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Date: Wed, 25 Aug 2004 17:56:00 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Mike <mikee AT mikee DOT ath DOT cx>
cc: cygwin AT cygwin DOT com
Subject: Re: Why umount -A is a really bad idea
In-Reply-To: <20040825210724.GG29527@mikee.ath.cx>
Message-ID: <Pine.GSO.4.61.0408251750380.6014@slinky.cs.nyu.edu>
References: <412CFBCB DOT 3040808 AT breame DOT com> <20040825210724 DOT GG29527 AT mikee DOT ath DOT cx>
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On Wed, 25 Aug 2004, Mike wrote:

> On Wed, 25 Aug 2004, Colin JN Breame wrote:
> 
> > I tried this once, just to see what would happen.  I then spent the 
> > next hour restoring the mount points.  I've learnt a valuable 
> > lesson...
> 
> Why would a 'mount -a' not work after your 'umount -a' to restore the 
> mounts?
> 
> Mike

Because Cygwin's mounts aren't the same as Unix mounts.  The mount and 
umount commands on Cygwin modify the mount table directly, so that a 
umount really is permanent.  However (and this concerns the OP, too), you 
can save the mount table as the output of "mount -m", which you can later 
use to restore the mounts.

For those unfortunate enough to have done a "umount -a" without saving the 
mounts via "mount -m", the minimum necessary mounts for Cygwin to work are

mount -sbc /cygdrive
mount -fsb c:/cygwin /
mount -fsb c:/cygwin/bin /usr/bin
mount -fsb c:/cygwin/lib /usr/lib

(that is provided that you installed Cygwin in c:/cygwin).
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

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