> Even with a controller per JBOD, you'll be limited by the SAS > connection. The 7k3000 has throughput from 115 - 150 MB/s, meaning > each of your JBODs will be capable of 5.2 GB/sec - 6.8 GB/sec, roughly > 10 times the bandwidth of a single SAS 6g connection. Use multipathing > if you can to increase the bandwidth to each JBOD.
With (something like) LSI 9211 and those supermicro babies I guess he's planning on using, you'll have one quad-port SAS2 cable to each backplane/SAS expander, one in front and one in the back, meaning theroretical 24Gbps (or 2,4GBps) to each backplane. With a maximum of 24 drives per back, this should probably suffice, since you'll never get 150MB/s sustained from all drives. Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 r...@karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
