磁盘扩展
重启服务器
必须得重启,不然不生效。
重启之后看看里面的数据是否完好无损
[root@izj5ebh78jj2s7z128jseqz ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 1.5G 36G 4% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 308K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/vdb1 20G 45M 19G 1% /home tmpfs 783M 0 783M 0% /run/user/0 [root@izj5ebh78jj2s7z128jseqz ~]# cd /home/ [root@izj5ebh78jj2s7z128jseqz home]# ll total 20 -rw-r--r-- 1 root root 5 Jan 28 18:39 1.txt drwx------ 2 root root 16384 Jan 28 18:38 lost+found [root@izj5ebh78jj2s7z128jseqz home]# cat 1.txt sdsd
扩展
[root@iZj5eczs1dw6sj01j7hbfeZ ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 2.2G 36G 6% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 336K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/vdb1 20G 45M 19G 1% /home tmpfs 783M 0 783M 0% /run/user/0
查看磁盘容量
[root@iZj5e9lfz8aw5hjsy7r68qZ ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 1.5G 36G 4% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 304K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/vdb1 20G 45M 19G 1% /home tmpfs 783M 0 783M 0% /run/user/0 [root@iZj5e9lfz8aw5hjsy7r68qZ ~]# fdisk -l Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 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 Disk label type: dos Disk identifier: 0x0008de3e Device Boot Start End Blocks Id System /dev/vda1 * 2048 83884031 41940992 83 Linux Disk /dev/vdc: 32.2 GB, 32212254720 bytes, 62914560 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 Disk label type: dos Disk identifier: 0xc117ec4b Device Boot Start End Blocks Id System /dev/vdc1 2048 41943039 20970496 83 Linux
得停止使用磁盘得应用
[root@iZj5eczs1dw6sj01j7hbfeZ ~]# umount /dev/vdb1 [root@iZj5eczs1dw6sj01j7hbfeZ ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 2.2G 36G 6% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 336K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup tmpfs 783M 0 783M 0% /run/user/0
开始扩容
[root@iZj5eelw0yngbi1wc1yca5Z ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): d Selected partition 1 Partition 1 is deleted Command (m for help): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): Using default response p Partition number (1-4, default 1): First sector (2048-62914559, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-62914559, default 62914559): Using default value 62914559 Partition 1 of type Linux and of size 30 GiB is set Command (m for help): wq The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. [root@iZj5eelw0yngbi1wc1yca5Z ~]# e2fsck -f /dev/vdb1 e2fsck 1.42.9 (28-Dec-2013) /dev/vdb1 is mounted. e2fsck: Cannot continue, aborting. [root@iZj5eelw0yngbi1wc1yca5Z ~]# resize2fs /dev/vdb1 resize2fs 1.42.9 (28-Dec-2013) Filesystem at /dev/vdb1 is mounted on /home; on-line resizing required old_desc_blocks = 3, new_desc_blocks = 4 The filesystem on /dev/vdb1 is now 7864064 blocks long.
验证
[root@iZj5eelw0yngbi1wc1yca5Z ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 1.6G 36G 5% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 308K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup tmpfs 783M 0 783M 0% /run/user/0 /dev/vdb1 30G 44M 28G 1% /home [root@iZj5eelw0yngbi1wc1yca5Z ~]# cd /home/ [root@iZj5eelw0yngbi1wc1yca5Z home]# ll total 20 -rw-r--r-- 1 root root 7 Jan 28 18:17 1.txt drwx------ 2 root root 16384 Jan 28 18:17 lost+found [root@iZj5eelw0yngbi1wc1yca5Z home]# cat 1.txt sddsds
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