On Fri, 2005-11-11 at 08:44, OQ wrote:
>
> On 11/11/05, Carl Wilhelm Soderstrom <[EMAIL PROTECTED]> wrote:
> On 11/11 07:48 , Les Mikesell wrote:
> > In theory 'rsync -aH' could copy the archive area, but it
> will likely be
> > too slow to be practical due to all the hardlinks.
>
> there's also the issue of rsync's memory consumption, which
> can be pretty
> bad on a big tree of hardlinked files. On a machine with 512MB
> RAM, rsync
> ran it out of memory and brought it to a grinding halt when
> trying to sync
> 100GB of backuppc pool from one drive to another (installing a
> new array).
> would dd'ing to a identically sized partition on the USB/external HD
> work/be faster?
Much faster, but both partitions need to be unmounted for the duration
of the copy to be sure there are no changes. I do it with an external
firewire using software RAID1. However there are bugs in the version
I'm using (fedora FC3) that crash if I leave the raid active during
backup runs. It does work well enough to complete a sync to the
drive, which takes about 2 hours for a 250 gig partition. It might
work with USB but the machine I'm using only has USB 1.0 which is
too slow. I am able to access the external drive from my laptop's
USB 2.0 port at a usable speed.
--
Les Mikesell
[EMAIL PROTECTED]
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