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SATA III Mechanical Drive? - Page 2

post #11 of 14
Just think about it.

Why would a HD that doesn't even come close to SATA1 or SATAII specs perform better with a faster SATAIII interface?

Answer.....It doesn't and never will.
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post #12 of 14
Quote:
Originally Posted by ski-bum View Post
Had two SATA3 HD in RAID0 on the Marvell controller and found they were faster on the Intel Rapid Storage Controller in SATA2.
Nice to know. I was looking for this info. However, is it better to run a sigle HDD on SATA3 rather than SATA2? I got WD Caviar Black that supports SATA3 and I got it hooked to Marvell controller (6GB/s) right now. Will it increase the speed if I go for native Intel SATA2?

Thanks in advance!
post #13 of 14
Quote:
Originally Posted by Lampen View Post
This. I've got two of the Sata III WD Caviar Blacks in Raid 0 and I only get about 250mb/s.
It doesn't work like that.

Each HDD gets a dedicated SATA 6Gb/s connection to the controller. The controller then has connection to the system. The bottleneck is in the controller, not SATA.

Quote:
Originally Posted by Kaosuonline View Post
6Gbps = 0.75GBps = 768MBps So SATA III has a bandwidth ceiling of 768MBps, realistically it's probably a little less. Again, I'm not an expert, can anyone confirm this?
You have to account for encoding and overhead. SATA 6Gb/s maxes out at less than 600MB/s.

Quote:
Originally Posted by XSCounter View Post
Nice to know. I was looking for this info. However, is it better to run a sigle HDD on SATA3 rather than SATA2? I got WD Caviar Black that supports SATA3 and I got it hooked to Marvell controller (6GB/s) right now. Will it increase the speed if I go for native Intel SATA2?

Thanks in advance!
SATA 6Gb/s vs SATA 3Gb/s makes no difference.

However, running on a native controller is better than a 3rd party non-discrete controller.
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post #14 of 14
To be quite honest here, there are only a couple of mechanical SATA drives that can even saturate a SATA controller. None can even come close to saturating a SATA 2 or SATA 3 controller and it's quite doubtful they ever will. SATA 3 is only useful for SSD's as they are the only drives that can even come close to saturating them.
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