Low SCSI transfer speeds

[BatmanNate]

I have my rig set up with a Seagate Cheetah 18GB 10k RPM HD as my boot drive, and it runs off of a UltraWide (40mb/s) Tekram card. According to Sandra, it's quite a bit slower than all competition, including ATA66. Is there something I'm doing wrong, or do I just need a faster card? Sandra 2k1 gave it something above 14,000 for the score I believe it was. Thanks in advance!

 

[TunaBoo]

Should be better than that. Wish I had SCSI so I could help you

 

[Tweakin]

First off, I would make sure that the "Write Cache Enabled" is checked. My second thought is that if your system is OC'd, you might be running a bus speed which exceeds the SCSI Chip. I have noticed that my throughput on both my Tekram and Adaptec go down abouve 36Mhz. That equates to a 110 or 140 bus speed, if your board automatically selects for 100 or 133 bus. Try these and see what happens.

 

[BatmanNate]

Write cache is enabled. OC'ing it down didn't help any. Nuts.

 

[bex0rs]

OC'ing it down

Anyway, try HD Tach. It may give you more reliable results than Sandra.

~bex0rs

 

[yazz]

does it really matter? SCSI will be superior cause it can do multiple operations simultaneously. (like read and write, unlike single threaded IDE)

 

[Ben]

Try a different benchmark.

What model drive do you have? That Tekram card is probably hurting your score. If you want the best performance you'll need an Ultra2 or Ultra160 controller.

 

[Woodie]

FWIW, my HD benchmarks with Sandra were abysmally low. And that's on a SCSI RAID subsytem.

I've heard that Sandra for HD is not a reliable benchmark. There isn't much I'm going to do about it at this point anyway, so I haven't bothered doing more with it.

You can try HDTach, but the free version won't run under NT/2K.

--Woodie