At 01:44 AM 7/10/01 +0100, you wrote: Only two DSSI and SCSI. If the disks have 5 pin power connectors they are DSSI. --Chuck

Wow, I knew they were pricey, but I didn't know they were that expensive! I guess I should have asked about it. If I knew it was two cards in one, maybe I would have bid. I would very much like to put a scsi card into my MicroVax 3400. You say, "two scsi controllers on one card", so would that be the same as dual channel? Chad Fernandez Michigan, USA Chuck McManis wrote:

At Martin, we used an early Emulex single-channel board that was considered about the least costly. The original plan was to use it to talk to WORM drives with which we replaced the TK-50, but after we found that the MAXTOR 3380 (later called 4380S), which was $1k cheaper than the 4380E (ESDI) of which we were using two, together with an EMULEX ESDI (QBUS) board, which cost about $2300 or so, we decided we liked the all-SCSI solution. It outperformed the ESDI approach by quite a little too. Unfortunately, though several vendors claimed to have SCSI WORM drives, they were all one sort or another of "modified ESDI," which meant they were all different but not standard ESDI. Apparently Lockheed had spec'd a form of nonstandard ESDI for the flight data recorder on the F-16 and they owned a subsidiary (Cherokee Electronics) that built a WORM drive with that interface. Although nobody had one working properly at the time, everybody had a version. We had to build a SCSI<=>ESDI bridge in order to demonstrate the concept. Not being terribly easy to impress, particularly with DEC-systems, I have to admit, I was VERY impressed with the way in which the little EMULEX SCSI board outperformed their own ESDI board while cutting our rotating memory system cost by nearly half. Everybody talked about the 15Mbit transfer rate on the ESDI card, yet the SCSI, which, under exhaustive testing averaged about 250 KBps under MSCP outperformed the ESDI hands down. This suggests a really decent and feature-rich implementation of the SCSI extended command set, allowing for command queueing, operation overlaps, disconnect/reconnect, etc. Dick ----- Original Message ----- From: "Chuck McManis" &lt;cmcmanis(a)mcmanis.com&gt; To: &lt;classiccmp(a)classiccmp.org&gt; Sent: Sunday, July 08, 2001 11:04 PM Subject: Re: Ended auction for qbus SCSI

This kit provides the new facilities and fixes to bring an existing VMS V3.1D system up to the V3.2 level. It must be installed on a V3.1 system. Anyone have VMS 3.1? -ethan ===== Visit "The Seventh Continent" http://penguincentral.com/penguincentral.html __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/