Re: [zfs-discuss] ZFS on Dell with FreeBSD

[Krunal Desai]

On Thu, Oct 20, 2011 at 5:49 AM, Albert Shih albert.s...@obspm.fr wrote:
 I'm not sure what you mean when you say «H200 flashed with IT firmware» ?

IT is Initiator Target, and many LSI chips have a version of their
firmware available that will put them into this mode, which is
desirable for ZFS. This is opposed to other LSI firmware modes like
IR which is RAID, I believe. (which you do not want). Since the H200
uses a LSI chip, you can download that firmware from LSI and flash it
to the card turning it into an IT-mode card and a simple HBA.

--khd
___
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org

Re: [zfs-discuss] ZFS on Dell with FreeBSD

[Krunal Desai]

On Wed, Oct 19, 2011 at 10:14 AM, Albert Shih albert.s...@obspm.fr wrote:
 When we buy a MD1200 we need a RAID PERC H800 card on the server so we have
 two options :

        1/ create a LV on the PERC H800 so the server see one volume and put
        the zpool on this unique volume and let the hardware manage the
        raid.

        2/ create 12 LV on the perc H800 (so without raid) and let FreeBSD
        and ZFS manage the raid.

 which one is the best solution ?

 Any advise about the RAM I need on the server (actually one MD1200 so 12x2To 
 disk)

I know the PERC H200 can be flashed with IT firmware, making it in
effect a dumb HBA perfect for ZFS usage. Perhaps the H800 has the
same? (If not, can you get the machine configured with a H200?)

If that's not an option, I think Option 2 will work. My first ZFS
server ran on a PERC 5/i, and I was forced to make 8 single-drive RAID
0s in the PERC Option ROM, but Solaris did not seem to mind that.

--khd
___
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org