Hi Wolfgang,

Thank you very much for the comprehensive explanation. I understand it is
extremely difficult - even forgetting about limitations like writing in Java
- to implement a native access for Qubide disks. The DD Unix utility might
be of course an interesting option but maybe it could be more useful for SD
cards written with the QL-SD interface rather than a Qubide hard disk
(especially if it has more than one partition)

Talking more in general I think it is a pity that some possibile
implementations or bug fixes are becoming very difficult if not impossible
just because lack of the native hardware to test to the few people which
have the knowledge to solve these issues. I wonder how this could be
improved. I remember for instance Quanta many years ago had possibilities to
invest some money on QL related projects. If I could vote for a useful way
to spend this money (I mentioned Quanta just as an example) I think
maintaining compatibility and support of native QL hardware should have some

All your efforts are of course much appreciated

Kind regards



-----Messaggio originale-----
Da: Ql-Users [mailto:ql-users-boun...@lists.q-v-d.com] Per conto di Wolf via
Inviato: domenica 18 giugno 2017 09:46
A: ql-us...@q-v-d.com
Oggetto: [Ql-Users] QxlwinReader

Hi Davide,

Just to try and clear up some things about QxlwinReader.

This program reads Qubide image files. These are copies of a whole qubide
disk, copied to a simple file. I should indeed have mentioned in my reply to
you that the "dd" program I referred to is a utility that comes as standard
with Linux and allows you to copy all or part of the content of some device
to a simple file on another device. As others have mentioned, something
similar also seems to exist for windows, though I have never tried that.

QxlwinReader cannot, and will never be able to, read a disk directly. To do
that, I would either have to be able to access a real disk for a raw
read/write which, unless I'm mistaken, java doesn't allow me to do (at least
not in an OS independent way), or write a filesystem driver: one for Linux,
and another for Windows, probably yet another for Mac etc - you can see why
this isn't feasible.

Moreover, please note that QxlwinReader can only handle "LBA" type image
files, i.e. ones where files are written consecutively to the disk (FAT
allowing), without taking into account that they should be split up between
tracks, cylinders and heads. If I had an example of a Qubide disk image file
actually making use of tracks, cylinders and heads I
**might** be able to figure this out, too. I believe that Alain Haoui has
written a driver for these types of disks.

Moreover, for the time being, QxlwinReader only handles the first partition
of a Qubide disk image file. There is no reason why it shouldn't be able to
handle the other partitions, too - except that, there again, I don't have an
example of an image file with several partitions, and so would be unable to
test this. Knowing myself, letting out untested software would not be doing
you a favour...



On 17/06/2017 20:17, via Ql-Users wrote:
> Of course I misunderstood and I thought Wolfgang was referring to a 
> floppy disk transfer. Can you please provide the link for the download of
this "DD"
> utility?
> Thanks
> Davide
> -----Messaggio originale-----
> Da: Ql-Users [mailto:ql-users-boun...@lists.q-v-d.com] Per conto di 
> Peter Graf via Ql-Users
> Inviato: sabato 17 giugno 2017 20:01
> A: ql-us...@q-v-d.com
> Oggetto: Re: [Ql-Users] R: R: QxlwinReader
> Davide wrote:
>> Having had to transfer a full QL system based on SGC/Qubide to .win 
>> with 150 Mb, using DD would have been quite a nightmare.
> Why should dd be a nightmare? Are you aware that dd means a utility 
> program, not floppies?
>> [...]
>> I understand the effort to write such sw might not be negligible, but 
>> a utility which could manage to read native Qubide hard disks on a PC 
>> and transfer files to a .win file (and maybe vicecersa) I think would 
>> be very useful.
> If you have a PC with IDE port anyway, then where is the problem to 
> use dd to get the image?
> Peter
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