Requesting SSD-LSI RAID 0 Guru Help

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pjkenned

[H]ard|Gawd
Joined
Jan 8, 2010
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I have 8x Sandforce SSDs connected to LSI SAS 2008 and 1068e controllers.

Performance is bad... I have tried using LSI RAID 0 using MSM. I have swapped the drives to the LSI 1068e card (both in PCIe x8 slots.) I have even tried Windows RAID 0.

Here's the Picasa album with ATTO, CDM, AS SSD screenshots.

Offset is 1048576
File allocation unit size is 4096
Stripe 64K (cannot change in MSM)

Frankly, the numbers seem bizzaro but I was wondering if anyone had any ideas as I know there are a lot of people that run much faster setups here.
 
Resolution: I moved down to two 4 drive RAID 0 arrays one on each SFF-8087 port then striped those two arrays and saw:
1.2GB/s sequential read on AS SSD
Just over 1.0GB/s sequential read on CDM
2.1GB/s read and 1.7-1.9GB/s on ATTO

Interesting result anyway.
 
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