fdisk not recognizing extended partitions

fdisk not recognizing extended partitions

Post by Vern Shraug » Tue, 04 Apr 1995 04:00:00

Hi!  I am trying to install the Slackware 2.2 onto my P90, 64Meg, 1Gbyte
EIDE-PCI machine.  I recently installed 2.1 without much hitch, and I
am moving to 2.2 which has XFree3.1.1 which supports my Mach64 video
card.  I'm partitioned as 420M Dos-primary, 308 Linux-logical, and
308 OS/2 logical.  This format worked fine with boot manager and
slackware 2.1, gives some problem to OS/2 because the drive letter
changes from e: to d:, side issue.  In other words, fdisk, from SW2.1,
recognized the logical partitions, /dev/hda5 and /dev/hda6, allowing
me to tag hda5 as Linux native.

But, now that I am installing SW2.2, fdisk is not recognizing the
logical partition scheme above.  It says I have /dev/hda3 which is an
extended partition.  Yes, this is true, but it is split into 2
logical drives, one for Linux and one for OS/2.  When I try to tag it,
it says it is an extended partition - delete it.  Hmmm, I can not do
that, or face a major data loss.  I've tried changing the Linux partition
to a primary partition, DOS or OS/2 can't read it anyhow, to my knowledge,
and then fdisk will allow me to tag it and move on with the installation.
After the partition format, the procedure allows me to select the partitions
to mount.  I have the option to mount /dev/hda1 which is Dos and Win but
not the OS/2 partition, /dev/hda5.  It barfs when I try it.  Cfdisk seems
to recognize the correct partition table but not fdisk and the installation

Does anyone know why the SW2.2 version of fdisk does not correctly recognize
the logical partitions?  Is there a way to work around it so I can get
the OS/2 partition mounted atleast ro?  Is there a way to install Linux,
SW 2.2, onto a logical partition, as I did with 2.1?  This may be a senselessly
crazy notion, but I installed OS/2 on a logical so that I could recognize the
Dos/Win partition(s).  This is most likely not necessary for Linux to mount
other operating systems partitions.

Thanx for any help!!!!
Vern Shrauger


1. Partition Magic does not recognize extended 15 go partition


I would like to know if some of you have the same problem as I.
I have a 30 go Maxtor Hard drive- IDE model.
I made 2 primary partition in fat 32 + 1 primary Linux partition + 1
extended partition with linux logical partitions. Partition have been
created only with partitions magic 5.0.

Unfortunately during the installation of Red Hat 6.1 disk druid or fdisk do
not recognise the hard disk which is hda. After several tried I understood
that the problem come from extended partition? It seems that Linux has
difficulty to recognise extended partitions. . Also I tried to create
partitions with Linux tools and the problem is the same.

The message error is the following which comes during the installation of
Red Hat 6.1 when I select disk druid :
An error comes during the reading of partition tables in block hda. Error
was Invalid or incomplete multibyte or wide

The bios is correctly st in LBA position and there is no problem with my

If some of you has the answer, it would be kind of you?


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