[Coco] More NitrOS9 fun

[Bill Pierce]

Bill, mounting various size disks in /Xx to be formatted can be disastrous if not done properly. For instance, the drive descriptors for the "/Xx" drives are an odd size. They do not match the average VHDs found on the net and will format those image improperly if the descriptor is not changed or format not set for the image. As a default, if you stick a floppy disk image in a dw slot and just type format /Xx... it will try to format at the default size of the descriptor.
Also, dw is designed for "dynamic" disk sizes, meaning, a disk created with dw will have the size of "0" but will grow up to the descriptor size as you use it and fill it up.
Anytime you format with a dw drive, you MUST set the disk format and size manually in the format cmd line. Even better, set the descriptor size with dmode to match the disk image.

 

 

Bill Pierce
"Charlie stole the handle, and the train it won't stop going, no way to slow down!" - Ian Anderson - Jethro Tull

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-----Original Message-----
From: Bill Gunshannon <bill.gunshannon at hotmail.com>
To: coco <coco at maltedmedia.com>
Sent: Mon, Feb 19, 2018 12:31 pm
Subject: [Coco] More NitrOS9 fun


And here is yet another interesting data point.

I decided to try using a disk on Drivewire instead of the real floppy.

I boot from Disk 0 (would be /x0 but seems to only be /dd) and tried to

format /x1 manually.  Identified it as a hard disk and asked the usual

questions (even though I had used the "r" option which is supposed to

mean "Ask no questions".  Format starts, runs a few minutes putting

the usual info to the screen.  Then system crashed, rebooted but failed

on the reboot.  It now looks like it trashed /x0 as the system will not

boot at all from that image.    :-(


bill


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