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Old 30th April, 2002, 04:28 AM
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Good HDD benchmark Utility? (Sandra doesn't like SCSI)

Both of my raids tested VERY poorly. Way below a single IDE drive. I know they are faster from using them.

Bench util anyone?
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Old 30th April, 2002, 04:41 AM
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HDTach should do the do the trick. www.tcdlabs.com/hdtach.htm .
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Old 30th April, 2002, 04:52 AM
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ATTO says I'm pulling a hair under 40 mb/sec on the RAID 5 external array.

It won't touch the raid 0 array for some reason.

I'm going to format it and see what happens then.

One interesting thing I noticed is that IDE drives read at about half the sped they write at.

My raid 5 array writes slightly slower than it reads. This is probably because I enable write caching rather than write-thru.
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Old 30th April, 2002, 05:22 AM
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What version of Sisoft do you use? The pro version lets you benchmark scsi very well i have found out-
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Old 30th April, 2002, 10:04 AM
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Are you running Windows XP, with NTFS by any chance? There's a patch that fixes NTFS if you are running XP on a SCSI machine.

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Old 30th April, 2002, 10:02 PM
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No, I hate XP. I put 2K back on the 1800.

Sandra just plain blows for SCSI benching.
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Old 30th April, 2002, 11:26 PM
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Quote:
Originally posted by Azriel
Sandra just plain blows for SCSI benching.
I think that can be shorted... Sandra just plain blows for HD benching...

Seems to be pretty universally agreed!

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Old 1st May, 2002, 12:09 AM
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Good point...... what do you use?
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Old 1st May, 2002, 02:32 AM
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The ATTO SCSI bench is nice. (in aoafiles)
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Old 1st May, 2002, 05:15 AM
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What for ide?
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Old 1st May, 2002, 05:29 AM
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It seems to work well with IDE also. I benched my ATA-66 seagate 4gig, and it scored well, although it suffered from the typical IDE butt-slow read speeds. For some reason, IDE's are better at writing, than reading. SCSI is the exact opposite, although the spread is a lot smaller.
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Old 2nd May, 2002, 04:29 AM
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I belive thats why the scsi platform is used more in server applications- mostly its just reading that network hardrives do-
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Old 2nd May, 2002, 02:36 PM
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Quote:
Originally posted by Spyder462
I belive thats why the scsi platform is used more in server applications- mostly its just reading that network hardrives do-
Spyder
On a database that holds the logs for millions of transactions a day, I suspect that write performance and reliability is very important. SCSI has to be able to do well on both, as well as read access.

That's why there's no IDE drives in the top 10 drives (on storagereview's database) when measured by average service write time. There's also a noticable jump from the high perf IDE drives to the high perf SCSI drives.

SCSI drives do much much better when dealing with multiple users. IDE drives tend to do better when dealing with a single user... That's the way the firmware of the disks is optimised.

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Old 3rd May, 2002, 05:50 AM
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Remember---- i found that out the hardway....... :-(
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