Date: Sat, 19 Jul 2008 13:36:47 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: Peter Boosten <peter@boosten.org> Cc: freebsd-questions@freebsd.org Subject: Re: dump and restore Message-ID: <447ibhixn4.fsf@lowell-desk.lan> In-Reply-To: <4881901C.8000504@boosten.org> (Peter Boosten's message of "Sat\, 19 Jul 2008 08\:56\:28 %2B0200") References: <48810956.5090905@boosten.org> <200807191137.21771.malcolm.kay@internode.on.net> <4881901C.8000504@boosten.org>
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Peter Boosten <peter@boosten.org> writes: > Malcolm Kay wrote: >> On Sat, 19 Jul 2008 06:51 am, Peter Boosten wrote: >>> >>> The /usr/ partition was 74Gb, and it took (according to dump >>> 52631 seconds (~ 14.5 hours) to copy. Both disks are IDE, in >>> the same machine on different IDE controllers. >>> >> The time for dump/restore normally depends more on the occupancy of >> the partition than its actual size. This is one reason why we avoid >> using dd for this purpose as we must then copy the entire >> 74Gb rather than just that used. >> > > Hmmm, I didn't even know it was possible to dump a partition > unmounted. Try that next time then. The actual partition size was > ~200GB, but around 74Gb data. If you can, it's always *much* preferable to dump an unmounted partition. I suspect your problems here had more to do with the bad disk, though. -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/
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