Hi all!
I have a running Amanda config that runs on 20 DLT tapes and a changer. I would 
like to make Amanda go on disk storage rather than tape storage (the "file:" 
driver).
But I have a security problem. What if my disks crash? A Raid 5 is of course 
the first thing I would do, but if my server gets a power overload, all of my 
disks would burn, and so the backup data... I like the tapes because when the 
data is written, only fire or water could make me loose this data. And this 
list of breakdown causes is bigger if I use hard disks instead of tapes.

Why the hell do I want to unplug my brilliant DLT changer? Mainly because of 
its performances: Amanda tells me it uses 1000ko/s writing a tape, and about 
6500ko/s writing a disk. And I like this speed very much, because of the time 
needed to back up data, and mainly because of the time needed to restore them...

But I am quite afraid of some hardware security issues. Could you help me 
imagine a new backup security policy? Maybe 2 Amandas, one daily incremental 
going on disk, and one weekly always full going on tape? But that's weird, 
because one day per week I will have 2 Amandas getting the same data from the 
same clients, and the clients do not really like that 2 different Amandas run 
on them in the same time...

Any ideas?

Thanks!


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Jean-Christian SIMONETTI    email: jean-christian.simonetti AT wanadoo DOT com
SysAdmin Wanadoo Portails   phone: (+33)493004911
Sophia Antipolis, France
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