On Wed, 06 Jun 2007, Rich might have said:
On 2007.06.05. 21:00, mikee wrote:
I have approval to move my current bacula from
one box to another, new box. The new box I need
to purchase disk for the on-disk backups before
the data reackes tape. I'm thinking about in the
range of 2TB of RAID5.
note that if you are interested in write performance (as you might be
), it might actually be cheaper... to go with raid10.
it's all your decision, and i won't rehash arguments here - but
http://www.baarf.com/ has some arguments :)
Does anyone have any thoughts or recommendations
for specific devices?
have you already decided for hardware or software raid ?
lately i'm mostly leaning towards software raid. some of the benefits
are generic maintenance, individual disk access for smart monitoring
(which also is supported by some hw raid controllers and latest
smartmontools), much easier and safer recovery in case box goes down
(you don't need another identical hw raid controller) - and there
probably are more :)
cpu overhead with raid5 for a backup machine with a modern cpu would not
be significant (actually, my backup machines mostly have idle cpus), and
probably non-existent with raid1[0]
i was reading a page some time ago which summed up linux software raid
benefits and drawbacks quite extensively (i think one of the developers
wrote that), but i can't find it right now :)
Mike
--
Rich
I'll look at the link, thanks. my current intention is linux,
software raid, raid5, and sata 2. I already have a disk array
on-site from dell using scsi drives on another box. I like scsi,
but for the disk density I'm thinking the largest drive I can
easily get is 146gb. Sata drives I can get in 500gb or 750gb and
the cheaper price for the sata drives make the sata drives more
attractive than scsi drives.
Mike
