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From: stevem@sauron.Columbia.NCR.COM (Steve McClure)
Newsgroups: comp.sys.amiga
Subject: Re: Which SCSI interface???
Summary: Ho-Hum
Message-ID: <1701@sauron.Columbia.NCR.COM>
Date: 1 Aug 89 15:57:21 GMT
References: <730001@hpmwmdv.HP.COM> <458@tw-rnd.SanDiego.NCR.COM>
Reply-To: stevem@sauron.Columbia.NCR.COM (Steve McClure)
Organization: Tower Uniprocessor Systems, E&M-Columbia, NCR, W Columbia, SC
Lines: 62

In article <458@tw-rnd.SanDiego.NCR.COM> johnl@tw-rnd.SanDiego.NCR.COM (John Lindwall) writes:
>In article <730001@hpmwmdv.HP.COM>,markv@hpmwtd.HP.COM (Mark VanMeeter) writes:
> [ has SCSI interface ]
>
>
>> [ wants SCSI interface ] 
>
>	Performance
>
>	I just got my drive running 2 days ago.  Performance seems "blah".
>	I ran DiskPerf3 to check read/write speed.  I get 95K/sec read
>	and 41K/sec write with 1K buffer.  Performance increases with the 8K
>	and 32K buffers but read never exceeds 200K and write never exceeds
>	90K.  This is on a Quantum 80S, 19 ms ave access time.  Does anyone

This is great compared to my performance.  My A500 w/Supra and Adaptec 4000A
with a 28ms ST506 HD gives ~40K reads.  

>	Tech Support.
>	
>	Excellent.  It's not too hard to get through and they
>	seem knowledgeable and reliable.  I'll try calling them about my
>	low performance.

They are easily reached.  However, I didn't get satifactory answers about my
performance problems.  I deal with SCSI devices at work frequently and 
therefore know just enough to be dangerous.  The tech's explaination of my 
performance problems was that the ACB4000 doesn't support "blind SCSI reads."
Well, "blind SCSI reads" is not in any SCSI spec and his discription was that
the Adaptec verifies every block read/written.  I have yet to try an embedded
SCSI disk.
>
>	Software
>
>	Super! It was simple to format and partition the drive.  Many utilities
				^^^^^^
>	are supplied.  I was very impressed.  (The manual is excellent also).

Supraformat is where you specify interleave.
It didn't make any difference in my case.

>
>	Price
>
>	I dont know if their software supports streaming tape.  You could
>	call their tech support to find out: (503) 967-9081.

No, I already called.  You have to write your own device driver.  They did
volunteer source code if I send them a floppy.  I think that is a generous 
offer and will take them up on it.

I also had problems trying to backup my 10M partition with the new 1.07 
software.  It read all the files on the disk, prompted me for a floppy and
then guru'ed.  I didn't have this problem with version 1.05, but it still 
could be me or my filesystem.

Overall, I could be more satisfied, but I only spent $300 for my entire setup.
I haven't spent enough time on it to say who is at fault or even if there is a
fault.  According to the referenced postings, performance is totally acceptable
with SCSI disks.

Steve