Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!bellcore!tness7!ninja!cpe!neese
From: neese@cpe.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: FAST AT BUS & Hard Disk Combo Neede
Message-ID: <12400018@cpe>
Date: 28 Sep 88 20:36:00 GMT
References: <25160@teknowledge-vaxc.ARPA>
Lines: 25
Nf-ID: #R:teknowledge-vaxc.ARPA:25160:cpe:12400018:000:1381
Nf-From: cpe.UUCP!neese    Sep 28 15:36:00 1988


>	Has anyone put together any IBM-AT-compatible configuration that
>permits the dumping of 44-megabytes/minute of data to a hard disk? I've
>been told that there are high-speed buses available for special-purpose
>applications, but I've not been able to find them.  Also, can anyone
>recommend fast hard disks for this purpose?

Well, that is about .73Mbyte/sec.  (730KB/sec).  One of the things you didn't
mention;  Are you dumping data in large chunks (>16K) or one sector at a
time.  If you are doing large chunks, then you can easily get that type of
performance with the Adaptec SCSI Adapter (AHA-1540, Tandy 25-4161), and
a resonable SCSI Hard Drive.  You didn't mention the size of the hard drive
either.  If high speed writing is your goal, then I would recommend the CDC
Wren IV/V drives.  If your need super fast data acquisition, then I recommend
the Quantum P40/80 drives.  The CDC drives, when writing large chunks, could
easily achieve 50MBytes/minute with this combination of Adapter/Drive.  The
Quantum drives could easily provide throughput in excess of 60MBytes/second
while reading.
  Of course, on the other hand, if you use a Future Domain TMC-830 and a
Conner 40MB drive, then you might be able to get to 22MByte/second.  If
you stand on one foot and hold your breath.

					Roy Neese
					Tandy Computer Product Engineering
					UUCP@ killer!ninja!cpe!neese