I'm not sure why people obsess over this issue so much. Disk is cheap. We have a fair number of 3510 and 2540 on our SAN. They make RAID-5 LUNs available to various servers.
On the servers we take RAID-5 LUNs from different arrays and ZFS mirror them. So if any array goes away we are still uperational. VERY ROBUST! If you are trying to be cheap, then you could: 1) Use copies=2 to make sure data is duplicated 2) Advertise individual disks as LUN build RAIDZ2 on them. The advantage of intelligent array is I have low-level control of matching a hot-spare in array#1 to the LUN in array#1. ZFS does not have this fine-grained hot-spare capability yet so I just don't use ZFS sparing. Also the array has SAN connectivity and caching and dual-controllers that just don't exist in the JBOD world. I am hosting mailboxs for > 50K people, we cannot afford lengthy downtimes. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
