Date: Sat, 21 Nov 2009 08:14:15 -0800 From: George Davidovich <freebsd@optimis.net> To: freebsd-questions@freebsd.org Cc: Bernt Hansson <bernt@bah.homeip.net> Subject: Re: Dump Message-ID: <20091121161415.GA68037@marvin.optimis.net> In-Reply-To: <4B075AAA.80205@bah.homeip.net> References: <4B0562A4.5050405@bah.homeip.net> <4B056636.6050309@infracaninophile.co.uk> <4B075AAA.80205@bah.homeip.net>
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On Sat, Nov 21, 2009 at 04:12:42AM +0100, Bernt Hansson wrote: > Matthew Seaman skrev: > > Bernt Hansson wrote: > > > > > > I've been testing backups with dump, works well BUT > > > -L does not work. For example > > > > > > dump -0 -a -u -L -f /mnt/dump.home.full /dev/ad0s2d > > > > I believe that you need to tell dump the mount point of the file system in > > order for it to create a snapshot, rather than the device file for the > > partition. (ie. snapshotting only makes sense on a mounted read-write > > filesystem). > > > > Also, if you're dumping a snapshotted FS to a local file, then bump up the > > cachesize to improve performance a lot. Add '-C 32' to your command-line. > > Ok. I've tested this > dump -1 -a -u -L -C 64 -h 0 -f /usr/home/bernt/disk2/dump.backup.home.2 > /usr/home > dump -1 -a -u -L -C 64 -h 0 -f /usr/home/bernt/disk2/dump.backup.home.2 > /usr/home > > The error is > mksnap_ffs: Cannot create /usr/home/.snap/dump_snapshot: Invalid argument > dump: Cannot create /usr/home/.snap/dump_snapshot: No such file or directory Aargh. Must have missed the above when I last replied. That error message indicates you're running dump without proper privileges. Run dump as root, or add yourself to the operator group: pw groupmod operator -m bernt -- George
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