A reminder of how to shrink the root partition of a fresh Arch Linux installation on a Raspberry Pi.
I wanted to make more room on a 4GB SD card for a Linux From Scratch build, so I resized the root partition down to 700mb and created a new 3GB logical partition next to it.
I didn't have another Linux machine available, so I used OSX Mavericks to write the original Arch image to the SD card and do the initial filesystem resize. Everything else was done on the Pi itself.
| # OSX | |
| ❯ diskutil list | |
| /dev/disk0 | |
| #: TYPE NAME SIZE IDENTIFIER | |
| 0: GUID_partition_scheme *251.0 GB disk0 | |
| 1: EFI EFI 209.7 MB disk0s1 | |
| 2: Apple_HFS Macintosh HD 250.1 GB disk0s2 | |
| 3: Apple_Boot Recovery HD 650.0 MB disk0s3 | |
| /dev/disk1 | |
| #: TYPE NAME SIZE IDENTIFIER | |
| 0: FDisk_partition_scheme *4.0 GB disk1 | |
| 1: Windows_FAT_32 NO NAME 94.4 MB disk1s1 | |
| 2: Linux 1.8 GB disk1s5 | |
| ~/personal/rpi-lfs/images master | |
| ❯ sudo -s | |
| Password: | |
| ~/personal/rpi-lfs/images master | |
| ❯ diskutil unmountDisk /dev/disk1 | |
| Unmount of all volumes on disk1 was successful | |
| ~/personal/rpi-lfs/images master | |
| ❯ dd if=ArchLinuxARM-2014.04-rpi.img of=/dev/rdisk1 bs=1m | |
| 1870+0 records in | |
| 1870+0 records out | |
| 1960837120 bytes transferred in 205.795374 secs (9528091 bytes/sec) | |
| ~/personal/rpi-lfs/images master | |
| ❯ sudo e2fsck -f /dev/disk1s5 | |
| e2fsck 1.42.9 (28-Dec-2013) | |
| 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/disk1s5: 28388/108864 files (1.1% non-contiguous), 122680/434944 blocks | |
| ~/personal/rpi-lfs/images master | |
| ❯ resize2fs /dev/disk1s5 700M | |
| resize2fs 1.42.9 (28-Dec-2013) | |
| Resizing the filesystem on /dev/disk1s5 to 179200 (4k) blocks. | |
| The filesystem on /dev/disk1s5 is now 179200 blocks long. | |
| ❯ diskutil unmountDisk /dev/disk1 | |
| Unmount of all volumes on disk1 was successful | |
| # No longer need root | |
| ~/personal/rpi-lfs/images master | |
| ❯ exit | |
| # Put the disk in the Pi! | |
| # Remove the pi's old key from ~/.ssh/known_hosts if necessary | |
| ~/personal/rpi-lfs/images master | |
| ❯ ssh root@pi | |
| The authenticity of host 'pi (192.168.1.17)' can't be established. | |
| RSA key fingerprint is 7a:4d:20:a6:66:89:88:42:07:ad:6b:79:2e:5c:e2:83. | |
| Are you sure you want to continue connecting (yes/no)? yes | |
| Warning: Permanently added 'pi,192.168.1.17' (RSA) to the list of known hosts. | |
| root@pi's password: | |
| Welcome to Arch Linux ARM | |
| Website: http://archlinuxarm.org | |
| Forum: http://archlinuxarm.org/forum | |
| IRC: #archlinux-arm on irc.Freenode.net | |
| [root@alarmpi ~]# df -h | |
| Filesystem Size Used Avail Use% Mounted on | |
| /dev/root 657M 428M 180M 71% / | |
| devtmpfs 84M 0 84M 0% /dev | |
| tmpfs 232M 0 232M 0% /dev/shm | |
| tmpfs 232M 300K 231M 1% /run | |
| tmpfs 232M 0 232M 0% /sys/fs/cgroup | |
| tmpfs 232M 0 232M 0% /tmp | |
| /dev/mmcblk0p1 90M 25M 66M 28% /boot | |
| tmpfs 47M 0 47M 0% /run/user/0 | |
| [root@alarmpi ~]# fdisk /dev/mmcblk0 | |
| Welcome to fdisk (util-linux 2.24.1). | |
| Changes will remain in memory only, until you decide to write them. | |
| Be careful before using the write command. | |
| Command (m for help): p | |
| Disk /dev/mmcblk0: 3.8 GiB, 4016046080 bytes, 7843840 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: 0x417ee54b | |
| Device Boot Start End Blocks Id System | |
| /dev/mmcblk0p1 2048 186367 92160 c W95 FAT32 (LBA) | |
| /dev/mmcblk0p2 186368 3667967 1740800 5 Extended | |
| /dev/mmcblk0p5 188416 3667967 1739776 83 Linux | |
| Command (m for help): d | |
| Partition number (1,2,5, default 5): 5 | |
| Partition 5 has been deleted. | |
| Command (m for help): d | |
| Partition number (1,2, default 2): | |
| Partition 2 has been deleted. | |
| Command (m for help): p | |
| Disk /dev/mmcblk0: 3.8 GiB, 4016046080 bytes, 7843840 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: 0x417ee54b | |
| Device Boot Start End Blocks Id System | |
| /dev/mmcblk0p1 2048 186367 92160 c W95 FAT32 (LBA) | |
| Command (m for help): n | |
| Partition type: | |
| p primary (1 primary, 0 extended, 3 free) | |
| e extended | |
| Select (default p): e | |
| Partition number (2-4, default 2): | |
| First sector (186368-7843839, default 186368): | |
| Last sector, +sectors or +size{K,M,G,T,P} (186368-7843839, default 7843839): | |
| Created a new partition 2 of type 'Extended' and of size 3.7 GiB. | |
| Command (m for help): n | |
| Partition type: | |
| p primary (1 primary, 1 extended, 2 free) | |
| l logical (numbered from 5) | |
| Select (default p): l | |
| Adding logical partition 5 | |
| First sector (188416-7843839, default 188416): | |
| Last sector, +sectors or +size{K,M,G,T,P} (188416-7843839, default 7843839): +700M | |
| Created a new partition 5 of type 'Linux' and of size 700 MiB. | |
| Command (m for help): n | |
| Partition type: | |
| p primary (1 primary, 1 extended, 2 free) | |
| l logical (numbered from 5) | |
| Select (default p): l | |
| Adding logical partition 6 | |
| First sector (1626112-7843839, default 1626112): | |
| Last sector, +sectors or +size{K,M,G,T,P} (1626112-7843839, default 7843839): | |
| Created a new partition 6 of type 'Linux' and of size 3 GiB. | |
| Command (m for help): p | |
| Disk /dev/mmcblk0: 3.8 GiB, 4016046080 bytes, 7843840 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: 0x417ee54b | |
| Device Boot Start End Blocks Id System | |
| /dev/mmcblk0p1 2048 186367 92160 c W95 FAT32 (LBA) | |
| /dev/mmcblk0p2 186368 7843839 3828736 5 Extended | |
| /dev/mmcblk0p5 188416 1624063 717824 83 Linux | |
| /dev/mmcblk0p6 1626112 7843839 3108864 83 Linux | |
| 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). | |
| [root@alarmpi ~]# reboot | |
| Connection to pi closed by remote host. | |
| Connection to pi closed. | |
| # Wait a minute or two for the pi to come back online | |
| ❯ ssh root@pi | |
| root@pi's password: | |
| Welcome to Arch Linux ARM | |
| Website: http://archlinuxarm.org | |
| Forum: http://archlinuxarm.org/forum | |
| IRC: #archlinux-arm on irc.Freenode.net | |
| Last login: Mon Apr 14 12:08:42 2014 from 192.168.1.11 | |
| [root@alarmpi ~]# df -h | |
| Filesystem Size Used Avail Use% Mounted on | |
| /dev/root 657M 428M 180M 71% / | |
| devtmpfs 84M 0 84M 0% /dev | |
| tmpfs 232M 0 232M 0% /dev/shm | |
| tmpfs 232M 304K 231M 1% /run | |
| tmpfs 232M 0 232M 0% /sys/fs/cgroup | |
| tmpfs 232M 0 232M 0% /tmp | |
| /dev/mmcblk0p1 90M 25M 66M 28% /boot | |
| tmpfs 47M 0 47M 0% /run/user/0 | |
| [root@alarmpi ~]# mkfs.ext4 /dev/mmcblk0p6 | |
| mke2fs 1.42.9 (28-Dec-2013) | |
| Filesystem label= | |
| OS type: Linux | |
| Block size=4096 (log=2) | |
| Fragment size=4096 (log=2) | |
| Stride=0 blocks, Stripe width=0 blocks | |
| 194688 inodes, 777472 blocks | |
| 38873 blocks (5.00%) reserved for the super user | |
| First data block=0 | |
| Maximum filesystem blocks=796917760 | |
| 24 block groups | |
| 32768 blocks per group, 32768 fragments per group | |
| 8112 inodes per group | |
| Superblock backups stored on blocks: | |
| 32768, 98304, 163840, 229376, 294912 | |
| Allocating group tables: done | |
| Writing inode tables: done | |
| Creating journal (16384 blocks): done | |
| Writing superblocks and filesystem accounting information: done | |
| [root@alarmpi ~]# mkdir -p /mnt/lfs | |
| [root@alarmpi ~]# mount /dev/mmcblk0p6 /mnt/lfs/ | |
| [root@alarmpi ~]# df -h | |
| Filesystem Size Used Avail Use% Mounted on | |
| /dev/root 657M 428M 180M 71% / | |
| devtmpfs 84M 0 84M 0% /dev | |
| tmpfs 232M 0 232M 0% /dev/shm | |
| tmpfs 232M 304K 231M 1% /run | |
| tmpfs 232M 0 232M 0% /sys/fs/cgroup | |
| tmpfs 232M 0 232M 0% /tmp | |
| /dev/mmcblk0p1 90M 25M 66M 28% /boot | |
| tmpfs 47M 0 47M 0% /run/user/0 | |
| /dev/mmcblk0p6 2.9G 4.5M 2.7G 1% /mnt/lfs |
How did you use e2fsck on a mac? I get command not found.