Which MO disk for VMS or Ultrix?
AJ Casamento
ajc at thendara.pa.dec.com
Sat Jun 22 05:48:14 AEST 1991
In article <1991Jun21.050702.18342 at newshost.anu.edu.au> david at phys.anu.edu.au (David Baldwin) writes:
>> I want to run a magneto-optical (or all-optical) read-writeable removable disk
>> on VAXStation 3100s running VMS or DECStation 3100/5000-200s running Ultrix.
>> I would like to hear from anyone who has connected such a device directly to
>> the SCSI bus, and what drivers or hardware adapters are required. I know that
>> solutions exist for UniBus or Q-bus machines that do their own emulation, or
>> for SUN workstations directly to SCSI, but I need information about direct
>> SCSI connections to DEC workstations.
>> Thanks in advance,
>> David.
David,
A couple of recommendations that I can make to you for the DS5000/xxx
series machines:
Ten X Technology, Inc.
4807 Spicewood Springs Rd. 512.346.8360 Margaret Williams
Building 3, Suite 3200 512.346.9580 FAX
Austin, TX 78759
OptiXchange (WORM & Magneto Optical)
This device is a multifunction optical disk subsystem
capable of reading and writing both WORM and Erasable
(M-O) media from the same drive. It is compatible with
the VMS, ULTRIX, and other computer operating systems.
Features include automatic detection of media type and
access to historical data through "timestamping".
MAXOPTIX Corporation
2520 Junction Avenue 408.954.9700
San Jose, CA 95134 408.954.9711 FAX
TAHITI
Highest cpacity MO-erasable drive on the market.
Accepts ANSI standard 650 Mbytes or 1 Gbyte of media.
Embedded SCSI-2 controller. Highest sustained data
transfer rate: 600 Kbytes/second READ; 300 Kbytes/second
WRITE. Fastest seek time 35msec average for 650 Mbyte
media; 25msec for 1 Gbyte data. Standard 5.25 FH
footprint. Supports 512- or 1024-byte sectors. Media
removability can be software controlled.
Both of these companies are TRI/ADD Program members and I have seen
their products run on DS5000/200 series machines (I have even seen
the TAHITI used as a system disk...but it's pretty slow). I have not
seen them used on VMS machines so I can't vouch for that. All of the
information here is presented by the respective companies and I make
NO warranty for performance (but tell them I said hello).
If you are interested in some additional documentation on DEC's SCSI
implementations (particularly the port class driver for VMS) you can
find postscript files on (available for anonymous ftp):
gatekeeper 16.1.0.2
pub/TriAdd
There is both a SCSI Overview and a Developer's Guide available
there. I hope that this information helps.
Thanx,
AJ
**********************************************************************
* AJ Casamento "The question is not whether or *
* Digital's TRI/ADD Program not the opinions are mine; but *
* 100 Hamilton Ave. UCO1-B rather, which of my personalities *
* Palo Alto, CA 94301-1616 do they belong to?" *
* 415.853.6744 *
* ajc at decwrl.dec.com *
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