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PERC 5/i RAID Card: Tips and Benchmarks - Page 105

post #1041 of 7172
Quote:
Originally Posted by Villainstone View Post
Update: Using HD Tach on default I get about 30MB/s read, and upping the HD Tune blocks to 8MB I am seeing about 500MB/s. Is there a way to test actually real world tranfers?
Do you have a few HDD's in your machine to transfer to?

I would say a few networked machines, but unless you've got quad gig or more you won't be able to see.

The best way would be the array -> other internal drives.


Quote:
Originally Posted by Villainstone View Post
That is how I updated my FW. I let windows find the drivers after I used black tape on the 5/6 pin. I then realized I had the wrong cable, now I have the right one, and now I am troubleshooting the array. So does anyone suppose that all is well here? I mean I am getting much better results witha higher block size but can anyone explain why so slow with smaller blocks.
With my 5 drive array I had to go to 512MB block size in order to actually show full performance. At 64k I was getting 80-100MB/s average, and it kept jumping all the way to 512k block size. 512k I actually got 360MB/s average. Any higher than 512k yielded the same results.
 
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post #1042 of 7172
Just upgraded my array.


6x640GB RAID5 + 1 hot spare


Write speeds are abysmal but whatever, its just a file server.
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post #1043 of 7172
a friend of mine just bought 4 500gb 7200.12 drives to use in RAID 0 his new rig- i reccomended that he pick up one of these raid cards off of ebay, as he was planning to put them on the SB750, but on further examination, he'd have to run it in a PCIe gen 2 slot that is x16 physical, 4x electrical. as i understand, the card will fit into the slot but is meant to run at x8.

my question is what impact the x4 slot will have on the performance of the array - i told him to hold off on the card until i could get this figured out for him.
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post #1044 of 7172
Thread Starter 
For those having benchmarks issue.... If you get HD Tune Pro, it allows you to adjust the sector test size.


Quote:
Originally Posted by lowfat View Post
Just upgraded my array.

6x640GB RAID5 + 1 hot spare


Write speeds are abysmal but whatever, its just a file server.
Write speeds should be much better... Are you sure Write Back is Enabled? With my 3xRaptors, I went from 12MB/s to 121MB/s!


PERC RAID5 (Write-Back OFF, Adaptive-Read-Ahead) [64KB]


PERC RAID5 (Write-Back ON,Adaptive-Read-Ahead) [64KB]



Quote:
Originally Posted by daellum67 View Post
a friend of mine just bought 4 500gb 7200.12 drives to use in RAID 0 his new rig- i reccomended that he pick up one of these raid cards off of ebay, as he was planning to put them on the SB750, but on further examination, he'd have to run it in a PCIe gen 2 slot that is x16 physical, 4x electrical. as i understand, the card will fit into the slot but is meant to run at x8.

my question is what impact the x4 slot will have on the performance of the array - i told him to hold off on the card until i could get this figured out for him.
The card will work x4 PCIe 1.x mode then.... that will provide 1000MB/s bandwidth which is plenty.
Edited by DuckieHo - 1/28/09 at 9:48am
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post #1045 of 7172
Quote:
Originally Posted by daellum67 View Post
a friend of mine just bought 4 500gb 7200.12 drives to use in RAID 0 his new rig- i reccomended that he pick up one of these raid cards off of ebay, as he was planning to put them on the SB750, but on further examination, he'd have to run it in a PCIe gen 2 slot that is x16 physical, 4x electrical. as i understand, the card will fit into the slot but is meant to run at x8.

my question is what impact the x4 slot will have on the performance of the array - i told him to hold off on the card until i could get this figured out for him.
I'm running mine in a x4 2.0 slot.

a 1.x PCI-e 4x slot will yield 1GB/s bandwidth
a 2.0 PCI-e 4x slot will yield 2GB/s bandwidth

He'll be fine.

Edit: Oops, didn't read Duckie's fine print at the bottom already answering your question
 
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post #1046 of 7172
ok cool

and this is all that is needed for the ddr2 slot?
http://www.buy.com/retail/product.as...40&dcaid=17902
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post #1047 of 7172
Ok sense performance is looking better I am over at the OCZ forums right now. There are several guys that are very experienced with these SSD drives and RAID cards. There is even a guy with the PERC 5/i card and 3 Core V2 SSD's. I will post any and all help that they provide so that anyone else here can benefit from their help as well as yours.
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post #1048 of 7172
Quote:
Originally Posted by DuckieHo View Post
For those having benchmarks issue.... If you get HD Tune Pro, it allows you to adjust the sector test size.




Write speeds should be much better... Are you sure Write Back is Enabled? With my 3xRaptors, I went from 12MB/s to 121MB/s!
Ya I fixed it. Cache was set to Direct IO instead of Cached IO Besides the access times I am getting as high reads/writes as my SSD array.


Quote:
Originally Posted by Villainstone View Post
Ok sense performance is looking better I am over at the OCZ forums right now. There are several guys that are very experienced with these SSD drives and RAID cards. There is even a guy with the PERC 5/i card and 3 Core V2 SSD's. I will post any and all help that they provide so that anyone else here can benefit from their help as well as yours.
I've used my SSD's on my Perc 5/i. I was running 4 x Patriot 32GB drives. On the PERC they didn't have the write performance that they do on the ARC1220.

This is 4 drives w/ 128k stripe


and 4 drives w/ 256k stripe


and compared to the ARC1220 w/ 128k stripe


Is your card flashed to the LSI firmware? If not flash it. Then download and install the MegaRAID manager software.

Then make sure these are all set.


Hope that helps.
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post #1049 of 7172
Thread Starter 
Awesome! Much better performance now.


The ARC1220 ran you around $400?
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post #1050 of 7172
Quote:
Originally Posted by DuckieHo View Post
Awesome! Much better performance now.


The ARC1220 ran you around $400?
More as I live in Canada. $499 I think plus the BBU which was another $125

IMO not really worth the money over a PERC.
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