I use a 29160N at work in a PC, Dual 533MHz PIII processors.  I can
duplicate a 100MB file in 1.25 seconds.  Fast enough?

I have a SCSI 160 drive at home, but a 2940 card.  Which only supports
20MB/Sec.  BUT, that SCREAMS compared the built in SCSI.  I mean it really
is noticeably faster.  BUT, I have some conflict somewhere when the card is
in Ultra mode (20MB/Sec) it causes audio to stutter.  IT seems like it is a
problem with video.  When I get the time I am going to put in my Video card
from my 9500 and see if the problem goes away.  If I back the card down via
the control panel (Power Domain, Adaptec's controller for the SCSI Cards)
all is fine.  

Pass 1 18GB SCSI160 Atlas V drive running in FAST SCSI mode on 2940
controller, connected WIDE:
 Latency = 4.16 ms (7211 RPM)
 Ave. Seek = 2.75 ms, (access = 6.91 ms)
 Max. Seek = 6.50 ms, (access = 10.66 ms)
 Write transfer rate = 15728 KBytes/Sec.
 Read  transfer rate = 15728 KBytes/Sec.
 Simulated "Typical" rate = 3231 KBytes/Sec.

Pass 1 4GB Ultra SCSI drive running on 8500 built in FAST SCSI Controller:
 Latency = 4.16 ms (7211 RPM)
 Ave. Seek = 8.17 ms, (access = 12.33 ms)
 Max. Seek = 11.17 ms, (access = 15.33 ms)
 Write transfer rate = 3932 KBytes/Sec.
 Read  transfer rate = 4493 KBytes/Sec.
 Simulated "Typical" rate = 1327 KBytes/Sec.

This is done with TimeDrive from LaCie

Still, all in all, the SCSI 160 drive smokes slower drives.

A friend of mine has a ATA100 drive on a PC and he can duplicate a 100MB
file in around 24 seconds.  So SCSI blows that out of the water.  SCSI 160
is the way to go if speed is your bag, if size, get ATA.  ATA133 is coming
soon, should help close the gap until SCSI320 comes out, it if isn't out
already.  

Oh, and add a RAID in striped mode and double the speed.  I did a low level
format of a drive in a PC with a 64MB cache RAID card SCSI160.  18GB took
about 30 seconds.  Yes, SCSI160 rocks the house.

Thomas Martin


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