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Slow SCSI performance

By redwards ·
I have a Dell Precision 410 Workstation, with dual 650 P3, 256 MB ram, W2K Pro SP1. I have a 40G IDE and a 4G SCSI hard drive.

The SCSI drive is connected to the built in Adaptec AIC-7890 Ultra2/Wide LVD (Adaptec 2940 U2W-equivalent). The driveis an older Western Digital Enterprise Single Ended Ultra Wide drive.

I have used the drive in a Mac, with a UW controller, and the benchmarks show it is able to transfer both read and write at the 10-15 MB/s range. Using NTBench I am only seeing 3 MB/s write and 6 MB/s read. I was expecting more.

In addition, another machine running NT4 SP6 with 4 LVD 16 gig drive running RAID 5 on an Adaptec raid card, are only able to achieve 1 to 2 MB/s write with caching turned on.

What am I missing?

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Slow SCSI performance

by steffen.hornung In reply to Slow SCSI performance

performance, but lets get serious..
I am sure you terminated correctly, checked or get new SCSI-cables, downloaded and installed the newest drivers and firmware for your scsi-cards.
Have you formatted the drive low-level during the change from themac?
Have you tried other benchmarking software like the ones from ZDNET (Serverbench etc.) ? - because never trust one alone.
How does the IDE drive perform under NTBench? Significantly faster or same range? This could lead us to a better analysis.

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Slow SCSI performance

by redwards In reply to Slow SCSI performance

The question was auto-closed by TechRepublic

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Slow SCSI performance

by redwards In reply to Slow SCSI performance

I am using the latest drivers, and what appears to be the latest firmware from Dell. The IDE drive shows 20MB/s using NTBench.

I agree with you on using more than one benchmarking program. Tried a couple but they really didn't give a good picture. WinBench didn't have much for disk tests.

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Slow SCSI performance

by M.A.S. Matrix In reply to Slow SCSI performance

ANOTHER THING THAT YOU MIGHT WANT TO TRY ARE THE JUMBER SETTING ON THE HD. GET THE DOCUMENTATI0N THAT CAME WITH OR GO TO THE WEB SITE OF THE MANUFACTURER AND SEE WHAT THE DIFFERENT JUMPER SETTINGS DO.

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Slow SCSI performance

by redwards In reply to Slow SCSI performance

The question was auto-closed by TechRepublic

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Slow SCSI performance

by redwards In reply to Slow SCSI performance

I also checked the jumpers on the disk, replaced the cable as well as installing a new copy of Win2K. Still no luck.

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Slow SCSI performance

by James_Randy In reply to Slow SCSI performance

The first answer looks good to me. If that doesn't work, try something else. Hope this helps.

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Slow SCSI performance

by redwards In reply to Slow SCSI performance

The question was auto-closed by TechRepublic

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Slow SCSI performance

by redwards In reply to Slow SCSI performance

This question was auto closed due to inactivity

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9 total posts (Page 1 of 1)  

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