Quoting TheOther <theother1510(a)sbcglobal.net>et>:
A few years ago I had trouble in booting a Linux box
that did not have
Ext2 or Ext3 for the file system. True, I wasn't using a specific
/boot partition, just a / partition.
Can you now boot with a / partition in something other than Ext2 or
Ext3? Or is the approach to use a /boot partition in Ext2 or Ext3,
and then use whatever file system you want for / and the rest of the
partitions?
The only caveat I know about is that you can't have the boot loader on
a partition with XFS, and reading the FAQ it only seems to affect LILO
and not GRUB
(
http://xfs.org/index.php/XFS_FAQ#Q:_Does_LILO_work_with_XFS.3F).
If you installed GRUB in MBR there should be no problem, assuming you
have the proper filesystem support installed. (see the *stage1_5 files
in /boot/grub).
That said I usually make a small ext3 /boot partition anyway.