Ubuntu 18.04扩展磁盘容量到单独分区
vmvare下
扩展原有磁盘容量时，一般情况下需要删除分区重新划分，这样就删除了原有的数据，为了保留原有数据，把扩展的分区额外划分到一个分区，自动挂载到一个目录，减少风险。
原来只有50G容量，扩展成200G，增加的150G单独做成一个分区。
Linux下
logread@logread:~$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 49G 35G 12G 75% /
Disk /dev/sda: 200 GiB, 214748364800 bytes, 419430400 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: gpt
Disk identifier: 79FFB5A5-7F6B-47AD-A0C9-A017D9011EA0
Device Start End Sectors Size Type
/dev/sda1 2048 4095 2048 1M BIOS boot
/dev/sda2 4096 104855551 104851456 50G Linux filesystem
fdisk增加分区
logread@logread:~$ sudo fdisk /dev/sda
[sudo] password for logread:
Welcome to fdisk (util-linux 2.31.1).
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/sda: 200 GiB, 214748364800 bytes, 419430400 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: gpt
Disk identifier: 79FFB5A5-7F6B-47AD-A0C9-A017D9011EA0
Device Start End Sectors Size Type
/dev/sda1 2048 4095 2048 1M BIOS boot
/dev/sda2 4096 104855551 104851456 50G Linux filesystem
Command (m for help): n
Partition number (3-128, default 3): 3
First sector (104855552-419430366, default 104855552):
Last sector, +sectors or +size{K,M,G,T,P} (104855552-419430366, default 419430366):
Created a new partition 3 of type 'Linux filesystem' and of size 150 GiB.
Command (m for help): p
Disk /dev/sda: 200 GiB, 214748364800 bytes, 419430400 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: gpt
Disk identifier: 79FFB5A5-7F6B-47AD-A0C9-A017D9011EA0
Device Start End Sectors Size Type
/dev/sda1 2048 4095 2048 1M BIOS boot
/dev/sda2 4096 104855551 104851456 50G Linux filesystem
/dev/sda3 104855552 419430366 314574815 150G Linux filesystem
Command (m for help): w
GPT PMBR size mismatch (104857599 != 419430399) will be corrected by w(rite).
The partition table has been altered.
Syncing disks.
mkfs.ext4格式化
logread@logread:~$ sudo mkfs.ext4 /dev/sda3
mke2fs 1.44.1 (24-Mar-2018)
Creating filesystem with 39321600 4k blocks and 9849600 inodes
Filesystem UUID: cf0f2a70-b399-4486-a287-3cb6f6b1baac
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872
Allocating group tables: done
Writing inode tables: done
Creating journal (262144 blocks):
done
Writing superblocks and filesystem accounting information: done mount挂载
logread@logread:~$ sudo mount -t ext4 /dev/sda3 yubo.wang/
/dev/sda3 on /home/logread/yubo.wang type ext4 (rw,relatime,data=ordered)
logread@logread:~$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 147G 61M 140G 1% /home/logread/yubo.wang
自动挂载
/etc/fstab
UUID=cf0f2a70-b399-4486-a287-3cb6f6b1baac /home/logread/yubo.wang ext4 defaults 0 0