Solución 1:
El mismo problema:resultó que mi FS tenía algunas inconsistencias:
# resize2fs /dev/blah/lvol0
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/blah/lvol0 is mounted on /mnt/lvol0; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
resize2fs: Permission denied to resize filesystem
# umount /mnt/lvol0
# resize2fs /dev/blah/lvol0
resize2fs 1.42.9 (28-Dec-2013)
Please run 'e2fsck -f /dev/blah/lvol0' first.
# fsck /dev/blah/lvol0
fsck from util-linux 2.23.2
e2fsck 1.42.9 (28-Dec-2013)
/dev/mapper/blah-lvol0 contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/mapper/blah-lvol0: 513/3072 files (2.9% non-contiguous), 12288/12288 blocks
# mount /dev/blah/lvol0 /mnt/lvol0
# resize2fs /dev/blah/lvol0
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/blah/lvol0 is mounted on /mnt/lvol0; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
The filesystem on /dev/blah/lvol0 is now 225280 blocks long.
Solución 2:
/dev/mapper/ puede contener dispositivos de bloque en lugar de enlaces simbólicos. Si es así, elimínelos, ejecute udevadm trigger . Trabajó para Debian 7.8.