Promise RAID array and mounting questions

Caleb Flynn calebflynn at
Tue Feb 12 21:06:42 UTC 2008

I've been using ZFS for several months now and it's been very good.
There were some problems in the beginning which have since been
remedied by using info from the following link:

The setup has is 5 x 320GB drives and 5 x 200GB drives both in RAID-Z
configuration and aggregated into 1 pool.

There was a PSU failure which destroyed the motherboard/proc running
this machine and recovery of the array in a new box was amazingly

On Feb 12, 2008 12:03 PM, Daniel Eriksson <daniel_k_eriksson at> wrote:
> Trevor Hearn wrote:
> > I can see the promise array, it shows us as DA0. The problem
> > is what is
> > listed in the Dmesg stream shows the right amount of storage
> > space on the
> > array, but when I use sysinstall, I cannot mount that space
> > as the full
> > volume. I don't know if I am missing information on what to put for
> > geometry, but anything I put does not get accepted as usable.
> You will not be able to use sysinstall for this, the array is too big.
> You should use gpt instead.
> Do you want the entire array as one partition?
> # gpt create /dev/da0
> # gpt add /dev/da0
> # newfs -O2 -U /dev/da0p1  (or 'newfs -O2 -U -i 524288 /dev/da0p1' if
> you have mostly multi-megabyte files)
> If you want multiple partitions you will have to pass a size (in
> sectors) as a parameter to 'gpt add'.
> Beware that you might not be able to fsck the filesystem because of its
> size. I'm not sure how well gjournal handles fsck of large filesystems.
> Personally I'm going with ZFS for my next large array (8x750GB).
> /Daniel Eriksson
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