Re: [Jfs-discussion] In need in help setting up JFS

[<pg...@jf...>]

>>> On Sun, 30 Oct 2005 11:22:39 -0500, "Jeffrey R. Born"
>>> <jb...@ch...> said:

jborn> [ ... ] Used Disk Druid to get the initial partitions in
jborn> place and though I created a LVM but didn't format it.
jborn> Nowhere did Disk Druid ask me if I wanted to use JFS.

Well, thats like it is, unfortunately; while Fedora supports
JFS, its _installer_ does not support it in its wizard.

One can still install to JFS, but one has to choose ''expert
mode'' and create partitions and filesystems manually instead of
using Disk Druid. Once the 'root' partition and filesystem is
created one can use tools like 'qtparted' to add other
partitions and filesystems, for example of JFS type.

[ ... ]

jborn> First issue df -k does not list this logical partition.

'df' lists the _mounted_ filesystems (and only those of the
mounted filesystems that are listed in '/etc/mtab', which may
not list all).

Partitions are sections of disk that may (or may not) contain a
filesystem (conceivably a partition may contain more than one,
but this would be extraordinarily weird), which is instead a
collection of files/directories.

Then even if a partition contains a filesystem, it may or may
not be mounted (which more or less means ''activated'').

Filesystems may also be inside things that are not partitions,
like a whole CD or DVD (filesystems of type 'iso9660' or 'udf'
usually), or even inside files (mountable with '-o loop').

jborn> How do I show the partitions after I have Linux installed?

The file '/proc/partitions' lists all the partitions the kernel
knows about currently (basically all those on discs the kernel
is aware of), whether or not they contain filesystems.

You can check that a partition contains a JFS filesystem with
something like 'jfs_tune -l /dev/<whatever>'.

jborn> How can I verify that my installation of FC4 has JFS
jborn> support?  Does this have to be compiled in? 

Well, JFS support is mostly part of the kernel, and all modern
kernels have it compiled in, and I occasionally use Fedora 4 and
its kernel definitely has JFS support.

jborn> With it installed/not installed can I use yum to get the
jborn> latest JFS/JFSUtils? If so where is the repo?

The JFS utilities are part of the standard Fedora Core set, and
the package name for Fedora 4 is "jfsutils-1.1.7-2.i386.rpm".