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At 11:58 AM -0400 8/2/00, FPI wrote:
>Time for a new computer and I'm considering getting 2 SCSI drives rather than Ultra ATA/EIDE.
>
>I'll be running Win2000.
>
>Any pitfalls I should be aware of?
>
>Is the increased access time, etc., worth any extra hassle, cost?
The new Ultra ATA100 drives are quite a bit cheaper and faster than
SCSI now. Below is listed the NBench read test results for four
different combinations I recently tested:
A SCSI machine with 10000 RPM drives about one year old: 16 MB/sec
Recent SCSI machine with 7200 RPM drives: 23 MB/sec
Fast machine with Ultra ATA100 7200 RPM drive 28 MB/sec
Fast machine with Ultra ATA100 7200 RPM 2-drive RAID array 55 MB/sec
The RAID array uses the Promise FastTrack66 controller with two
drives in a striped array to effectively double the transfer rate.
Of course, if you need external drives, you may still want SCSI.
Latest summary of benchmarks attached below. The TradeStation
optimization speeds are also listed for various combinations of
computers and TradeStation versions.
Bob Fulks
----------------------------
TradeStation Optimization Tests
The time per test was as follows (in seconds). (The total time for an
optimization run would be these numbers multiplied be the number of
tests performed in the run.)
OS TS4.0 TS2000i TS2000i
SP4c SP5
HP Pavilion 8550 Celeron 500 Win98 6.4
Gateway GP6 PII 300 WinNT 6.4
Gateway E-5200 PIII 500 WinNT 5.3 4.7 2.3
RK-500 (AMD K6 500) Win2000 4.9* 5.5**
Athlon A-750rk machine*** Win2000 2.3 1.4
Athlon A-750bf machine**** Win2000 1.4
* 20 GB IDE disk
** 9 GB SCSI disk
*** Ultra ATA66 disk
**** Ultra ATA100 2-disk RAID array
------
NBench performance numbers on the machines:
RK500 E-5200 8550C A-750rk A-750bf A-750bf
CPU Performance, MOPs/sec
Integer Speed: 481 363 362 599 600 600
Floating Speed: 82 74 73 162 162 162
Disk SCSI SCSI IDE ATA66 ATA100 ATA100
7200 10000 Slow 7200 7200 7200
RAID 2
Performance (MBytes/sec)
thread: C 0 0 0 0 0 0
write: C 22 18 5 10 45 35
read: C 23 16 6 26 55 28
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