On 2006-04-10 07:11, Toomas Aas wrote:
stan wrote:
I'm wondering if I can do something with, say, 5
old DDS2 drives to give me a decent size?
AFAIK, and if I may loosely compare RAIT to RAID, there is no RAIT0, so
to speak. Meaning that RAIT doesn't give you a larger 'virtual' backup
media, it merely allows to 'mirror' your backup to two (or more?) devices.
Amanda can do what you want, but this doesn't involve RAIT. If you want
a single backup run to use 5 DDS2 tapes, you should set 'numtapes' to 5
in amanda.conf and configure a changer. If you don't have an actual tape
changer hardware, you can configure a 'human' changer using chg-manual.
A RAIT with X tapes gives you a virtual tape capacity of X-1 times
the capacity of a single tape. Amanda can do RAIT with 2, 3 and 5
tapes. (RAIT with 2 drives is a simple mirror.)
So with 5 DDS2 drives each 4 GB capacity in a RAIT you get "single"
tape capacity of about 16 GByte. This also help you in increasing
the limitation of "one chunk <= one tape".
(One chunk = one backup image in pre-2.5.0.)
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