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- Newsgroups: comp.sys.apollo
- Path: sparky!uunet!psinntp!polari!lampi@polari.online.com
- From: lampi@polari.online.com
- Subject: Re: Adding second disk/controller to DN5500 by stealing from DN4000
- Message-ID: <1992Jul23.000119.5979@polari>
- Summary: Only if it is another WD7000 conntroller
- Keywords: disks, ESDI
- Organization: R Squared, Redmond, WA (206) 883-3116
- References: <1992Jul16.230532.27256@ll.mit.edu>
- Date: Thu, 23 Jul 1992 00:01:19 GMT
- Lines: 56
-
- In article <1992Jul16.230532.27256@ll.mit.edu> rocco@ll.mit.edu (A. Gregory Rocco Jr.) writes:
- >
- >I have a DN5500 with one 700 Mbyte, ESDI drive on a WD7000 controller
- >along with a 9-track tape, CD-ROMs, 8mm and an internal cartridge tape
- >on the SCSI. The WD7000 is setup as controller 0. I am running Domain/OS
- >10.3.5.1 and will soon be running 10.3.5.4.
- >
- >I have a DN4000 with two Maxtor, 380 Mbyte, ESDI, model XT-4380E drives on a
- >controller with Apollo part number 011914-001 (I believe this is an OMTI
- >8261-1D but I could only find Apollo's part number on the board).
- >
- >I would like to move the controller and the external drive from the DN4000
- >to the DN5500. (I will steal a controller from a dead DN3000 for the DN4000's
- >internal drive and I assume that I will be able to figure out how to terminate
- >the internal drive after the external one is moved).
- >
- >It is my understanding that I cannot put drives of different sizes on the
- >same controller. Which is why I am planning to add a controller to the DN5500.
-
- You *can* have drives of different sizes on the same controller. Just
- make sure they are jumpered to different drive addresses.
-
- However, you can NOT have the OMTI controller in the same Apollo AT bus
- as the WD (or any other disk) controller. It takes up too much address
- space, and two controllers would overlap. The WD controller is better
- behaved, and takes up less address space, so you CAN have two of these.
-
- >
- >Here are my questions:
- >1. Is it possible to change the strapping on the 11914-001 controller so
- > that it can live in the DN5500 as controller 1 along with my WD7000 which
- > I will leave as controller 0?
-
- See above - NO!
-
- >
- >2. I assume that with ESDI disks when there are multiple controllers/disks
- > the OS boots from the lowest unit number on the lowest controller number
- > (this is different different from SCSI disks where it boots from the highest
- > controller number).
-
- Yes.
-
- >
- >
- >Thanks much for any help/advice,
- >Greg Rocco
- >MIT Lincoln Lab
- >Lexington Ma USA
-
-
- --
- -----
- +-+ Michael Lampi lampi@polari.online.com
- |R| R Squared 16398 NE 85th St., Suite 101, Redmond, WA 98052
- +-+ (206) 883-3116 fax (206) 883-2676
-