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Scsi versus IDE performance

U

unhappy_mage

[H]ard|DCer of the Month - October 2005
Joined
Jun 29, 2004
Messages
11,455
As started in the MP forums, I'm trying to assess the speed of SCSI, SATA, and IDE disks in various scenarios, with benchmarks I've written and planned to write. Most of the benchmarks are strongly Linux-oriented, but anyone with coding experience is welcome to port them to Windows and post results.

For those just joining the discussion, here's the code I've written for a "streaming media" simulation. It starts 50 threads, each of which reads 100 1MB chunks and reports how long it took to get 100 and how many MB/s that is. Here's a graph of the results I have so far:
speed-graph.png

oldben-160 is 18.6gb 15krpm U160 on an Adaptec 29160LP
oldben-320 is 73.6gb 15krpm U320 on an LSI Logic/Dell LSI21320.
mage is a Seagate 7200.7 sata 200gb on an Intel ICH5.

The low results for the u320 disk is probably the result of badly written drivers for the relatively new card.

Any suggestions for synthetic benchmarks? I know, I know, they're yucky, but it's hard to write code that times "real-world" stuff. Read-only ones are good - I'm using my disk for things other than benchmarks, believe it or not ;) I'm still open to read/write ones, though.

 
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