[linux-lvm] lvextend NEVER works but screws up

[Stuart D Gathman]

Let me remind people that on RHEL5, running e2fsck on an ext4 filesystem 
will actually destroy data! Always
use fsck, which runs either e2fsck or e4fsck when e4fsprogs is 
installed.  On newer systems, where ext4 support is not tacked on as 
e4fsprogs, e2fsck handles both (but is it still a good habit to use fsck 
to run the proper checker).

On 10/04/2012 02:32 AM, tariq wali expounded in part:
>
>             resize2fs /dev/vg0/bin-logs
>             resize2fs 1.39 (29-May-2006)
>             resize2fs: Filesystem has unsupported feature(s) while
>             trying to open
>             /dev/vg0/bin-logs
>             Couldn't find valid filesystem superblock.
>
>             #this is where I would get psyched , i did the same thing
>             to all my ext2/3
>             filesystems and have extended file systems online without
>             an issue for
>             years ..but did I fforget the file system type this time ,
>             yes indeed I for
>             got we have started doing ext4 on all our new servers and
>             didn't realise
>             ext4 fancies it's own bells and whistles ..
>
>             I ran the all new resize4fs as suggested by Stuart , and
>             it made my day in
>             fact it made for the whole week's frustration :)
>
>             resize4fs /dev/vg0/logs
>             resize4fs 1.41.12 (17-May-2010)
>             Filesystem at /dev/vg0/logs is mounted on /bin-logs;
>             on-line resizing
>             required
>             old desc_blocks = 7, new_desc_blocks = 9
>             Performing an on-line resize of /dev/vg0/logs to 37408768
>             (4k) blocks.
>
>             The filesystem on /dev/vg0/logs is now 37408768 blocks long.
>

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