[linux-lvm] Problems with e2fsadm

[linux-lvm] Problems with e2fsadm

[Torsten Neumann]

Hi,

I'm having some problems with e2fsadm when using 4096 as blocksize for my
ext2 filesystem. e.g
	lvcreate -L 100 -n /dev/vg00/lvoltest vg00
	mke2fs -b 4096 /dev/vg00/lvoltest
	e2fsadm -L 200 /dev/vg00/lvoltest
gives something like
	...
	lvextend -- logical volume "/dev/vg00/lvoltest" successfully extended

	ext2_resize_fs: your container (i.e. the file or partition the
					filesystem) is in is not big enough for a filesystem of
					204800 blocks (it's only 51200 blocks)

If using resize2fs instead of ext2resize I got the similiar message

	The containing partition (or device) is only 51200 blocks.
	You requested a new size of 204800 blocks.

Extending ext2 Filesystems on non logical volumes (/dev/sd...) works fine
even if using 4096 as blocksize.
Looking at the ext2resize code it seems to me that ext2resize is doing the
right thing, therefor my guess is that there is some bug in the lvm code.
Looking at LVM I find in tools/lib/liblvm.h
	#define BLOCK_SIZE 1024
but I don't understand if this has something to do with the above problem.
BLOCK_SIZE seems to be used in vg_setup_for_extend to check if there is room
for extending. But I don't see what it has to do with the wrong result of
the llseek call in ext2resize.

Maybe here is someone smarter then me and could tell me what's going wrong.
Would be nice if resizing works for all blocksizes.

Regards,
	Torsten

Re: [linux-lvm] Problems with e2fsadm

[Heinz Mauelshagen]

Hello Torsten,

e2fsadm simply is buggy in 0.7 when dealing with ext2 4k block sizes.
This will be fixed in 0.8.

Workaround grow  : e2fsck, lvextend, resize2fs
Workaround shrink: e2fsck, resize2fs, lvreduce

Regards,
Heinz

> 
> I'm having some problems with e2fsadm when using 4096 as blocksize for my
> ext2 filesystem. e.g
> 	lvcreate -L 100 -n /dev/vg00/lvoltest vg00
> 	mke2fs -b 4096 /dev/vg00/lvoltest
> 	e2fsadm -L 200 /dev/vg00/lvoltest
> gives something like
> 	...
> 	lvextend -- logical volume "/dev/vg00/lvoltest" successfully extended
> 
> 	ext2_resize_fs: your container (i.e. the file or partition the
> 					filesystem) is in is not big enough for a filesystem of
> 					204800 blocks (it's only 51200 blocks)
> 
> If using resize2fs instead of ext2resize I got the similiar message
> 
> 	The containing partition (or device) is only 51200 blocks.
> 	You requested a new size of 204800 blocks.
> 
> Extending ext2 Filesystems on non logical volumes (/dev/sd...) works fine
> even if using 4096 as blocksize.
> Looking at the ext2resize code it seems to me that ext2resize is doing the
> right thing, therefor my guess is that there is some bug in the lvm code.
> Looking at LVM I find in tools/lib/liblvm.h
> 	#define BLOCK_SIZE 1024
> but I don't understand if this has something to do with the above problem.
> BLOCK_SIZE seems to be used in vg_setup_for_extend to check if there is room
> for extending. But I don't see what it has to do with the wrong result of
> the llseek call in ext2resize.
> 
> Maybe here is someone smarter then me and could tell me what's going wrong.
> Would be nice if resizing works for all blocksizes.
> 
> Regards,
> 	Torsten
> 


--

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Systemmanagement CS-TS                           T-Nova
                                                 Entwicklungszentrum Darmstadt
Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
Senior Systems Engineer                          Postfach 10 05 41
                                                 64205 Darmstadt
mge@ez-darmstadt.telekom.de                      Germany
                                                 +49 6151 886-425
                                                          FAX-386
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] Problems with e2fsadm

[Michael Marxmeier]

> I'm having some problems with e2fsadm when using 4096 as blocksize for my
> ext2 filesystem. e.g
>       lvcreate -L 100 -n /dev/vg00/lvoltest vg00
>       mke2fs -b 4096 /dev/vg00/lvoltest
>       e2fsadm -L 200 /dev/vg00/lvoltest
> gives something like
>       ...
>       lvextend -- logical volume "/dev/vg00/lvoltest" successfully extended
>
>       ext2_resize_fs: your container (i.e. the file or partition the
>                                       filesystem) is in is not big enough for
a filesystem of
>                                       204800 blocks (it's only 51200 blocks)

This is a bug in e2fsadm which will be fixed with LVM 0.8.
As a workaround you can perform the steps manually.

To extend the file system:

  e2fsck     - required by resize2fs
  lvextend   - resize the lvol
  resize2fs  - resize the fs

To reduce the file system:

  e2fsck     - required by resize2fs
  resize2fs  - resize the fs
  lvreduce   - resize the lvol


Hope this helps
Michael


--
Michael Marxmeier           Marxmeier Software AG
E-Mail: mike@msede.com      Besenbruchstrasse 9
Phone : +49 202 2431440     42285 Wuppertal, Germany
Fax   : +49 202 2431420     http://www.msede.com/