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22747 Discussions

IRST 9.6 Significant performance decrease!

idata
Employee
‎06-02-2010 09:03 AM
3,096 Views

Just installed IRST 9.6 and run a bench, has anyone got smimilar results, a drastick performance decrese below 4k and above 128k compared to 8.9? It seems reliablility was increase but performance decreased?

Here is a screen shot WD Black 750GB in RAID1 on a P5E WS PRO, 96 left 8.9 right.

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idata
Employee
‎06-19-2010 06:53 AM
2,143 Views

I confirm.

pc hpe 010 with 2 HDDs WD caviar green

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idata
Employee
‎06-24-2010 03:06 AM
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In response to idata

Hello,

This is my résults, tested with HDTune (free) and only 8MB bloc size.

- v8.9 = ~49 MB/s

- v9.6 = ~39 MB/s

Rate is decreasing of 20%

Regards.

Note : my 2 HDD are 1T - 5400trs/mn

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idata
Employee
‎06-28-2010 06:37 AM
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Is this with "Write-back cache" Enabled in IRST panel?

In Device manager > disk drivers > your Array > Properties > Policies check "Turn off Windows write-cache buffer flushing on the device" in win 7 improves performance a bit.

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idata
Employee
‎06-28-2010 08:54 AM
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In response to idata

No, Write-back cache is off in the 2 cases. Only HDD cache are Enable.

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