Fedora Users — lvm: different sizes being reported

Hi,

I have a little problem with a logical volume: in short, the size of the volume is different depending on if I boot from the FC5 rescue CD or from the installed FC5.

I have two mirrored disks. On the mirror I have created a logical volume /dev/VolGroup00/LogVol00 which contains the root filesystem. Initially I made the volume 4GB. Later I needed more space, so I decided to extend the volume to 8GB. I booted from the FC5 rescue CD and ran the following commands:

dmraid -a y
lvm vgscan
lvm vgchange -a y
lvm lvextend -L +4G /dev/VolGroup00/LogVol00
fsck /dev/VolGroup00/LogVol00
resize2fs /dev/VolGroup00/LogVol00

So far so good. Then I rebooted the system from disk and got the following error:

Checking filesystems
/dev/VolGroup00/LogVol00: The filesystem size (according to the superblock) is 2097152 blocks
The physical size of the device is 1048576 blocks
Either the superblock or the partition table is likely to be corrupt!

/dev/VolGroup/LogVol00: UNEXPECTED INCONSISTENCY, run fsck manually.

I entered the system administration mode and checked the size of /dev/VolGroup/LogVol00 with "lvm lvs": 4.00G
Strange... so I booted with the rescue CD again and checked the size once more from the rescue environment: 8.00G.

So it seems that when I boot the system normally it doesn't "see" that the size of the logical volume has changed. Can someone explain this, and hopefully help me fix the problem?

/Magnus