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Subject: Re: Impact of disk performance in endgames

Author: Slater Wold

Date: 18:44:27 07/15/02

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Wow!  48,000kB/s?!  Not even the 15k RPM drives get that kinda of bandwidth.

Using NTFS FS under Windows 2000 AS I got 34k kB/s using Sandra 2002.6.8.97.


On July 15, 2002 at 14:05:26, john rice wrote:

>I use two Maxtor 40Gig ATA133 drives in a Raid 0 configuration and get
>outstanding performance with it. Slater, if you get a chance try running the Si
>Soft Sandra 2002 (freeware) hard drive bench mark with your scsi drive. I'm
>courious if it is faster than my Raid set-up. My average benchmark score is
>48,000kB/s.
>
>On July 15, 2002 at 11:44:01, Slater Wold wrote:
>
>>On July 15, 2002 at 10:59:04, Robert Hyatt wrote:
>>
>>>On July 15, 2002 at 08:57:13, Gordon Rattray wrote:
>>>
>>>>I currently use Fritz, etc. to analyse a lot of endgame positions.  During the
>>>>search there is often a large amount of tablebase hits (I'm currently using all
>>>>5 man TBs with a 32Mb TB cache).  It regularly seems that the disk access speed
>>>>is more of a bottleneck than the processor.
>>>>
>>>>Should I consider using a faster disk (I'm currently using a 7200rpm IDE drive)?
>>>> Will it be worth it?  Should I use SCSI instead of IDE?
>>>>
>>>>thanks in advance
>>>>
>>>>Gordon
>>>
>>>
>>>SCSI is definitely better.  10K and 15K drives are also definitely
>>>faster...  The probes are I/O intensive, so anything you can do to
>>>reduce I/O costs will help the engine.  This includes a larger Cache
>>>also, of course.
>>
>>I went from a WD 7200 RPM IDE drive to a Fuji 10K SCSI drive, and saw consistant
>>15-20 percent gains in the search of half a dozen engines.



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