SAS: full duplex SATA: half duplex SAS: dual port SATA: single port (some enterprise SATA has dual port)
SAS: 2 active channel - 2 concurrent write, or 2 read, or 1 write and 1 read SATA: 1 active channel - 1 read or 1 write SAS: Full error detection and recovery on both read and write SATA: error detection and recovery on write, only error detection on read If you connect only one disk per port, not a big deal. If you connect multiple disks to raid card, or through backplane, expander, SAS makes big difference on reliability. If I had the money, I always go with SAS. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
