Re: Memory Stick Life Span

On Sun, 23 Oct 2005 09:48:56 -0700, Bill Funk wrote:

>>> As far as I know, when a file is deleted, the OS marks the old
>>> filename with a character that lets the OS know that space is
>>> available for writing. I really don't know of an OS that then 'saves'
>>> that space on the media to allow undeleting.
>>
>>DOS and Windows do this. It's how all the "card recovery"programs
>> work.
>
> No, it's not.
> Such recovery programs work *IF and Only IF* the files haven't been
> overwritten.
> DOS and Windows make no effort to preserve deleted files.

DOS didn't, although there were a number of disk utility suites
available for it that managed deleted files to allow them to be
safely undeleted. But even Windows95 has a Recycle Bin. Not quite
as thorough as some of the earlier DOS utilities, but it also
provides some support to prevent deleted files from being
overwritten so that they can be easily recovered. You've never seen
a Windows popup, warning that there's no more disk space and asking
if you want to delete some files from the Recycle Bin?

.

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