"Veerraghava Reddi.Tetali" wrote:
> 
> How can I access dos extended partition from linux, for primary dos iam
> using msdos filesystem, but what is for extended partition?

*** PLEASE, PLEASE DO PUT SOME RELEVANT SUBJECT FOR YOUR MAIL!!! ***

An extended partition is a container partition. A HDD cannot have more
than a total of 4 partitions, i.e. the partition table has space for
only 4 entries. What do u do if u want to have > 4 partitions? Well, u
turn to the extended partition for help. There *cannot* be more than 1
extended partition on the HDD. So, u make 3 primary & 1 extended
partition. DOS cannot see more than 1 primary partition. So 1 primary
partition is set to DOS type and then formatted. Within the extended
partition u create n number of "logical" partitions, which can be
formatted to any file system.

So, within an extended partition u would have some logical partitions,
which are actually where the data is stored. So, as root do an fdisk on
the HDD, print the partition table using the p option. U will get a list
of partitions and file system types. Partition number /dev/hda5 and
above are in the extended partition. Assume u have the following type of
fdisk o/p:

/dev/hda1       dos >=32M
/dev/hda2       linux native
/dev/hda3       linux swap
/dev/hda4       extended
/dev/hda5       linux native
/dev/hda6       dos >=32M

so, to access /dev/hda6, i.e. drive D: u simply do:

mount -t msdos /dev/hda6 <mount_point>

Hope this helps.

sachin

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