On 09/13 02:12 , Marcel Meckel wrote:
> Debian Wheezy will be running from SD card inside the server,

My company tried using CF cards as OS storage devices for a while. Our
experience is that (anecdotally) they aren't any more reliable than spinny
disk. They still fail sometimes.

I don't know if SD cards will be any different, or if you might have a
different way of mounting them which will be better.

>    2. I always use LVM but it might not be useful in this case.
>       Would you recommend using LVM when the whole 12 TiB is used as
>       one big filesystem only? It might be useful if i have to add
>       another shelf of 25 disks to the system in the future to be
>       able to resize the DATADIR FS spanning then 2 enclosures.

I wouldn't bother. I've done it both ways (with, and without the LVM). If
you *know* that you'll be adding more disks in the future, it's a good idea.
My experience is that planned expansions usually don't happen. ;) Also, if
you're going to add more disks for more capacity, you're much better off
adding a whole new machine. A second machine will increase your overall
backup throughput as well as increasing your disk space. you won't get the
benefit of pooling; but you will get more hosts backed up in a shorter
amount of time.

-- 
Carl Soderstrom
Systems Administrator
Real-Time Enterprises
www.real-time.com

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