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PERC 5/i RAID Card: Tips and Benchmarks - Page 259

post #2581 of 7176
Quote:
Originally Posted by DuckieHo View Post


I believe someone here was able to hit over 600MB/s with the 5/i....

Well I can hit 600mb/s + with the Perc 5i, but its not consistent across the board. The usual (HD Tune) is 450MB/s with 8mb, Crystal Disk Mark is 400MB/s with testing at 1000MB, but 600MB/s at 50 and 100MB. Cache is usually the reason for the discrepancy.

ATTO averages around 450MB/s, but if I do 256KB transfers only t goes up to 610MB/s.

Perc5i is good, but the aging IOP333 can't handle more than two high end SSD's.
post #2582 of 7176
Quote:
Originally Posted by dogchainx View Post
Well I can hit 600mb/s + with the Perc 5i, but its not consistent across the board. The usual (HD Tune) is 450MB/s with 8mb, Crystal Disk Mark is 400MB/s with testing at 1000MB, but 600MB/s at 50 and 100MB. Cache is usually the reason for the discrepancy.

ATTO averages around 450MB/s, but if I do 256KB transfers only t goes up to 610MB/s.

Perc5i is good, but the aging IOP333 can't handle more than two high end SSD's.
are you talking read or writes? i ask because if you read my post a couple of pages back, i believe the PERC 5/I has a theoretical max of 500MB/sec on the sequential writes due to the shared PCI-X bus that has to flush cache while receiving the writes. I can see sequential reads exceeding 500MB/sec, but probably not going to go beyond 700MB/sec.
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post #2583 of 7176
Quote:
Originally Posted by BLinux View Post
are you talking read or writes? i ask because if you read my post a couple of pages back, i believe the PERC 5/I has a theoretical max of 500MB/sec on the sequential writes due to the shared PCI-X bus that has to flush cache while receiving the writes. I can see sequential reads exceeding 500MB/sec, but probably not going to go beyond 700MB/sec.
Those numbers of the PERC 5/i with SSD's are with sequential reads. Sequential Writes are around 400MB/s with a 1000MB file in Crystal Disk Mark, and 590MB/s with 50MB file.

ATTO max's around 400MB/s, with averaging around 330MB/s writes.
Edited by dogchainx - 6/9/09 at 8:41am
post #2584 of 7176
What are the Dell Perc 6e like ? Whats the difference between the perc 5-6i and e ?

Thanks
post #2585 of 7176
Quote:
Originally Posted by w311zy View Post
What are the Dell Perc 6e like ? Whats the difference between the perc 5-6i and e ?

Thanks
i = internal SAS connectors
e = external SAS connectors
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post #2586 of 7176
Quote:
Originally Posted by w311zy View Post
What are the Dell Perc 6e like ? Whats the difference between the perc 5-6i and e ?
start reading from this post:

http://www.overclock.net/hard-drives...ml#post6301108
post #2587 of 7176
This thread is huge and helped me decided on a PERC 6/i. However I'm still curious how the Perc 6/i functions with SSDs. I've seen SSDAddict's Intel X25 results but has anyone else used other/cheaper SSDs? I'll have access to a stack of SSDs but none of them are the Intel X25E/M drives. Googling around didn't turn up anything and searching resulting in a bunch of garbage.
    
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post #2588 of 7176
Quote:
Originally Posted by Gomeler View Post
This thread is huge and helped me decided on a PERC 6/i. However I'm still curious how the Perc 6/i functions with SSDs. I've seen SSDAddict's Intel X25 results but has anyone else used other/cheaper SSDs? I'll have access to a stack of SSDs but none of them are the Intel X25E/M drives. Googling around didn't turn up anything and searching resulting in a bunch of garbage.
UPDATE. The thread was either deleted or the forum is having problems.

Go to this GOOGLE CACHED LINK


Link to LSI Logic 1078 based LSI 8704ELP

LSI Logic 1078 ROC chip is whats used in the Perc 6i and a bunch of other RAID solutions.
Edited by dogchainx - 6/10/09 at 8:55am
post #2589 of 7176
Thread Starter 
Quote:
Originally Posted by dogchainx View Post
Link to LSI Logic 1078 based LSI 8704ELP

LSI Logic 1078 ROC chip is whats used in the Perc 6i and a bunch of other RAID solutions.
Nice link... that proves that a discrete RAID controller helps even with relatively simple 3xRAID0.
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post #2590 of 7176
Thanks for that link, answered any lingering questions I had. Now time to arrange for 6-8 SSDs in anticipation
    
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