[iyonix-support] Re: Pen drive problems after upgrading
- From: Nick Roberts <tigger@xxxxxxxxxxxxxxxxxxxxx>
- To: iyonix-support@xxxxxxxxxxxxx
- Date: Wed, 21 Mar 2007 17:56:23 GMT
In message <4ec7024ea8jack@xxxxxxxxxxxxxx>
Jack Evans <jack@xxxxxxxxxxxxxx> wrote:
> USB problems after upgrading to 5.13 and the new nVidia card which
> are being discussed in another thread prompt me to report that, after
> the same upgrading, neither of my two pen drives (one a SanDisk
> 256MB, other not known) are recognised.
>
> Previously all was well but now neither show up on the iconbar even
> after USBKick or from the front or back USB slots. Also I note that
> the 'Convential SCSI' area of the Discs configuration window is
> greyed out.
This posting led me to try my 0.5GB pendrive, and I discovered some odd
problems.
1. Copied an ArtWorks file (the 4.02 Boot diagram, 854,136 bytes) from
HD to pendrive. It all worked fine.
2. I dismounted the pendrive (but did not remove the pendrive),
and then clicked on the pendrive icon again. The file loaded into
ArtWorks (under Aemulor) without any problems.
3. Dismounted the pendrive and removed it. Then re-inserted it, waited
for the icon to appear, opened the disc and double-clicked the file.
ArtWorks reported an "Abort on data transfer" and quit. NB - the file
on the pendrive showed exactly the same size as the original.
This is repeatable.
There is no doubt that the problem is the file itself, rather than
running it from the pendrive, as copying back to the HD and running it
from there caused the same problem. I've tried with other files of
similar size (e.g. a JPEG of 850,897 bytes) and this survived a two-way
trip (with removal).
However, if I copy another file to the pendrive first (the JPEG
referred to above), then copy the Artworks file, the file survives a
dismount/remove/insert cycle.
This led me to the conclusion that the pendrive itself may be faulty,
so I tried exactly the same thing from my WinXP box: I copied the
Artworks file to the PC overthe network, then copied the file from the
PC to the pendrive, dismounted the pendrive from the PC and mounted it
on my Iyonix. In this case ArtWorks would load the file without a
problem. This also is repeatable.
Does this demonstrate that it is not the pendrive at fault? i.e. do PCs
and DOSFS use different mechanisms for deciding what part of the
pendrive to use for a file, or does the SCSI interface protect the OS's
from that level of detail?
<Aside>
This also confirmed something I had noticed before with floppy discs -
long filenames that appear fine on the Iyonix frequently appear
truncated to 6 chars + tilde + digit + extension on the PC. It appears
that what DOSFS thinks the format should be is somewhat at variance
with what WinNT and WinXP think it should be.
--
Nick Roberts tigger @ orpheusinternet.co.uk
Hanlon's Razor: Never attribute to malice that which
can be adequately explained by stupidity.
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