Ahmed Kamal wrote: > > I observe that there are no disk vendors supplying SATA disks > with speed > 7,200 rpm. It is no wonder that a 10k rpm disk > outperforms a 7,200 rpm disk for random workloads. I'll attribute > this to intentional market segmentation by the industry rather than > a deficiency in the transfer protocol (SATA). > > > I don't really need more performance that what's needed to saturate a > gig link (4 sata disks?)
It depends on the disk. A Seagate Barracuda 500 GByte SATA disk is rated at a media speed of 105 MBytes/s which is near the limit of a GbE link. In theory, one disk would be close, two should do it. > So, performance aside, does SAS have other benefits ? Data integrity ? > How would a 8 raid1 sata compare vs another 8 smaller SAS disks in > raidz(2) ? Like apples and pomegranates. Both should be able to saturate a GbE link. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
