but I believe it might be possible with the mdadm command.Hi all, Just a quick "what if" question... 2 USB drives where periodically rsync is run to duplicate drive 1 onto drive 2. Drive 1 is static, drive 2 (should) get removed every evening and taken off-site. If the two drives were setup in a software-based RAID-1 (mirror) configuration, would they automatically reconcile any differences when drive 2 was re-attached? If not, how can differences between two software RAID-0 drives be reconciled? Is there a command that initiate the reconciliation? Can this be added to a udev rule so that when drive 2 is re-attached the reconciliation happens automatically? Cheers. Grant. :)
Doing a quick google search came up with this: http://www.linuxquestions.org/questions/linux-server-73/how-do-i-resync-a-dirty-software-raid1-558876/I'm guessing that what you need to do is remove the drive and when you reconnect the drive you have to remove it from the raid array and then re-add it.
I'd be interested to know how you get on. Seems like a quick and easy way of getting a machine back up and running.
Rob -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html