Date: Thu, 25 Apr 2002 15:05:53 +0000
From: "neil barnes" <[EMAIL PROTECTED]>
Subject: Re: [LIB] Phantom disks??


>Date: Thu, 25 Apr 2002 14:37:39 +0100 (GMT/BST)
>From: Digby Tarvin <[EMAIL PROTECTED]>
>Subject: Phantom disks??
<phantom of the opera libretto>

All I can say is that windows is broken on its *own* fdisk specification...
>
>The final curiosity is that Windows tells me the extended partition is
>completely empty. If doesn't show the Linux partitions as non-DOS as
>I would have expected, but appears not to be able to see them at all.

Usually seems to show them as empty but won't allow you to erase it on the 
grounds that it isn't. I've had to use linux fdisk (or friends) to erase an 
83 partition before now, and micro~01 is very unhappy about formatting a 
partition it didn't fdisk (e.g. linux fdisk two partitions, the first one a 
bootable vfat and the second a linux 83, then ask windows to format the 
first. It stomps the second...)

>
>I suspect if I asked it to make a logical DOS drive, it would happily
>do so, overwriting the Linux partitions. Clearly there is some 
>compatibility
>problem between Windows and Liniux created extended partitions which
>means that if I wanted a Windows partition, I would have had to have
>created that first in the extended drive.

Yes, in windows/dos.

>
>So the puzzle I have is - why is Windows showing the extra drive, and
>where abouts on the disk is it??? Is there any way to find out what is
>happening without destroying some other part of the disk?
>

It might be worth reading the MBR and the volume boot records that define 
the partitions with a hex disc editor - but I bet it'll make headaches :)

>Any guesses?
>
>Here is how Linux sees my partitioning:
>rover:/home/digbyt/boot # fdisk -l /dev/hda
>
>Disk /dev/hda: 255 heads, 63 sectors, 2432 cylinders
>Units = cylinders of 16065 * 512 bytes
>
>    Device Boot    Start       End    Blocks   Id  System
>/dev/hda1             1       195   1566306    b  Win95 FAT32
>/dev/hda2           196       390   1566306   9f  BSD/OS
>/dev/hda3           390       584   1558336+   b  Win95 FAT32
>/dev/hda4   *       585      1390   6474195    f  Win95 Ext'd (LBA)
>/dev/hda5           585       601    136521   83  Linux
>/dev/hda6           602       613     96358+  82  Linux swap
>/dev/hda7           614       679    530113+  83  Linux
>/dev/hda8           680       941   2104483+  83  Linux
>/dev/hda9           942      1018    618471   83  Linux
>/dev/hda10         1019      1028     80293+  2a  Unknown
>/dev/hda11         1029      1290   2104483+  83  Linux
>/dev/hda12         1291      1943   5245191   83  Linux
>/dev/hda13         1944      2431   3919828+  83  Linux
>

I wonder if there's any relevance in the fact that you have the extended 
partition set as bootable/active? Windows is unhappy about anything other 
than the first partition set as bootable, maybe changing that will alter 
things?

Neil

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