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Dell Studio XPS raid performance SUCKS?

Last response: in Storage
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October 21, 2009 6:45:34 PM

I just bought a Dell Studio XPS 435MT for use in video editing and light 3D rendering. For performance I ordered a RAID 0 striped C drive with 2 500GB drives. I added an SIIG eSATA II card and 2 external 1TB drives as source and target drives.

When I use DiskTT to check read/write/random performance:
- external drives average: 75/94/4.2 MB/sec on 1GB@32k, 24/26/1.3 on 1GB@4k
- internal RAID 0 avarage: 21/23/2.1 MB/sec on 1GB@32k, 4/5/0.6 on 1GB@4k

Huh???

ty for any suggestions!

Dave
a b G Storage
October 22, 2009 9:01:57 AM

Sorry, what are you perplexed about? What the stats mean or the actual values themselves?
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October 22, 2009 1:25:35 PM

r_manic said:
Sorry, what are you perplexed about? What the stats mean or the actual values themselves?


er, did you look at the numbers?

the internal RAID 0 throughput is about 35% of the speed of a single external drive, when it should be about 150% or more... it seems to be operating at about 1/5th the speed I expect. This on a brand new Dell, with the RAID 0 configured at the factory. I'm wondering what could possibly be wrong. When Windows 7 arrives, perhaps I'll de-configure the raid and speed things up!
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a b G Storage
October 22, 2009 1:48:02 PM

What benchmark are you using? Also, if this is an Intel controller, download the Intel Matrix Storage Manager and make sure the write-back cache is enabled.
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