gerboland@localhost:/run/initramfs$ cat resize-writable.log 
e2fsck 1.42.13 (17-May-2015)
ext2fs_check_desc: Corrupt group descriptor: bad block for block bitmap
e2fsck: Group descriptors look bad... trying backup blocks...
Resize inode not valid.  Recreate? yes

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
Block bitmap differences:  +(98304--98370)
Fix? yes

Free blocks count wrong for group #0 (4294967295, counted=0).
Fix? yes

Free blocks count wrong (39961, counted=39962).
Fix? yes


writable: ***** FILE SYSTEM WAS MODIFIED *****
writable: 38/33840 files (5.3% non-contiguous), 95167/135129 blocks
gerboland@localhost:/run/initramfs$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            330M     0  330M   0% /dev
tmpfs            92M  6.8M   86M   8% /run
/dev/mmcblk0p2  504M  350M  117M  75% /writable
/dev/loop0       71M   71M     0 100% /
/dev/loop1      100M  100M     0 100% /lib/modules
tmpfs           460M  4.0K  460M   1% /etc/fstab
tmpfs           460M     0  460M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           460M     0  460M   0% /sys/fs/cgroup
tmpfs           460M     0  460M   0% /media
tmpfs           460M     0  460M   0% /tmp
tmpfs           460M     0  460M   0% /mnt
tmpfs           460M     0  460M   0% /var/lib/sudo
/dev/mmcblk0p1  127M   22M  105M  17% /boot/uboot
cgmfs           100K     0  100K   0% /run/cgmanager/fs
/dev/loop2       71M   71M     0 100% /snap/core/2812
/dev/loop3      100M  100M     0 100% /snap/pi2-kernel/41
/dev/loop4      6.0M  6.0M     0 100% /snap/pi3/22
tmpfs            92M     0   92M   0% /run/user/1000
gerboland@localhost:/run/initramfs$