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PERC 5/i RAID Card: Tips and Benchmarks - Page 57

post #561 of 7269
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. See mine still falling off from 1% on
Well that doesn't make sense... you have worse average than I do
Quote:
Originally Posted by JustusIV View Post
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.
Oh haha, RAID 5 is a tad different than my RAID 0....

anyhow Ill ask again, do I lose data from changing stripe size?

Ive also completely remove the BBU and my computer... anyone else have this thing where the MegaRAID manager is very slow?
Stuff from my log:
BBU Disabled; changing WB logical drives to WT (WHAT IS THIS??)
Battery Removed (uhh, it was never in since boot?)
    
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post #562 of 7269


Here is a 4 disk raid 0


Unsure about your questions though.
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post #563 of 7269
Thread Starter 
Quote:
Originally Posted by XFreeRollerX View Post
BBU Disabled; changing WB logical drives to WT (WHAT IS THIS??)
Battery Removed (uhh, it was never in since boot?)
WB = Write Back
WT = Write Through

Write Back gives better performance but you risk data corruption from power failure. It basically stores data on the RAM. You can enable this without a BBU in the card's BIOS.
Once again...
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post #564 of 7269
Quote:
Originally Posted by JustusIV View Post


Here is a 4 disk raid 0


Unsure about your questions though.
Jesus thats fast! See, that is what I wanted - GOOD RESULTS
Quote:
Originally Posted by DuckieHo View Post
WB = Write Back
WT = Write Through

Write Back gives better performance but you risk data corruption from power failure. It basically stores data on the RAM. You can enable this without a BBU in the card's BIOS.
ARAHRARHGHGHGHGH The box is checked to force Write Back without BBU in the controller BIOS

How do I fix this
    
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post #565 of 7269
Quote:
Originally Posted by XFreeRollerX View Post
Jesus thats fast! See, that is what I wanted - GOOD RESULTS
What are the speeds of your drives? mine are about 110MB/s at the fast part of the platters so 4X1TB is about 4X110MB or 440MB/s for the raid. There really isnt anything slowing down a raid 0 so you get close to linear results. I am still 100% convinced you have a bottle neck that is not the card or the drives. We know the card is faster then your results and the drives i would expect to see the fall off right from the get go like my results.


*EDIT*
My reconfiguration of my raid from 4 disk to 5 disk is going but at 5.5hr it says 19% done and only 4.5 hrs to go. :/
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post #566 of 7269
Quote:
Originally Posted by JustusIV View Post
What are the speeds of your drives? mine are about 110MB/s at the fast part of the platters so 4X1TB is about 4X110MB or 440MB/s for the raid. There really isnt anything slowing down a raid 0 so you get close to linear results. I am still 100% convinced you have a bottle neck that is not the card or the drives. We know the card is faster then your results and the drives i would expect to see the fall off right from the get go like my results.
Well it is one of two problems

1: I installed the wrong Windows RAID driver at installation
2: Even though I am trying to force Write back, it won't let me, which kills performance


Can someone tell me which drivers during Windows Vista64 Install I should use? Right now I only use the ones labeled "Virtual Device" and the one that has the "LSI MEGARAID 8084E" labels. DId I use the wrong ones?

I don't know what my individual drives benched at though - Last I remember I could get over 90MBPS in a file tranfer though, so that might be something?
    
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post #567 of 7269
I am running vista 32 bit but....

My driver is labeled.
"LSI Logic MegaRaid SAS 8480E Raid Controller"

Driver details
Provider: LSI Corp
Date: 2/14/2008
Version: 2.20.0.32

Do you have the software "MegaRaid Storage Manager v2.35-01" installed?
I never make any changes through the bios only through that software.

*EDIT*
My drivers/software could be slightly out of date.
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post #568 of 7269
Quote:
Originally Posted by JustusIV View Post
I am running vista 32 bit but....

My driver is labeled.
"LSI Logic MegaRaid SAS 8480E Raid Controller"

Driver details
Provider: LSI Corp
Date: 2/14/2008
Version: 2.20.0.32

Do you have the software "MegaRaid Storage Manager v2.35-01" installed?
I never make any changes through the bios only through that software.

*EDIT*
My drivers/software could be slightly out of date.
Ok thats the driver I installed - not out of date it just depends on the package you downloaded

Ill try to force WriteBack through the storage manager...


EDIT**
check my settings, what should I change? I enabled write back this time
LL
Edited by XFreeRollerX - 11/6/08 at 3:11pm
    
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post #569 of 7269
Some benchmarks from my array.

Perc Setup = 4, or 5-300Gb SATA1 Maxtor 6L300S0 - Dell Perc controller in a x4 slot w/512Mb ddr2-3200 ECC

Motherboard = Gigabyte GA-965p-DQ6 w/ICH8r (4 drive per array MAX:swearing

All perc benches were with writeback, adaptive read-ahead, direct-io.

The ICH8r bench was with the controllers defaults.
--------------------------------------------------------------------

ICH8r 4xRAID0 128k (adapter's max)


--------------------------------------------------------------------

PERC 4xRAID0 256k


--------------------------------------------------------------------

PERC 5xRAID0 256k


--------------------------------------------------------------------

PERC 5xRAID0 512k


--------------------------------------------------------------------

PERC 5xRAID0 1024k


--------------------------------------------------------------------

PERC 5xRAID5 64k


--------------------------------------------------------------------

*WRITE BENCH*
PERC 5xRAID0 512k


--------------------------------------------------------------------

Sadly I have my system running off of the ICH8r 4xRAID0+1 right now. I just bought a eVGA GTX280 SuperClocked, and if I start a game with the PERC controller and the new video card, my system will just power down, so for now I have the controller unplugged. I am going to order a 1000w single rail PSU in a couple weeks, then I'll have it setup 5xRAID0 1m. I don't care about data loss.
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post #570 of 7269
Quote:
Originally Posted by xboxor View Post
I am going to order a 1000w single rail PSU in a couple weeks,
Lol, yeah, I had to do the same thing when I went SLI on my last 8800GTX cards

Guys I cant disabled Write through, write back keeps getting forced off

My BBU seems to have zero charge. Im using an LED light to try an power it and its not lighting at all
    
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