Hi all,
On Mon, Jun 10, 2002 at 10:09:20AM +0300, Daniel Feiglin wrote:
>
>
[snip]
> >
> >What question? Of creating ext3? That's simple: mke2fs -j.
> >Converting ext2 to ext3? tune2fs -j (Note I havn't tried
> this one,
> >only mk).
>
> What you describe is exactly what DID NOT work and at the
> time was the subject of some rather inconclusive discussions
> elewhere. The question of how you convert an ext2->ext3 or go
> directly from something else e.g. FAT32 remains open.
>
#dd if=/dev/zero of=ttt1 bs=1024k count=100
100+0 records in
100+0 records out
#mke2fs ttt1
mke2fs 1.26 (3-Feb-2002)
ttt1 is not a block special device.
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
25688 inodes, 102400 blocks
5120 blocks (5.00%) reserved for the super user
First data block=1
13 block groups
8192 blocks per group, 8192 fragments per group
1976 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 23 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
#dmesg -c
#mount -t ext3 -o loop ttt1 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
or too many mounted file systems
#dmesg
ext3: No journal on filesystem on loop(7,0)
#mount -t ext2 -o loop ttt1 /mnt
(no answer)
#umount /mnt
(no answer)
#tune2fs -j ttt1
tune2fs 1.26 (3-Feb-2002)
Creating journal inode: done
This filesystem will be automatically checked every 23 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
#dmesg -c
#mount -t ext3 -o loop ttt1 /mnt
(no answer)
#dmesg
kjournald starting. Commit interval 5 seconds
EXT3 FS 2.4-0.9.16, 02 Dec 2001 on loop(7,0), internal journal
EXT3-fs: mounted filesystem with ordered data mode.
#uname -a
Linux pinky 2.4.17 #4 Mon May 27 19:28:31 IDT 2002 i686 unknown
Is this good enough?
Repeating myself: This has _nothing_ to do with fat->ext[23]
conversions, which are _much_ more problematic.
ext2 and ext3 have the same on-disk structure, by design. The only
difference is the journal, which is usually a file (but can also
be e.g. on another device).
> >
> Daniel Feiglin
Didi
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