Re: mkisofs on usb hard drive key


Dances With Crows wrote:
On 17 Jul 2006 16:13:32 -0700, heavytull staggered into the Black Sun
and said:
Dances With Crows wrote:
heavytull wrote:
root@headmuz:/mnt/cdrom/kernels# fdisk /dev/sdc
[ heavytull creates 1 partition ]
# mkdosfs -I -F32 -n slack -v /dev/sdc
# mount /dev/sdc1 /mnt/pen_drive/
mount: you must specify the filesystem type
You created one partition, then mkdosfs'ed the *entire disk*. You
probably wanted to mkdosfs -F32 /dev/sdc1 .
ho sorry, I [didn't] notice the "1".

When you work with computers, Details Count. (The difference between
"rm -f *.tmp" and "rm -f * .tmp" is *huge*!)

I know,

ok, I'll try again, but I remember when I made 4 partitions some time
before I didn't make that error and got an error message like "can't
find disk geometry"

Wait. Did you do this?

fdisk /dev/nnn
(create 1 partition of type 0x0b on /dev/nnn)
mkdosfs -F32 -I /dev/nnn1

yes

...using -I on a partition (not a full device) may cause weird things to
happen.
I didn't know that!
I always do that for floppies, that works fine.

I'd have to look at mkdosfs's source to find out exactly what.
Or, it's possible that the kernel didn't re-read the partition info from
the disk.
I wouldn't believe so.
anyway I have already seen so many misconceptions in the programming
world and massevely used that perhaps what you say is true.

So next time you fdisk a USB device, you *may* want to unplug
and re-plug the device after fdisk returns, and see if that helps.

actually I think I did unpug and replug the device, because I had a
winXP pc besides and I sometimes put the device in it just to see what
it would say.
and since my goal was to figure out how to use mkdosfs properly I
didn't format the usb mass storage HD under winXP, instead I put it
back into linux box and AFAIK I reatempted to use mkdosfs.
one thing is sure: I finally could make mkdosfs work but I actually
used the -C option to generate the fs into a file that I cat >/dev/sdcx
or dd...

I'd try everything again and mark the results.

--
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
Brainbench MVP for Linux Admin / mail: TRAP + SPAN don't belong
http://www.brainbench.com / "He is a rhythmic movement of the
-----------------------------/ penguins, is Tux." --MegaHAL

.

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