HAMMER best practices?

Justin Sherrill justin at shiningsilence.com
Thu Jan 10 18:38:13 PST 2013

My immediate thought is that without RAID, a disk failure means that if a
disk fails, you will have to manually take a HAMMER slave PFS and change it
to a master, which should be possible - but will take time.  RAID will
(usually, hopefully) handle a single disk failure without interruption.

The Areca cards are well supported, and I think they've even contributed
hardware for testing.  The arcmsr(4) driver should list what's
supported.  Francois
Tigeot did some testing a while ago:


Outside of that, I'd suggest building two machines.  Since you can stream
to a slave PFS over a network, have a that second machine as a remote
backup with cheap, large disks with a more generous retention policy - that
way if complete catastrophe strikes, your data's safe.

On Wed, Jan 9, 2013 at 4:20 PM, Dave Hayes <dave at jetcafe.org> wrote:

> Greetings all.
> I'm wondering what the best practice is for setting up a network mass
> storage box using HAMMER, assuming you can start from scratch and
> completely control every aspect of the hardware?
> Specifically (but general ideas are also welcome), I've used the 3ware (is
> it LSI now?) hardware RAID controllers for some time, but is hardware RAID
> necessary with HAMMER's ability to mirror? Would it be better to just get a
> 4 port SATA controller and let HAMMER mirror the important bits?
> Thanks in advance! :D
> --
> Dave Hayes - Consultant - Altadena CA, USA - dave at jetcafe.org
> >>>> *The opinions expressed above are entirely my own* <<<<
> Enjoyment is not a goal,
> it is a feeling that accompanies important ongoing activity
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