Re: CMD HD mechanism failure?

From: OldWoman37 <rmusced_at_uwindsor.ca>
Date: Sat, 30 Jan 2021 20:03:29 -0600 (CST)
Message-ID: <1612058609400-0.post_at_n4.nabble.com>
Is the data on the drive important? If so, it may still be recoverable using
a linux box and a SCSI card. There is a great program called "ddrescue"
which will try to copy every sector, but skip the bad ones. I've used it
many times to recover data.
Apart from that, the only thing you need to do when setting up a new drive
is set the SCSI ID to 0, and you can turn off parity, but from my
disassembly of the HD-DOS, it does handle it properly. Those other jumpers
should probably be left alone (I would assume WP is write protect).
When you do turn on the CMD-HD with the new drive, be sure to hold down both
SWAP 8 and SWAP 9 for a few seconds. This will put the drive into
installation mode or else it will try to search the WHOLE drive for the DOS
and this could take a very long time; the serial bus will be hung while this
happens. When you have it in installation mode, you should then be able to
reinstall the HD-DOS. I assume since you were running it with a 2GB disk
previously, you should already have a 2.8 boot rom.



--
Sent from: http://cbm-hackers.2304266.n4.nabble.com/
Received on 2021-01-31 04:00:02

Archive generated by hypermail 2.3.0.