Very Computer

by **Tom Em** » Tue, 13 Oct 1998 04:00:00

Hi everyone. Just installed FreeBSD 2.2.5-PREREL the other day (I'm a
UNIX newbie) and I finally got PPP working, now I was hoping to mount
an extended DOS partition.

BSD itself is on Secondary Master, and I boot to it using a floppy
with a modified boot.config so it defaults to 1:wd(2,a)kernel.
Primary Master is where the DOS partitions are. I am hoping to mount
the second 'logical' partition in the MS-DOS extended partition of
that drive. FWIW there are 5 logical partitions in the DOS extended
partition. There is nothing on Primary Slave, and a Sony CDU-55E
CDROM on Secondary Slave.

My problem is that I don't have a clue what the proper device node
should be for that partition. Are partitions and slices the same?
..And what are those nodes that start with 'r'? I tried a few
different nodes with the mount_msdos command and it gave me a 'bad
argument' or something like that (not quite sure of the exact wording)
regarding the device node. Can anyone either offer me a quick
explanation of either how nodes are named or what I could be doing
wrong? ..or a good URL would help too, I didn't see much in the
Handbook and FAQ though.

Thanks for helping a UNIX newbie.. d:-)>

by **J Wuns** » Wed, 21 Oct 1998 04:00:00

> BSD itself is on Secondary Master, and I boot to it using a floppy
> with a modified boot.config so it defaults to 1:wd(2,a)kernel.
> Primary Master is where the DOS partitions are. I am hoping to mount
> the second 'logical' partition in the MS-DOS extended partition of
> that drive. FWIW there are 5 logical partitions in the DOS extended
> partition. There is nothing on Primary Slave, and a Sony CDU-55E
> CDROM on Secondary Slave.

> My problem is that I don't have a clue what the proper device node
> should be for that partition. Are partitions and slices the same?

BIOS/DOS `partitions' and FreeBSD `slices' are the same. FreeBSD has
partitions of its own (denoted with trailing letters `a' through `h'),
that's why the differentiation.

The first four fdisk table slots per each drive are hard-assigned
(i. e., they have the same numbers whether there's a valid slice on
this fdisk table slot or not) to the slice names (in your example)
wd2s1 through wd2s4. Additional slices for `logical partitions' will
be available on-demand (i. e., as long as they are really present),
their numbering starts with wd2s5.

Quote:> ..And what are those nodes that start with 'r'? I tried a few

`raw' device nodes, used for everything else than mounting a
filesystem. The `buffered' nodes (without the `r') go through the
filesystem buffer cache in the kernel, which is needed for the mount
operation.

--
cheers, J"org

Never trust an operating system you don't have sources for. ;-)

Very Computer

Please help me understand IDE device node naming scheme and mounting DOS parts. ??

Please help me understand IDE device node naming scheme and mounting DOS parts. ??

Please help me understand IDE device node naming scheme and mounting DOS parts. ??