Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!unido!infbs!ramz!mopmo
From: mopmo@ramz.UUCP (Bernd Hbner)
Newsgroups: comp.unix.ultrix
Subject: Exabyte EXB8200
Keywords: TMSCP SCSI
Message-ID: <1522@ramz.UUCP>
Date: 3 Jul 90 16:56:56 GMT
Reply-To: mopmo@ramz.UUCP (Bernd Huebner)
Organization: TU Braunschweig Mechanikzentrum, Germany
Lines: 15

We would like to hear of any experience implementing a TMSCP-SCSI
controller under ultrix 3.1 on a mVax II.
We have an EXB8200 streamer (2.3 Gbyte on a video-8 cassette)
and tested two DILOG controllers (SQ703 & SQ703-A) and one
VIKING QT0 with rather bad results : SQ703 doesn't work at all,
SQ703-A reads and writes just normal, but couldn't handle
ints and LEOT, QT0 does but reads small blocks doubled. Next
controller to test will be an UC-07 from EMULEX. I wonder what
combination of errors it will present.
Performance of the two half working controllers is quite the same:
read and write speed is about 220 Kbytes/sec with 8 Kb blocks.
File spacing is about 10 times as fast and rewinding a full
cassette lasts 160 secs. Initialization is awfull slow (20 - 40 secs),
but the streamer has a 256 Kb buffer and works well together with
tar or dump/restore (@ 80 Kb/sec with dump).