In the pre-windows days I was able to open the file, and write
a dummy block beyond where the file was supposed to end.  DOS
would automatically allocate all the blocks in between and
therein I would find my data.   This worked because the block
allocation was dirt simple.  Nowadays there are algorithms like
random allocation and try-to-find-a-contiguous-set-of-blocks
that this doesn't work anymore...depends how old your DOS is.

But! The other suggestion--use CHKDSK--is a much better one, if
it works.

At 02:07 PM 6/19/01 +0100, you wrote:
>I have an embedded PC104 application that logs data, however the power has
>been switched off without the program writing an end of file. Therefore the
>filename appears but with a size of zero bytes. Is there anyway of
>recovering this data. Its a dos based application and obviously I don't want
>to install any software over the top of the missing data.
>In future obviously we will be closing the file on a regular basis. Any help
>would be appreciated.
>
>Stephen Westwood

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