On Mon, Sep 1, 2008 at 5:18 PM, Mertol Ozyoney <[EMAIL PROTECTED]> wrote: > A few quick notes. > > 2540's first 12 drives are extremely fast due to the fact that they have > direct unshared connections. I do not mean that additional disks are slow, I > want to say that first 12 is extremely fast, compared to any other disk > system. > > So although it's a little bit expansive but it could be a lot faster to add > a second 2540 , than adding a second drive expansion. > > We generally use a few 2540's with 12 drives running in parallel for extreme > performances. > > Agin with the additional disk tray 2540 will still perfom quite good, for > the extreme performance....
For this application the 2540 is overkill and a poor fit. I'd recommend a J4xxx series JBOD array and and matching SAS controller(s). With enough memory in the ZFS host, you don't need hardware RAID with buffer RAM. Spend your dollars where you'll get the best payback - buy more drives and max out the RAM on the ZFS host!! In fact, if it's not too late, I'd return the 2540.... Regards, -- Al Hopper Logical Approach Inc,Plano,TX [EMAIL PROTECTED] Voice: 972.379.2133 Timezone: US CDT OpenSolaris Governing Board (OGB) Member - Apr 2005 to Mar 2007 http://www.opensolaris.org/os/community/ogb/ogb_2005-2007/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
