Well for a long time (maybe starting from 1995 when I had my first computer 486@33), scsi is a shining word which means fast, reliable, less cpu ocupation and etc. For the next 10 years, I had DIYed 4 rigs for myself and each time I just do not have the chance to obtain the scsi since I think desktop's PCI bus dramastically reduced scsi's performance.
This time, I finally got the chance, and I spend extra $$ to get the Asus p5wdg2 ws pro in order to use the pci-x 133 scsi card. Then I spend $400 for the lsi 2032R kit + fuji MAW 10k drive.
When I saw the Lsi scsi bios poped up in the boot time, I felt quite released - "my ten years dream fulfilled today " , that is really what I thought at that time. However this kind of happyness just did not last long !!!
I used sisofte sndra and get my fuji speed at 83MB/s , still happy at that time, but soon I was astonished to find that my sata2 segate 320G has a speed of 71MB/s !!! My god, isn't that a sarcastic number ? My $$$ scsi setup only beats my $97 sata2 by a margin ???
I tried HD Tach right away and got even more depressing result, my fuji has Average read at 72MB/s with cpu 2%, but my segate has 64.9MB/s with cpu 1% ???!!! Evenmore, my segate has burst speed 258.6MB/s which beats my fuju at 233MB/s !!! Now is it a joke that scsi has less cpu utilization, fast burst rate ?
Now I am in a deep sorrow, it turns out that scsi is a fantacy and I do not think those 15K drive will have much difference.... Maybe in old days they are superior to IDE, but it seems now they are just meaning "EXPENSIVE". Maybe I am wrong, but that is what i got from the benchmark. These days I am just asking myself , do I spend $400 for my rig's performance or just fulfilled my beautiful dream ?
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