create filesystem on md - RAID device

[Franz Waldmüller]

Hi I got a question concerning the creation of a new filesystem on a 
raid1 device (let's call it /dev/md7).
I am running ubuntu 9.10 i386 desktop edition.

I just want some advice if my approach is correct:

if /dev/md7 is mounted as /home I intend to do the following (as root):
umount /home
mkfs.ext4 /dev/md7 # should I add any options?
then I have to correct the /etc/fstab file with the new UUID of the 
created filesystem

I run
blkid /dev/md7

And then I have to try to get this output into my fstab file. Any hints 
how I can do this on the command line without running X? I have some 
basic knowledge of using nano. Maybe I can run a command which attaches 
the output of blkid to the fstab file. The only thing left would be to 
move the UUID up to the right position in the fstab file

after
mount -a
everything should be up and running again?
Am I correct?

Thanks for your help.
Franz