torgeir/resize-home-folder-partition-on-ubuntu-snappy-core-on-the-raspberry-pi-2.md

## resize-home-folder-partition-on-ubuntu-snappy-core-on-the-raspberry-pi-2.md

      
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              resize-home-folder-partition-on-ubuntu-snappy-core-on-the-raspberry-pi-2.md
            
          
    Note where home is
(RaspberryPi2)root@localhost:~# df -h /home/
Filesystem      Size  Used Avail Use% Mounted on
/dev/mmcblk0p4   1.6G 1.3G   160M  89% /oem

(RaspberryPi2)root@localhost:~# df -h
Filesystem                   Size  Used Avail Use% Mounted on
udev                         451M     0  451M   0% /dev
tmpfs                         93M   13M   80M  14% /run
/dev/disk/by-label/system-a  976M  238M  672M  27% /
/dev/mmcblk0p4               1.6G  1.3G  160M  89% /oem
tmpfs                        463M  4.0K  463M   1% /etc/fstab
tmpfs                        463M  112K  463M   1% /dev/shm
tmpfs                        5.0M     0  5.0M   0% /run/lock
tmpfs                        463M     0  463M   0% /sys/fs/cgroup
tmpfs                        463M     0  463M   0% /mnt
tmpfs                        463M     0  463M   0% /tmp
tmpfs                        463M     0  463M   0% /var/lib/sudo
/dev/mmcblk0p1                63M   43M   21M  68% /boot/uboot
cgmfs                        100K     0  100K   0% /run/cgmanager/fs
/dev/mmcblk0p3               976M  238M  672M  27% /writable/cache/system
tmpfs                         93M     0   93M   0% /run/user/1000

Run fdisk, stripping away the p4
(RaspberryPi2)root@localhost:~# sudo fdisk -uc /dev/mmcblk0

Welcome to fdisk (util-linux 2.25.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

p for partition
Command (m for help): p
Disk /dev/mmcblk0: 29.7 GiB, 31914983424 bytes, 62333952 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000095e1

Device         Boot   Start     End Sectors  Size Id Type
/dev/mmcblk0p1 *       8192  139263  131072   64M  c W95 FAT32 (LBA)
/dev/mmcblk0p2       139264 2236415 2097152    1G 83 Linux
/dev/mmcblk0p3      2236416 4333567 2097152    1G 83 Linux
/dev/mmcblk0p4      4333568 7616511 3282944  1.6G 83 Linux

d for delete
Command (m for help): d

pick number 4
Partition number (1-4, default 4): 4

Partition 4 has been deleted.

create a new partition with n
Command (m for help): n
Partition type
   p   primary (3 primary, 0 extended, 1 free)
   e   extended (container for logical partitions)

its a primary p, then pick the Start sector from /dev/mmcblk0p4 from the result of running p above and use it as First sector value. Hit for the Last sector to pick its default value (the rest of the card)
Select (default e): p

Selected partition 4
First sector (2048-62333951, default 2048): 4333568
Last sector, +sectors or +size{K,M,G,T,P} (4333568-62333951, default 62333951):

Created a new partition 4 of type 'Linux' and of size 27.7 GiB.

w to write it back
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy

The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).

reboot
(RaspberryPi2)root@localhost:~# shutdown -r now

wait for it to come back up, still shows the same
RaspberryPi2)ubuntu@localhost:~$ df -h
Filesystem                   Size  Used Avail Use% Mounted on
udev                         451M     0  451M   0% /dev
tmpfs                         93M   13M   81M  14% /run
/dev/disk/by-label/system-a  976M  238M  672M  27% /
/dev/mmcblk0p4               1.6G  1.3G  160M  89% /oem
tmpfs                        463M  4.0K  463M   1% /etc/fstab
tmpfs                        463M     0  463M   0% /dev/shm
tmpfs                        5.0M     0  5.0M   0% /run/lock
tmpfs                        463M     0  463M   0% /sys/fs/cgroup
tmpfs                        463M     0  463M   0% /tmp
tmpfs                        463M     0  463M   0% /mnt
tmpfs                        463M     0  463M   0% /var/lib/sudo
/dev/mmcblk0p1                63M   43M   21M  68% /boot/uboot
cgmfs                        100K     0  100K   0% /run/cgmanager/fs
/dev/mmcblk0p3               976M  238M  672M  27% /writable/cache/system
tmpfs                         93M     0   93M   0% /run/user/1000

go root
(RaspberryPi2)ubuntu@localhost:~$ sudo su -

resize p4 to fit the disk
(RaspberryPi2)root@localhost:~# resize2fs -p /dev/mmcblk0p4
resize2fs 1.42.12 (29-Aug-2014)
Filesystem at /dev/mmcblk0p4 is mounted on /writable; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
The filesystem on /dev/mmcblk0p4 is now 7250048 (4k) blocks long.

bam, its 28GB
(RaspberryPi2)root@localhost:~# df -h
Filesystem                   Size  Used Avail Use% Mounted on
udev                         451M     0  451M   0% /dev
tmpfs                         93M   13M   81M  14% /run
/dev/disk/by-label/system-a  976M  238M  672M  27% /
/dev/mmcblk0p4                28G  1.3G   25G   5% /oem           <---
tmpfs                        463M  4.0K  463M   1% /etc/fstab
tmpfs                        463M     0  463M   0% /dev/shm
tmpfs                        5.0M     0  5.0M   0% /run/lock
tmpfs                        463M     0  463M   0% /sys/fs/cgroup
tmpfs                        463M     0  463M   0% /tmp
tmpfs                        463M     0  463M   0% /mnt
tmpfs                        463M     0  463M   0% /var/lib/sudo
/dev/mmcblk0p1                63M   43M   21M  68% /boot/uboot
cgmfs                        100K     0  100K   0% /run/cgmanager/fs
/dev/mmcblk0p3               976M  238M  672M  27% /writable/cache/system
tmpfs                         93M     0   93M   0% /run/user/1000