Tiernan,
Hardware redundancy is important, but I would be thinking about how you
are going to back up data in the 6-24 TB range, if you actually need
that much space.
Balance your space requirements with good redundancy and how much data
you can safely back up because stuff happens: hardware fails, power
fails, and you can lose data.
More suggestions:
1. Test some configs for your specific data/environment.
2. Start with smaller mirrored pools, which offer redundancy, good
performance, and more flexibility.
With a SAN, I would assume you are using multiple systems. Did you mean
meta centre or media centre?
3. Consider a mirrored source pool and then create snapshots that you
send to a mirrored backup pool on another system. Mirrored pools can be
easily expanded when you need more space.
4. If you are running a recent OpenSolaris build, you could use the
zpool split command to attach and detach disks from your source pool to
replicate it on another system, in addition to doing more regular
snapshots of source data.
Thanks,
Cindy
On 06/25/10 13:26, Tiernan OToole wrote:
Good morning all.
This question has probably poped up before, but maybe not in this exact way…
I am planning on building a SAN for my home meta centre, and have some
of the raid cards I need for the build. I will be ordering the case
soon, and then the drives. The cards I have are 2 8 port PXI-Express
cards (A dell Perc 5 and a Adaptec card…). The case will have 20 hot
swap SAS/SATA drives, and I will be adding a third RAID controller to
allow the full 20 drives.
I have read something about trying to setup redundancy with the RAID
controllers, so having zpools spanning multiple controllers. Given I
won’t be using the on-board RAID features of the cards, I am wondering
how this should be setup…
I was thinking of zpools: 2+2+1 X 4 in ZRAID2. This way, I could lose a
controller and not lose any data from the pools… But is this theory
correct? If I were to use 2Tb drives, each zpool would be 10Tb RAW and
6TB useable… giving me a total of 40Tb RAW and 24Tb usable…
Is this over kill? Should I be worrying about losing a controller?
Thanks in advance.
--Tiernan
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