On 07/24 06:47 , Les Stott wrote:
> 2. Plug in an external usb drive, mount it as an ext3 wherever you like,
> or go with hal which might auto mount it as /media/usbdisk
> (p.s. in my experience firewire cards dont always have enough drivers
> for linux, and i dont think speed is an issue)
> 3. Install backuppc from the source tarball and make the data directory
> the usb drive at the root of the drive.
I've tried doing similar things to this. I have a few cautionary comments.
- There's no need to install from a tarball. If you don't want to just mount
the USB drive on /var/lib/backuppc; use a bind mount to make it appear
there as well as the place it appears. ('man mount', '/--bind'). Packages
make your administrative life easier; use them. :)
- The reliability of external USB drives is very dubious in my experience.
Perhaps I had a run of bad luck, but out of 4-5 different USB HDD setups
that I bought within a 6 month period; I had problems with well over half
of them. (Including a really expensive shock-mounted ruggedized one).
Drives fail, enclosures fail, controllers fail; I've seen all that in one
form or another. So test them thoroughly, but I've found that if it
survives a few hours of bonnie++ testing, it should be ok. The bit that
concerns me most is power outages. Make sure your external drive is
plugged into a UPS as well. Otherwise you get filesystem corruption when
the power fluctuates.
- It should also be noted that even USB2/Firewire drives are notably slower
than internal PATA/SATA drives.
In principle it's a perfectly good scheme; I just want to let people know
I've had problems trying to do the same thing (backuppc data pool on an
external drive).
--
Carl Soderstrom
Systems Administrator
Real-Time Enterprises
www.real-time.com
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