linux disk transfer space method
- 2020-06-19 12:30:29
- OfStack
How do you transfer space from one disk to another disk, because this happens a lot, in the /home directory the disk is large but /root is small, how do you transfer space from /home to /root? Here's how to fight.
fedora24 under actual combat
Use the following command to view disk usage
df -lh
The file system capacity Has been used available Has been used % The mount point
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 2.9M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/fedora-root 60G 46G 12G 81% /
tmpfs 3.9G 400K 3.9G 1% /tmp
/dev/sda1 477M 141M 307M 32% /boot
tmpfs 787M 0 787M 0% /run/user/0
/dev/mapper/fedora-home 141G 60M 134G 1% /home
The mount directory corresponding to /dev/mapper/ fedora-ES18en is /home
The mount directory corresponding to /dev/mapper/ fedora-ES26en is /
As can be seen from the above list, ES29en-ES30en is very large, but ES31en-ES32en is very small. We practice transferring 1G.
Unmount the /home directory
umount -v /home
Check the disk to be transferred
e2fsck -ff /dev/mapper/fedora-home
# This command operates on the result of 5 All steps must be passed
The results are shown as follows
e2fsck 1.42.13 (17-May-2015)
The first 1 step : check inode, block , The size and
The first 2 step : Check the directory structure
The first 3 step : Check directory connectivity
Pass 4: Checking reference counts
The first 5 step : Check the cluster profile information
/dev/mapper/fedora-home: 130190/10838016 files (0.1% non-contiguous), 8077341/43338752 blocks
Change the disk size of /dev/mapper/ ES49en-ES50en
Calculation method: 141G - transfer 1g = 140G
resize2fs /dev/mapper/fedora-home 140G
Cut disk space
lvreduce -L -1G /dev/mapper/fedora-home
Remount /home
mount -v /home
Move to/root
lvextend -L+1G /dev/mapper/fedora-root
Effect the /root space
resize2fs /dev/mapper/fedora-root
At this point, execute the ES74en-ES75en command
The file system capacity Has been used available Has been used % The mount point
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 2.9M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/fedora-root 60G 46G 12G 81% /
tmpfs 3.9G 400K 3.9G 1% /tmp
/dev/sda1 477M 141M 307M 32% /boot
tmpfs 787M 0 787M 0% /run/user/0
/dev/mapper/fedora-home 141G 60M 134G 1% /home
0