Hi

>>> What is the recommendation when it comes to backing up over multiple HDDs
>>>
>>> I have 6 x 1TB drives, and I am trying to choose between a single LVM 
>>> volume, or 6 separate drives.
>>>
>>> Which will be more beneficial to bacula?
>> Why not RAID-5 them?   That way you'll get 5TB of storage and if a disk 
>> breaks you don't loose any data.  Thats what I did.
> 
> I am looking for expandability - ie, able to add just 1 extra disk when
> I need to
> 
> Newer kernels can extend raid 5, but I dont 'trust' it yet...

The --grow option in mdadm has been around for a while now, I'm sure its 
safe to trust.

http://scotgate.org/?p=107
http://linux-raid.osdl.org/index.php/Main_Page

> Also, raid 5 may be too slow for me, but I havent tested this yet

If LVM over 6 disks is fine for you, I assume you don't care about 
loosing the data on a disk?  Then why are you scared of the raid --grow?

If RAID5 is slow and you don't care about redundancy, then I would say 
RAID0 (or LVM) over the disks.

-- 
Adrian Moisey
Systems Administrator | CareerJunction | Your Future Starts Here.
Web: www.careerjunction.co.za | Email: adrian AT careerjunction.co DOT za
Phone: +27 21 818 8621 | Mobile: +27 82 858 7830 | Fax: +27 21 818 8855

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