Les Mikesell wrote at about 11:31:28 -0500 on Saturday, April 9, 2011: > On 4/9/11 12:28 AM, Saturn2888 wrote: > > :: mdadm :: > This is what I use, with a raid1 created with 3 members but one missing. I > periodically rotate disks into a hotswap sata bay, add it long enough to > re-sync, and then fail and remove it to take offsite. The sync > operation do
I tried this just *once* and ended up losing 2 years of backups! Specifically, I had been running software RAID1 on 2 1TB disks for 2 years without any problems. Then on Black Friday, I bought a new 1TB disk and had the brilliant idea of adding it temporarily to my RAID array to create a backup. I mounted it via an external USB enclosure. Well, somehow it crashed during rebuilding, leaving the new 3rd disk unreadable and corrupting the pool on the original disk -- specifically, a number of pool files and directories were deleted or became unreadable. Not sure how and/or why this happened, but the LESSON is that RAID is not perfect and it can corrupt everything. If I do this again in the future, I probably should at a minimum remove one of the internal drives to use as backup later on in case something happens. Alternatively, I probably would have been better just taking BackupPC offline and doing a 'dd' to the new disk ------------------------------------------------------------------------------ Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
