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- =====[ =COMPUTER MATE ]=====[ 9-13-88 ]=====[ 18:38.12 ]=====
-
- 9
- How to get more than two hard disks on your system.
-
-
- What I used:
-
- 1 Western Digital 1002-27X RLL controller w/SUPER Bios Formatter ROM
- 1 Western Digital 1002-WX1 MFM controller w/SUPER Bios Formatter ROM
- 2 NEC D5126 30 MB RLL Hard Disk
- 2 Seagate ST225 20 MB Hard Disk
- 1 Disk Manager 3.1 by Ontrack Computer Systems, Inc.
- NOTE: DON'T USE VERSION 3.2
-
- I recently added two more twenty megabyte hard disks to my system to
- compliment my exsisting two 30MB RLL drives. I did not want to buy another
- large capacity drive. I wanted to make use of some drives I had lying about
- from previous upgrades. Well, what is a person to do?
-
- It is a known fact that DOS can only see two drives attached to any
- system using using an ST412 Interface, the standard run of the mill type
- of controller. The use of certain device drivers bypass the ROM and DOS
- routines for looking at drives attached to the system. Uilizing these device
- drivers allows one the use of three or four ST412 type drives. I will outline
- the procedure as follows.
-
- To connect four drives, you need two controller cards. I used two by
- Western Digital, a 1002-WX1 and a 1002-27X. The latter of which is an RLL
- type. I suggest reading the documentation with the controllers in order to
- set the jumper switches for your particular drive. I recommend the use of
- Western Digital controllers due to their high reliability factor and support.
- The Western Digital controllers MUST have the Super BIOS Roms on them. Others
- may not work properly.
- I tried DTC type controllers and found that the ROM routines on the controllers
- would not allow two to coexist properly in the same machine. You will also
- need a copy of Disk Manager by Ontrack Systems. I don't know the extent of
- this, but version 3.2 did not work on my system. I used version 3.1 without
- a hitch.
-
- The first step is to set the ROM and I/O addresses for each of the con-
- trollers. Select which controller you would like to use as the first one.
- I chose the RLL controller to be my "boot" controller. I will here out refer
- to the RLL controller as controller 1 and the standard controller as controller
- 2. Since these boards are relatively similar, the jumper settings are also
- similar. Western Digital provides two jumpers to change the addresses of the
- controllers. These are refered to as W4 - Device address and W8 - controller
- ROM address. The default configuration, and the one to use for controller 1,
- should be W4 jumpered on pins 2 and 3 (320H) and W8 jumpered on pins
- 2 and 3 (C800). Connect the drives as you normally would for a single
- controller system. (Refer to bulletin #34 Installation using 1002-WX2
- controllers).
-
- Next, take controller 2 and configure it with jumper W4 using pins 1 and 2
- (324H) and W8 using pins 1 and 2 (CA00). Again connect the two drives as you
- normally would for a single controller system.
-
- The next step is to install the two cards into the machine and boot the
- system. A long wait and a few errors may occur if they are new drives that
- are not prepared yet. After the system is booted, put your disk with
- DEBUG.EXE on it into the drive. Run the program, and at the "-" prompt, type
- "G=C800:5 <RETURN>" less the quotes. You will need to repeat this step for
- each drive, c: d: e: f:. It prompts you for the drive. Use it's recommended
- interleave factor for now. You can play with that one after you know it is
- working. Follow the controllers directions for this initialization process.
-
- When finished, you will need to get out your Disk Manager Disk by Ontrack
- Data Systems. Run Disk Manager in manual mode and create a partition on each
- of the hard disks. Do not use FDISK to do this. Disk Manager writes specific
- stuff to the disks in order to find them. Set up the first disk and partition
- as a "DOS" type partition and the other three as "WRITE/READ" partitions.
-
- Next, you must prepare each partition using Disk Manager. This does a
- DOS type format. DONT USE YOUR DOS'S FORMAT UNLESS YOU HAVE TO. After all
- four drives have been partitioned and prepared for use, you should be ready
- to boot up again. This is where the first headaches start to come in. My
- system is run on a Leading Edge Model D. After using Disk Manager, I was
- unable to boot even from a floppy. It would crash while reading in the system
- files. I tried many, at least a dozen, different versions of DOS from many
- different machines. As it turns out, I had to use a DOS which had
- compatibility software written into it. I did not want to use DOS 2.11 which
- came with my system so I purchased a copy of AST DOS 3.2 which did the trick. I
- suspect that those with IBM's will not have a problem.
-
- At this point, when you boot your system from the DOS disk, you should
- only be able to get to drive C:. Follow Disk Managers instructions to install
- their device driver DMDRVR.BIN into your config.sys file if not already there.
- Next time you boot your system, it should look at all four drives as it loads
- the device driver. You should now get access to c: d: e: and f:.
-
- If you have any problems, I will be more than willing to help you out.
- Listed below are some numbers and addresses you may find useful. Good luck.
-
-
- Ontrack Computer Systems, Inc.
- 6222 Bury Drive
- Eden Prairie, MN 55344
- Product info: 800-752-1333
- Tech support: 612-937-2121
-
- Western Digital
- 2445 McCabe Way
- Irvine, CA 92714
- Tech Support: 800-847-6181
-
- Seagate
- 920 Disc Drive
- Scotts Valley, CA 95066-4544
- Product Info: 800-468-3472
-
- Blaine Korcel
- DATA: 703-256-4777 NOVAC RBBS 2400 BPS
- VOICE:703-256-4430 6PM-10PM EASTERN
-
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