svlug-extended_partitions_explained_as_microsoft_plot

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Date: Sun, 30 Dec 2001 11:08:28 -0500
From: Bryan-TheBS-Smith <b.j.smith@ieee.org>
To: hrishy <hrishys@yahoo.co.uk>
Subject: [svlug] Re: extenede partiton -- primary, extended and logical partitions

hrishy wrote:
> I have created an extended partiton under linux .but
> it is not showing up when i do df -k can anybody tell
> me how do i mount and create  a filessytem on a
> extended partiton.I am using redhat 6.2

An "extended" partition is a Microsoft'ism used to overcome the
limitations of having only 4 "primary" partitions on a fixed disk.  The
"extended" partition itself is little more than an one sector (512
bytes) "primary" partition that holds an additional partition table so
you can have 5+ partitions.  The rest of the space in an extended
partition is for creatikng one or more "logical" partitions to take
advantage of it.

Linux labels primary partitions as 1-4 (e.g., /dev/hda1)
   one primary partition can be an extended partition
Linux labels logical partitions as 5+ (e.g., /dev/hda5)
   all logic partitions are bound inside the extended partition

Again, only primary and logical partitions can be formatted and used.

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