The better SATA RAID cards have hardware support. One site comparing controllers is:
http://tweakers.net/reviews/557 Five of the eight controllers they looked at implemented RAID in hardware; one of the others implemented only the XOR in hardware. Chips like the Adaptec AIC-8210 implement multiple SATA ports as well as RAID-5 and RAID-6 and a microcontroller in a single chip. JBOD probably isn't dead, simply because motherboard manufacturers are unlikely to pay the extra $10 it might cost to use a RAID-enabled chip rather than a plain chip (and the cost is more if you add cache RAM); but basic RAID is at least cheap. Of course, having RAID in the HBA is a single point of failure! This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
