dos won't recognize my extended dos partition

dos won't recognize my extended dos partition

Post by mezzani » Sun, 04 Oct 1998 04:00:00



  Hya!
  I'm getting a trouble in my comp.  Any help is welcome.
  I have a HD with a dos primary partition (+- 1100megs ), a dos
extended partition with 170 megs ) and 500megs for ext2 and linux
swap.
  My problem - windows or dos simply can't read from the extended dos
partition.  I don't remeber why, but the extended  partition is on
/dev/hda6, so i guess that is the problem because Partition Magic give
an error telling that when the dos partitions are not chained by order
some data could be inaccessible.  Also, the dos fdisk doesn't work,
and i can't mount the partition from linux ( it always gives errors ).

  Is there any chance to recover the data in that partition ?  Does
anyone know any program to link the partitions by my desired order, or
some other soluction?

  Thank you very much!
  mezzanine - Portugal

 
 
 

dos won't recognize my extended dos partition

Post by Rod Smi » Sun, 04 Oct 1998 04:00:00


[Posted and mailed]



Quote:>   Hya!
>   I'm getting a trouble in my comp.  Any help is welcome.
>   I have a HD with a dos primary partition (+- 1100megs ), a dos
> extended partition with 170 megs ) and 500megs for ext2 and linux
> swap.
>   My problem - windows or dos simply can't read from the extended dos
> partition.  I don't remeber why, but the extended  partition is on
> /dev/hda6, so i guess that is the problem because Partition Magic give
> an error telling that when the dos partitions are not chained by order
> some data could be inaccessible.  Also, the dos fdisk doesn't work,
> and i can't mount the partition from linux ( it always gives errors ).

>   Is there any chance to recover the data in that partition ?  Does
> anyone know any program to link the partitions by my desired order, or
> some other soluction?

You may actually have more than one problem.

The "not chained by order" thing sounds like something I ran across when I
tried Partition Magic 4.0.  It seems that PM 4.0 (and perhaps some other
programs) has problems with extended partitions in which the logical
drives are listed in an order other than their numbers -- that is, in
which, say, sda5 comes AFTER sda6.  Linux's fdisk can create such setups,
and Linux can use such drives without problems.  It may be possible to
remedy this situation by deleting the offending partitions and then
re-creating them in the appropriate order (doing both from within Linux
fdisk).  You'll have to create the new partitions with EXACTLY the correct
size, though, and I recommend backing them up completely beforehand as a
safety measure.

If Linux is giving errors, though, it sounds like you may have filesystem
corruption or some other, more serious, problem with your partition table,
either instead of or in addition to the above problem.  Exactly what
error(s) you've got I can't say.  Perhaps you could post the error
messages that Linux gives; simply saying it gives them isn't terribly
helpful.

--
Rod Smith

http://www.users.fast.net/~rodsmith
NOTE: Remove the digit and following word from my address to mail me

 
 
 

dos won't recognize my extended dos partition

Post by Liz Knu » Sun, 04 Oct 1998 04:00:00


On Sat, 03 Oct 1998 00:14:20 GMT, mezzanine spoke unto the people of
comp.os.linux.misc in these words:

Quote:> I'm getting a trouble in my comp.  Any help is welcome.
> I have a HD with a dos primary partition (+- 1100megs ), a dos
> extended partition with 170 megs ) and 500megs for ext2 and linux
> swap.
>   My problem - windows or dos simply can't read from the extended dos
> partition.  I don't remeber why, but the extended  partition is on
> /dev/hda6,

Do you by chance also have another DOS/Windows primary partition
somewhere?

If so, there is a bug in all versions of DOS:

  More than one DOS primary partition
+ Extended partition (on any drive)
--------------------------------------
= DOS partitions can't see each other
  *unless* the last logical partition in extended partition is FAT

If you do have more than one DOS/Win primary partition, the solution
is to make the very last logical partition in your extended
partition(s) formatted for DOS.

Liz
--
Elizabeth T. Knuth                                "A*roach in a tuxedo

http://www.veryComputer.com/;-Richard K. Bethell,
Internet-Centric Resources                             nanae, 6 Nov 97

 
 
 

1. how do i mount an extended dos partition or a dos logical partition ?

i need to access/share data with an NT machine (not on a network)
i have 10G removable hard drives
i am trying to put a file system on it to allow access by both linux and
NT
linux won't mount an ntfs file system
the NT person put 4 primary (?) dos partitions on the disk
and if i run fdisk in linux it sees 4 FAT16 partitions
but it will only let me mount the first one

how do i mount the other 3 ?

is there some special way the disk needs to be formated by NT ?

thanks for any help,
dan

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