Raspberry PI 2 にインストールしたUbuntu MateにSDカードのすべての容量を認識させる
1.インストール
https://www.raspberrypi.org/downloads/
から、Ubuntu Mate をダウンロード、解凍(7zipが便利)して、image ファイルを、micro SD カードに焼く(Win32 Disk Imagerが便利)。Rasbperry Pi にさして起動。
2.SDカードの全容量を認識させる
https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=110785
32GB のSDカードを利用したのだが、7.2GB しか割り当てられていない。
root@pi:/home/piroto# df -h Filesystem Size Used Avail Use% Mounted on /dev/root 7.2G 3.9G 3.4G 54% / devtmpfs 459M 0 459M 0% /dev tmpfs 463M 404K 463M 1% /dev/shm tmpfs 463M 13M 451M 3% /run tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 463M 0 463M 0% /sys/fs/cgroup /dev/mmcblk0p1 64M 20M 45M 32% /boot tmpfs 93M 44K 93M 1% /run/user/1000
http://raspberrypi.stackexchange.com/questions/37739/ubuntu-mate-not-using-all-its-storage
ルート(sudo su)もしくは sudo でFDISK を起動 (fdisk /dev/mmcblk0)
root@pi:/dev# ls -l | grep "mmc*" brw-rw---- 1 root disk 179, 0 4月 21 2016 mmcblk0 brw-rw---- 1 root disk 179, 1 4月 21 2016 mmcblk0p1 brw-rw---- 1 root disk 179, 2 4月 21 2016 mmcblk0p2 root@pi:/dev# fdisk /dev/mmcblk0 Welcome to fdisk (util-linux 2.27.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): m Help: DOS (MBR) a toggle a bootable flag b edit nested BSD disklabel c toggle the dos compatibility flag Generic d delete a partition F list free unpartitioned space l list known partition types n add a new partition p print the partition table t change a partition type v verify the partition table i print information about a partition Misc m print this menu u change display/entry units x extra functionality (experts only) Script I load disk layout from sfdisk script file O dump disk layout to sfdisk script file Save & Exit w write table to disk and exit q quit without saving changes Create a new label g create a new empty GPT partition table G create a new empty SGI (IRIX) partition table o create a new empty DOS partition table s create a new empty Sun partition table
内容の確認(p)
Command (m for help): p Disk /dev/mmcblk0: 29 GiB, 31117541376 bytes, 60776448 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: 0x580a66ff Device Boot Start End Sectors Size Id Type /dev/mmcblk0p1 * 2048 133119 131072 64M c W95 FAT32 (LBA) /dev/mmcblk0p2 133120 15728639 15595520 7.4G 83 Linux
削除から再作成(d – 2 – n – p – 2 – enter – enter – w) し、reboot
Command (m for help): d
Partition number (1,2, default 2): 2
Partition 2 has been deleted.
Command (m for help): 2
2: unknown command
Command (m for help): n
Partition type
p primary (1 primary, 0 extended, 3 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (2-4, default 2): 2
First sector (133120-60776447, default 133120):
Last sector, +sectors or +size{K,M,G,T,P} (133120-60776447, default 60776447):
Created a new partition 2 of type 'Linux' and of size 28.9 GiB.
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 あと、パーティションを拡張
root@pi:/home/piroto# resize2fs /dev/mmcblk0p2 resize2fs 1.42.13 (17-May-2015) Filesystem at /dev/mmcblk0p2 is mounted on /; on-line resizing required old_desc_blocks = 1, new_desc_blocks = 2 The filesystem on /dev/mmcblk0p2 is now 7580416 (4k) blocks long.
/ パーティションが、29GB と認識された。
root@pi:/home/piroto# df -h Filesystem Size Used Avail Use% Mounted on /dev/root 29G 3.9G 25G 14% / devtmpfs 459M 0 459M 0% /dev tmpfs 463M 200K 463M 1% /dev/shm tmpfs 463M 6.8M 457M 2% /run tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 463M 0 463M 0% /sys/fs/cgroup /dev/mmcblk0p1 64M 20M 45M 32% /boot tmpfs 93M 28K 93M 1% /run/user/1000
