From: Chris Robinson 


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From the discussion here it seams like it was a valid switch at least at
some point in the past?  Is it just a case of not being valid any more?

Chris.

Rich wrote:

>    Don't bother.  /U is accepted and ignored.  It does nothing. Rich
>
>      "Geo."  wrote in message
>      news:3e9b38eb$1{at}w3.nls.net...cool, that is useful. I added a
>      note on my website about that one so I don't
>      lose it.
>
>      Geo.
>
>      "Chris Robinson"  wrote in
>      message
>      news:3E9AA49B.78ED7B90{at}NOSPAMtotalise.co.uk...
>      > I hadn't heard of this one before so I thought I'd share
>      it with you.  A
>      > while back I was looking for DOS utilities that would
>      completely wipe a
>      > hard drive.  I found some useful ones (usually from the
>      manufactureres
>      > of the drive).  Today I found this tip in an issue of
>      "Computing":
>      >
>      >     Use the undocumented "U" switch when formatting a
>      drive.  It's a
>      > switch that tells Format to rewrite sectors irrespective
>      of what's in
>      > them.  e.g. "FORMAT C: /U" will rewrite all the sectors
>      irrespective of
>      > what's in them.
>      >
>      > Pretty useful I thought, although it did remind me of the
>      annoying
>      > amount of "undocumented" switches - why are they
>      undocumented?  "hey,
>      > our software can do this task but we're not going to tell
>      you about it"
>      >
>      > Chris.
>      >
>
>

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From the discussion here it seams like it was a valid switch at least at
some point in the past?  Is it just a case of not being valid any
more?
Chris.
Rich wrote:

  
Don't bother.  /U is accepted and ignored.  It does
nothing. Rich 
"Geo."
<georger{at}nls.net>">mailto:georger{at}nls.net">georger{at}nls.net>
wrote in message
news:3e9b38eb$1{at}w3.nls.net...cool,
that is useful. I added a note on my website about that one so I don't
lose it.
Geo.
"Chris Robinson" <c.robi">mailto:c.robinson{at}NOSPAMtotalise.co.uk">c.robi
nson{at}NOSPAMtotalise.co.uk>
wrote in message
news:3E9AA49B.78ED7B9
0{at}NOSPAMtotalise.co.uk...
> I hadn't heard of this one before so I thought I'd share it with
you.  A
> while back I was looking for DOS utilities that would completely
wipe a
> hard drive.  I found some useful ones (usually from the
manufactureres
> of the drive).  Today I found this tip in an issue
of "Computing":
>
>     Use the undocumented
"U" switch when formatting
a drive.  It's a
> switch that tells Format to rewrite sectors irrespective of what's
in
> them.  e.g. "FORMAT C: /U" will rewrite
all the sectors irrespective
of
> what's in them.
>
> Pretty useful I thought, although it did remind me of the annoying
> amount of "undocumented" switches - why are they
undocumented? 
"hey,
> our software can do this task but we're not going to tell you about
it"
>
> Chris.
>
 





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