Creating ext3 file systems
The ext3 filesystem is a journaled file system that is
compatible with ext2 (an ext3 filesystem can be mounted as ext2 if
necessary). It's faster and more reliable than ext2, and therefore
has become popular (though so has Reiserfs).
This poster had difficulty creating an ext3 filesystem. Not so
long ago, you'd do this by first making an ext2 filestem and then
converting it with
tune2fs -j /dev/hdXX
A bit later, you could do that directly with:
mke2fs -j /dev/hdXX
and now you can use
I can't find a man page that says you can do "mkfs -t ext3
/dev/hdXX", but that does turn up in posts, so maybe it is in a
newer version than I have.
However, this poster's problem wasn't really to do with ext3 at
all; it was actually a problem with fdisk and the kernel.
If you modify or create a partition on a disk that has other
mounted partitions, fdisk will tell you:
WARNING: Re-reading the partition table failed with error
16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
If you ignore that, or didn't see it, you are going to get
errors when you try to create a filesystem on your new partition.
That's what apparently happened here - the fix is simply to reboot.
Note that this only applies if the disk being modified has mounted
partitions: if you could unmount the other partitions or were using
a disk without other partitions, you wouldn't need to reboot and
could proceed directly to making your filesystems.
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