[root@localhost ~]# fdisk /dev/sda 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 forhelp): m Command action a toggle a bootable flag b edit bsd disklabel c toggle the dos compatibility flag d delete a partition g create a new empty GPT partition table G create an IRIX (SGI) partition table l list known partition types m print this menu n add a new partition o create a new empty DOS partition table p print the partition table q quit without saving changes s create a new empty Sun disklabel t change a partition's system id u change display/entry units v verify the partition table w write table to disk and exit x extra functionality (experts only) Command (m for help): n Partition type: p primary (2 primary, 0 extended, 2 free) e extended Select (default p): p Partition number (3,4, default 3): 3 First sector (41943040-61439999, default 41943040): Using default value 41943040 Last sector, +sectors or +size{K,M,G} (41943040-61439999, default 61439999): Using default value 61439999 Partition 3 of type Linux and of size 9.3 GiB is set Command (m for help): t Partition number (1-3, default 3): 3 Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM' Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: 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) Syncing disks.
再查看磁盘
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[root@localhost ~]# fdisk -l /dev/sda
Disk /dev/sda: 31.5 GB, 31457280000 bytes, 61440000 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: 0x0009162b
Device Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux /dev/sda2 1026048 41943039 20458496 8e Linux LVM /dev/sda3 41943040 61439999 9748480 8e Linux LVM
# 重新分区 [root@localhost ~]# partprobe [root@localhost ~]# mkfs.ext3 /dev/sda3 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 609600 inodes, 2437120 blocks 121856 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2495610880 75 block groups 32768 blocks per group, 32768 fragments per group 8128 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done
[root@localhost ~]# lvm lvm> pvcreate /dev/sda3 WARNING: ext3 signature detected on /dev/sda3 at offset 1080. Wipe it? [y/n]: y Wiping ext3 signature on /dev/sda3. Physical volume "/dev/sda3" successfully created. lvm> vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size <19.51 GiB PE Size 4.00 MiB Total PE 4994 Alloc PE / Size 4984 / <19.47 GiB Free PE / Size 10 / 40.00 MiB VG UUID dGZuCt-X5L5-WTQD-BSRs-OO3m-GzGy-mIy0y3
lvm> vgextend centos /dev/sda3 Volume group "centos" successfully extended lvm> lvextend -l +4984 /dev/mapper/centos-root Insufficient free space: 4984 extents needed, but only 2389 available lvm> lvextend -l +2389 /dev/mapper/centos-root Size of logical volume centos/root changed from <17.47 GiB (4472 extents) to 26.80 GiB (6861 extents). Logical volume centos/root successfully resized. lvm> quit Exiting.
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