On Wed, 6 Jan 2010, Hakan Koseoglu wrote: > Seconded. Also you can chain a couple of MD1000s at the back of the > MD3000 to get even more storage over SAS. We have a number of those > with the upstream OS installed but usually a single MD3000 is enough > for what we use them for (mainly Oracle DB server or VMWare hosts). We > tend to split the storage between two nodes and then do OCFS2. For the cost/performance they're not too bad a unit. We grow by about 45TB per year of Medical Imaging Data. For each 15TB we buy a new head node, we're up to three now, so performance to our cluster just gets better as we go. These are all NFS/CIFS servers on a Jumbo Frame ethernet network. I originally had difficulty with the MD3000 talking multipath to the units and the only way I could get it to work reliably in an active/active configuration was to use the provided mptsas driver which was a cinch to install. This was not the case with the Solaris hosts as they didn't talk RAID and ZFS with Solaris Multi-Pathing had built in support for the devices. -- James A. Peltier Systems Analyst (FASNet), VIVARIUM Technical Director HPC Coordinator Simon Fraser University - Burnaby Campus Phone : 778-782-6573 Fax : 778-782-3045 E-Mail : jpeltier at sfu.ca Website : http://www.fas.sfu.ca | http://vivarium.cs.sfu.ca http://blogs.sfu.ca/people/jpeltier MSN : subatomic_spam at hotmail.com Treat your password like your toothbrush. Don't let anybody else use it, and get a new one every six months. - Clifford Stoll