Am 16.04.2010 02:03, schrieb Neil Bothwick: > On Thu, 15 Apr 2010 14:30:04 -0700, Mark Knecht wrote: > >> I would like to back up a mounted RAID0 to a mounted RAID1. > > The RAID makes no difference, because rsync works at the filesystem level. > >> Would the following command be appropriate to backup /virdata on >> RAID0 to /backups on RAID1? >> >> rsync -avx /virdata/. /backups/. > > Yes, although the use of -v makes it harder to see any errors that may > occur. >
You should also consider using --delete to cleanse your backup space from deleted or renamed files. >> It appears that maybe the -a option wouldn't copy the links? > > It does. > >> Also, how does rsync handle the backup if the RAID0 directory is >> active and changing? Will it keep working until there are no >> differences? Or does it read once and copy? > > It reads once, and will generally produce an error if a file has changed > between scanning and copying. Running rsync repeatedly until it returns > a 0 status may be worth considering. > > If you have an LVM on top of your RAID, you can also use LVM snapshots for this. Of course, if a larger write action is going on, you still get a half baked file. Hope this helps, Florian Philipp
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