From: "Geoffrey C. Grabow" <gcg@pb.net>
Date: Sun, 4 Aug 1996 16:37:48 +0800
To: cypherpunks@toad.com
Subject: WARNING: SecureDrive & PartitionMagic
Message-ID: <2.2.32.19960804064926.006b59d0@mail.pb.net>
MIME-Version: 1.0
Content-Type: text/plain


It seems rather obvious now, but since I learned the hard way, I figured
that I'd save the rest of you from a painful experience.

I have one HD of 1.2gb.  I created a 50mb partition at the end of the drive
using PM and encrypted it with SD14b.  I ran out of room on the secured
partition and wanted to enlarge it.  I used PM to shrink the primary
partition a little, and to enlarge the secured partition.  When I shrank the
primary, the free space on the drive appeared between the two partitions.
To enlarge the secondary, I moved it to the free space, then enlarged it on
the right.  This was BAD!  PM did its thing, but no matter what I did after
that, I couldn't get the secured partition to a usable state.  I ended up
formatting the secured partition to recover.  

After some playing, it seems that PM tries to "re-align" the data on the 2nd
partition when you move left.  That's where things get screwed up.  I tested
a few combinations, and found that everything works fine if you decrypt the
partition before moving/resizing, then re-encrypt after.

Just some friendly info.  

 
                                                     G.C.G.

 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 | Geoffrey C. Grabow       |      Great people talk about ideas.       |
 | Oyster Bay, New York     |     Average people talk about things.     |
 | gcg@pb.net               |      Small people talk about people.      |
 |----------------------------------------------------------------------|
 |     PGP 2.6.2 public key available at http://www.pb.net/~wizard      | 
 |          and on a plethora of key servers around the world.          |
 |   Fingerprint =  A6 7B 67 D7 E9 96 37 7D  E7 16 BD 5E F4 5A B2 E4    |
 |----------------------------------------------------------------------|
 | That which does not kill us, makes us stranger.   - Trevor Goodchild |
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~