Author: Robert Hyatt
Date: 08:51:46 01/10/04
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On January 10, 2004 at 11:30:52, Lars Bremer wrote: >Hi, > >>I have to buy a new OS :-(( > >Win2k does support HT. It handles HT as two different physical processors. WinXP >can handle these virtual processors. > >>The biggest wish is a good Service Pack for Windows NT4 (SP7) with USB, >Directx9 >>and Hyperthreading support! That's all :-) > >It exists and is called Windows XP > >>BTW: >>Bob do you think that SCSI is better as S-ATA (interesting for me if I used on >>two harddisk 5-pieces for engine-engine matches with ponder = on on dual Xeon. >>After my first test it seems that S-ATA is just great for tablebases. > >Lol, SATA-drives are exactly the same as PATA-drives, there are no differences. >I count them twice, believe me. >Normally there is only a special chip at the drive's board to convert parallel >to serial. > >If you want to know which kind of drive is better to store and use tablebases, >you should read CSS 4/03, where I compared some different hard drives under this >point of view. >15k-SCSI was the best, but it was not as fast as one could think, and modern >ATA-drives are very fast too. SCSI drives offer far more than the IDE and IDE-followon SATA drives. (1) 320mb/sec burst transfers, double SATA, 2.5X IDE. (2) tagged command queueing which offloads the "optimizing" stuff from the I/O request handler and lets the SCSI controller handle multiple requests in the best possible order, something a request handler can hardly do since disk drives like to "lie" about their geometry due to various compensation zones. (3) run on a SCSI and IDE system side by side. Do something HUGE in terms of I/O on both. The scsi system will feel perfectly normal. The IDE system will basically "freeze". There is little to recommend IDE or SATA except _price_. That is where its only advantage is seen. But I want performance. And for endgame tables, the faster the better. 15K drives are great, U320 15K drives are even better. That is what I have on my dual xeon, in fact... > >ciao > >Lars
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