On 7/8/2012 8:27 AM, Patrick Domack wrote: > > Quoting Wojciech Puchar <woj...@wojtek.tensor.gdynia.pl>: > >>> I think there are optimal situations where any configuration looks >>> good . . How often can a real-world disk actually deliver the 6Gbs >>> when only a minority of disk reads are long sequential runs on the >>> platters? >> none of hard drives can saturate 1.5Gb/s > > There are many disks out that do 150-200MB/sec, easily exceeding 1.5gb/s > speeds.
There are a few SAS drives that can saturate a 150MB/s link, such as the Seagate Cheetah 15k.7, which can sustain 204MB/s streaming read on the outer tracks. But, again, streaming rate is irrelevant to mail storage. What matters is random seek latency. And the faster the spindle, the lower the latency. Thus 15k Seagate SAS drives are excellent candidates for mail store duty, as are any 10k or 15k drives. -- Stan
