On Thu, Jan 25, 2007 at 02:24:47PM -0600, Al Hopper wrote: > On Thu, 25 Jan 2007, Bill Sommerfeld wrote: > > > On Thu, 2007-01-25 at 10:16 -0500, Torrey McMahon wrote: > > > > > > So there's no way to treat a 6140 as JBOD? If you wanted to use a 6140 > > > > with ZFS, and really wanted JBOD, your only choice would be a RAID 0 > > > > config on the 6140? > > > > > > Why would you want to treat a 6140 like a JBOD? (See the previous > > > threads about JBOD vs HW RAID...) > > > > Let's turn this around. Assume I want a FC JBOD. What should I get? > > Many companies make FC expansion "boxes" to go along with their FC based > hardware RAID arrays. Often, the expansion chassis is identical to the > RAID equipped chassis - same power supplies, same physical chassis and > disk drive carriers - the only difference is that the slots used to house > the (dual) RAID H/W controllers have been blanked off. These expansion > chassis are designed to be daisy chained back to the "box" with the H/W > RAID. So you simply use one of the expansion chassis and attach it > directly to a system equipped with an FC HBA and ... you've got an FC > JBOD. Nearly all of them will support two FC connections to allow dual > redundant connections to the FC RAID H/W. So if you equip your ZFS host > with either a dual-port FC HBA or two single-port FC HBAs - you have a > pretty good redundant FC JBOD solution. > > An example of such an expansion box is the DS4000 EXP100 from IBM. It's > also possible to purchase a 3510FC box from Sun with no RAID controllers - > but their nearest equivalent of an "empty" box comes with 6 (overpriced) > disk drives pre-installed. :( > > Perhaps you could use your vast influence at Sun to persuade them to sell > an empty 3510FC box? Or an empty box bundled with a single or dual-port > FC card (Qlogic based please). Well - there's no harm in making the > suggestion ... right?
Well, when you buy disk for the Sun 5320 NAS Appliance, you get a Controller Unit shelf and, if you expand storage, an Expansion Unit shelf that connects to the Controller Unit. Maybe the Expansion Unit shelf is a JBOD 6140? -- albert chin ([EMAIL PROTECTED]) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
