Windows 7 - Cornfused

HammerHead · 11-07-2011

I used Atto to test a OCZSSD2-2VTXE120G, which is Sata II. I'll post snips of three different test configs and the adverstised specs. When I look at it I am undecided for some reason wheter the disk is preforming up to specs. How about some comment?

The disk was in an external Sata dock. (Sata cable)

HammerHead · 11-08-2011

Someone, is this disk any good?

essenbe · 11-08-2011

Just off the top of my head, it does not look right. The overlapped I/O pattern looks good although it is far short of the rated speed. But, the other 2 tests do not look right at all to me. have you checked the alignment and are you in AHCI mode?

HammerHead · 11-09-2011

I'll double check the alignment today. The rig is booting into raid config but I have no raid arrays assigned.

Hopalong X · 11-09-2011

Possible the external SATA "Dock" is a bottle neck.

USB or e-SATA Dock?

Also unless you ran the "SATA" cable inside the case direct it is plugged into an e-Sata port on the case.
The onboard e-Sata has its own controller seperate from the internal SATA ports.
Possibly slower than internal SATA

So please explain what dock you are using and where does the dock cable plug into the motherboard.
This would help greatly.

HammerHead · 11-09-2011

It's a Kingwin EZDock ESatat or USB. I am using a external sata cable plugged in to an external sata port on the MoBo.

HammerHead · 11-09-2011

I checked the alignment. It is 1024KB which is div by 4. I changed the rig to AHCI and reran the test they are close enough to be called the same. The only test that shows really good is the one with "Direct I/O" unticked. That means it is using system buffering if I understand it. I am starting to think the disk is allright.

Hopalong X · 11-09-2011

1024 is the right alignment.

I'm not sure but running it through the dock, then cable length, and the e-Sata controller could slow things a little.

Direct I/O unticked is the way I run ATTO. That is default.

I think your good to go.

Mike

HammerHead · 11-09-2011

I think it is ok too. When the mfg rates these disks they must do it with system caching.

Side effect of changing to AHCI was the Intel service was using 8 to 6 % of my cpu constantly. I disabled the service and rebooted with no ill effects. Is Intel Rapid Storage Tech needed if I am not managing Raid disks?

essenbe · 11-09-2011

If you use the iaStor driver (Intel's AHCI driver), it is needed. IRST is where the iaStor driver comes from. I have it and don't use raid, but have done the same as you, disabled it in services. If you are going to use msahci driver, IRST is not needed. Consesus seems to be that iaStor posts better benchmarks than msahci, but not so that you would really notice.

Windows 7 - Cornfused

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