The partition has an ext3 filesystem on it, but was mounted in /etc/fstab as an ext4 partion! Changing fstype to ext3 in /etc/fstab solves this problem. Now I can resize it online without problems.
Please close this bug report. Thank you for your hints.
Problem solved!
The partition has an ext3 filesystem on it, but was mounted in /etc/fstab as an ext4 partion! Changing fstype to ext3 in /etc/fstab solves this problem. Now I can resize it online without problems.
Please close this bug report. Thank you for your hints.
Regards,
Ralf