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Re: Qemu host drive basics.



* On 2014 19 Nov 23:58 -0600, peter@easthope.ca wrote:
>     From: Nate Bargmann <n0nb@n0nb.us>
>     Date: Wed, 19 Nov 2014 06:20:48 -0600
> > ... should have been 'groups peter'.  
> 
> peter@armada:~$ groups peter
> peter : peter adm cdrom floppy sudo audio dip video plugdev 
> 
> Group membership is OK.  

Yes, that looks correct to me.

> If I am not permitted to read the floppy, the drive motor 
> shouldn't twitch immediately after the qemu command. 
> Therefore I conclude that permissions aren't blocking access.

It has been a long time since I used a floppy drive, in fact, I just
retired my old desktop tower this past Sunday which was the only machine
left with a working floppy drive.  I could fire it up provided I still
have any floppies anywhere.

I've been using qemu but only with image files on the hard disk to fix a
development bug in a project I help maintain that had an error reported
to occur in Raspbian.  Qemu is certainly a handy tool.

> As mentioned originally, the machine will cold boot from 
> the diskette.  More detail from qemu would help but there 
> is no -v option to increase verbosity.  The man page has 
> no mention of a log file.

I'm curious if you can read the floppy directory contents using the
'mdir' command from the mtools package?  If you can do that as peter,
then  that may point to a problem with qemu.  Just a thought.

Perhaps using dd to make a raw image of the floppy and having qemu boot
from that may be an alternative.

- Nate

-- 

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us


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