On Thu, Mar 04, 2010 at 05:25:10PM -0500, Tom Metro wrote: > Paul Beltrani wrote: > I know there are some systems that separate the drive racks from the > controller modules, which then permit redundant controllers, but is that > the class of system you're talking about?
I'm only familiar with EMC's NAS devices (and also Sun's clustered Fishworks/7000 series systems). EMC's Celerra NAS devices have a fully redundant back-end Clariion array. This has the typical config of dual storage processors that can take over for each other connected to dual-ported trays of disk. The front-end NAS datamovers are single points of failure, but run in an active-passive cluster. Failover usually takes a minute or so. We've had a few failures on our Celerra datamovers and the clustering worked ok there. Sun's clustered 7000 systems (7310 and 7410) can run in either an active-active or active-passive configuration. Failover usually takes about a minute on our 2-tray systems, but can supposedly take more time on systems with more disks. Our experience with the 7000 series hasn't been completely trouble-free, but in terms of value for the dollar they can't be beat. The software keeps getting more stable, and they've got a lot of features lined up for 2010. -j _______________________________________________ bblisa mailing list [email protected] http://www.bblisa.org/mailman/listinfo/bblisa
