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PERC 5/i RAID Card: Tips and Benchmarks - Page 56

post #551 of 7150
I think I should increase block size, no?

128k bench block

128k is my raid stripe...





Ill try 256k in a sec too
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post #552 of 7150
256k block size bench on a 128k RAID array (4 drives, RAID 0)
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post #553 of 7150
That actually looks like you're maxing out the disks....when you max out an electronic bandwidth (like the PCIe bus or the RAID processor) the line ends up flat - literally, flat. No small ups and downs like that.

Chances are that you either have a bad hard drive in the mix or you should decrease your stripe size.
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post #554 of 7150
I have a 64kb strip and test with the max 8MB benchies.
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post #555 of 7150
Quote:
Originally Posted by Manyak View Post
That actually looks like you're maxing out the disks....when you max out an electronic bandwidth (like the PCIe bus or the RAID processor) the line ends up flat - literally, flat. No small ups and downs like that.

Chances are that you either have a bad hard drive in the mix or you should decrease your stripe size.
What do you suggest changing them to?

And the HDTune thing has run on my disk for ~1 hour and my disks came out fine, I also used some USB program to scan the disks before on my board and each one checked out fine. SMART monitoring reports 0 errors....

64k stripe size? Does this mean I need to reinstall everything too?

Quote:
Originally Posted by JustusIV View Post
I have a 64kb strip and test with the max 8MB benchies.
What were your results?
    
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post #556 of 7150
Quote:
Originally Posted by XFreeRollerX View Post
What do you suggest changing them to?

And the HDTune thing has run on my disk for ~1 hour and my disks came out fine, I also used some USB program to scan the disks before on my board and each one checked out fine. SMART monitoring reports 0 errors....

64k stripe size? Does this mean I need to reinstall everything too?
Try dropping the stripe size to around that - 64k. Maybe even 32k.
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post #557 of 7150
Will I need to reformat/ will everything be deleted or will it automatically rebuild everything?
    
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post #558 of 7150
Quote:
Originally Posted by XFreeRollerX View Post
What were your results?

I posted this earlier but here it is again.
This is with 4 x 1TB drives.


Quote:
Originally Posted by Manyak View Post
That actually looks like you're maxing out the disks....

I disagree with this, if it was disks you would still get fallout through the first part of the drives not a line. See mine still falling off from 1% on
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post #559 of 7150
Thread Starter 
Quote:
Originally Posted by JustusIV View Post
I posted this earlier but here it is again.
This is with 4 x 1TB drives.

I disagree with this, if it was disks you would still get fallout through the first part of the drives not a line.
Which RAID?
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post #560 of 7150
Quote:
Originally Posted by DuckieHo View Post
Which RAID?
Raid 5?

*EDIT*
Like i said earlier, i am currently expanding my raid to Raid 5 5x1TB. Will post benchies when completed. 7hrs to go.
Edited by JustusIV - 11/6/08 at 11:43am
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