Reading ESDI disks
nw.johnson at ieee.org
Thu Feb 11 11:33:50 CST 2021
I'm about to try the very same thing.
I have a MicroVAX II with a sigma MSCP ESDI controller. It can be set
for soft-secoring or various numbers of hard sectors. That is what I
see is the big issue with these drives.
A friend gave me two drives that had been written on a PC under *nix.
I do have some cable problems which I have to work on, but my first
power-up revealed one of the drives and said it recognised the fact that
it had 36 sectors. However when I tried to read it, it hung. More
experimentation needed, but I am sure if the controller will read the
blocks I will be able to extract an image to send to my friend to decode :-)
let's exchange notes as we proceed. My effort is inter-twined with
various other actoivities so I can't say when.
Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype: TILBURY2591 nw.johnson at ieee.org
On 2021-02-11 12:25 p.m., Mattis Lind via cctalk wrote:
> What is the best way of dumping the contents of an ESDI disk?
> I have an original IBM Enhanced ESDI ISA controller board. Could that be
> used under Linux? Or NetBSD/FreeNSD? I googled but didn't find much.
> Is there any other way of dumping the disk contents?
> In theory it should be just a matter of clocking the raw data and finding
> the marks and extracting the data. Has anyone done something similar?
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