Manipulating DosFS volumes under Windows or Linux?


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Manipulating DosFS volumes under Windows or Linux?

Postby k8jlf » Tue, 08 Aug 2006 02:33:12 GMT

Does anybody know of a tool for windows that will let me work with
DosFS filesystems (ie: add and remove files, format a flash card with
DosFS, etc?

Failing that, if there's something for mounting one under linux, I
could deal with that as well.

I understand DosFS is close in some ways to a DOS filesystem (naming
conventions and whatnot), But it's obviously different in other ways,
since when I stick the CF card containing the filesystem in a windows
PC, it sees files on it, but the names are garbage and the sizes are

Any ideas?

Thanks in advance.

Re: Manipulating DosFS volumes under Windows or Linux?

Postby Bill Pringlemeir » Tue, 08 Aug 2006 04:41:11 GMT

It depends on how you have formatted the CF card.  If it is formatted
with 8.3 format, it would be fine.  Only the VX_LONG_NAME (don't have
docs, hope you grok) would make it incompatible to be read on a PC.

If you are an end user, you may not have an option.  If you are
developing on vxWorks/DosFs and this criteria is important, then don't
format with VX_LONG_NAME.  Most likely if you are an end user, you
could format the card on Dos/Windows and then use it with vxWorks.  I
doubt the device would reformat it (but anything can happen).

Also Leonid (the developer of DosFs) has suggested that it is much
more realiable to use the 8.3 naming convention.  With regular DOS,
there is an allocation table, a directory table and file data.  Using
an extended naming scheme adds a fourth element.  There were
synchronization/reliablity issues when using extended names.  I did
some extensive testing with random resets and the 8.3 was much more
reliable.  I did get failures that were related to TFFS ( < .5 %), but
you are using CF...

Bill Pringlemeir.

Windows programmer - every problem solved with a switch statement.
vxWorks FAQ, " http://www.**--****.com/ ~borkhuis/vxworks/vxworks.html"

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4.dosfs cp weirdness

Under unixware 714 MP4 I have a usb mounted dosfs drive (/mnt/lacie/).
When I cp or mv files with more than one extension it appears to copy 2
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a dos 8.3 name invented by the system.  I thought at first it was just
2 names pointing to the same data but they can independently deleted.
It gets weirder - notice the timestamp on the 8.3 file after the second
copy.  The file name changes but the timestamp doesn't!

# ls /mnt/lacie/LMT
# cp 00000013.tar.Z* /mnt/lacie/LMT
# ls /mnt/lacie/LMT
00000013.tar.Zaa  000000~1.ZAA
# touch x.y.z.p
# mv -f x.y.z.p /mnt/lacie/LMT
# ls /mnt/lacie/LMT
00000013.tar.Zaa  000000~1.ZAA      XYZ~1.P           x.y.z.p
# rm /mnt/lacie/LMT/000000~1.ZAA               
# ls /mnt/lacie/LMT                            
00000013.tar.Zaa  XYZ~1.P           x.y.z.p
# ls -l  /mnt/lacie/LMT
total 566
-rwxrwxrwx    1 root     root        9272296 Dec 21 11:23
-rwxrwxrwx    1 root     root              0 Dec 21 11:25 XYZ~1.P
-rwxrwxrwx    1 root     root              0 Dec 21 11:24 x.y.z.p
# touch x.y.z.p
# mv -f x.y.z.p /mnt/lacie/LMT
# ls -l  /mnt/lacie/LMT
total 566
-rwxrwxrwx    1 root     root        9272296 Dec 21 11:23
-rwxrwxrwx    1 root     root              0 Dec 21 11:25 XYZ~2.P
-rwxrwxrwx    1 root     root              0 Dec 21 14:12 x.y.z.p

Anybody know a solution to this or is it a bug? Otherwise the script
I'm working on will need a mecahnism for deleting such entries.

David Fosdike
IT Consultant
Adelaide, Australia.

david.fosdike at the google mail service (you know the one!)

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