🚀 go-pugleaf

Peter Stein (nbi@xnet.com) wrote:
: In article <4g3q25$2h5g@news-s01.ny.us.ibm.net>,
: Herbert J. Ice Jr. <iceware@ibm.net> wrote:
: >In message <4g2d0n$7pm@usc.edu> - dywilson@scf.usc.edu (Donald Wilson) writes:
: >
: > Donald,
: >
: > The short story, go for the extra memory.
: >
: > The long story.
: >
: > Using an adaptec 2940w or 2940UW, using our product IWSS I can bench a 
: >Seagate barracuda ST32550W out at between 6.9->7.2 MB when reading from 
: >cylynder zero for approx 80MB of data. Now if your drive is delivering the 
: >5MB of data per second then the speedup is marginal, it would be better to 
: >have more memory, in order to reduce paging altogether. The only place where 
: >this falls apart is, when I state that our product benches the drive at that 
: >transfer rate, it is from reading the data off of the platters, yes, 
: >prefetch is still in use, but as the entire track is being read in one I/O,
: >and the same track is never read twice, the drive is being forced to go back 
: >to the platters. Some disk benchmarks, are continuously hammering on the 
: >drives cache, which artificially inflates the numbers.  
: > 
: >  At this time SCSI-3 is not an adopted standard, yes it is being used
: >in marketing hype, but that is the only place. As to UltraWide drives, 
: >well first someone must find them. Note that on the Adaptec 2940UW, the ultra 
: >wide abilties are disabled in the controllers firmware by default, as there 
: >are so few drives out there right now that are ultrawide.
: 
: Excellent point. In fact in the March Computer Shopper I couldn't find any
: UW drives advertised.
: 
: Peter Stein
: nbi@xnet.com
: 
I have a scsi-3 controller (fast-wide ncr825 based pci from tyan) and the 
following company sells both scsi-3 controllers and disks (conner):
Corporate Systems Center
1294 Hammerwood Ave.
Sunnyvale, CA 94089
408-734-3475

The controllers run in os/2 and suport scsi2 and scsi3 disks.  I have not 
benchmarked them for speed yet, but they seem at least as fast as my 
pio-4 and pio-3 eide disks.  The disks are available in 1050 and 2.1 gb 
sizes.  The 1 gig drive is $259.  They have a web page, but I can't 
recall the url, sorry.