CentOS扩展分区大小
扩展分区
[root@localhost ~]df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 26G 20G 5.5G 78% / tmpfs 5.9G 72K 5.9G 1% /dev/shm /dev/sda1 477M 68M 385M 15% /boot [root@localhost ~]fdisk -l Disk /dev/sda: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00037586 Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 3917 30944256 8e Linux LVM Disk /dev/mapper/VolGroup-lv_root: 28.5 GB, 28462546944 bytes 255 heads, 63 sectors/track, 3460 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 [root@localhost ~]lvdisplay --- Logical volume --- LV Path /dev/VolGroup/lv_root LV Name lv_root VG Name VolGroup LV UUID S8KICb-emT1-PtqH-Fhgc-szCl-7lRd-tq26hj LV Write Access read/write LV Creation host, time localhost.localdomain, 2016-01-25 13:04:50 +0800 LV Status available # open 1 LV Size 26.51 GiB Current LE 6786 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 --- Logical volume --- LV Path /dev/VolGroup/lv_swap LV Name lv_swap VG Name VolGroup LV UUID tagUGp-5vNM-bR70-caqo-r5rb-fE0M-ZfeqY6 LV Write Access read/write LV Creation host, time localhost.localdomain, 2016-01-25 13:04:54 +0800 LV Status available # open 1 LV Size 3.00 GiB Current LE 768 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 [root@localhost ~]fdisk /dev/sda WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): m Command action a toggle a bootable flag b edit bsd disklabel c toggle the dos compatibility flag d delete a partition 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 Command action e extended p primary partition (1-4) p Partition number (1-4): 4 First cylinder (3917-13054, default 3917): Using default value 3917 Last cylinder, +cylinders or +size{K,M,G} (3917-13054, default 13054): Using default value 13054 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. [root@localhost ~]reboot Broadcast message from root@localhost.localdomain (/dev/pts/0) at 8:27 ... The system is going down for reboot NOW! [root@localhost ~]# mkfs -t ext4 /dev/sda4 mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 4587520 inodes, 18349743 blocks 917487 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 560 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424 Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 39 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. [root@localhost ~]# pvcreate /dev/sda4 Physical volume "/dev/sda4" successfully created [root@localhost ~]# vgextend /dev/mapper/VolGroup /dev/sda4 Volume group "VolGroup" successfully extended [root@localhost ~]# vgdisplay --- Volume group --- VG Name VolGroup System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 2 Act PV 2 VG Size 99.50 GiB PE Size 4.00 MiB Total PE 25473 Alloc PE / Size 7554 / 29.51 GiB Free PE / Size 17919 / 70.00 GiB VG UUID xFBNk3-FQKV-KVLP-vnon-gA0Y-ouVV-MqBbkO [root@localhost ~]# lvextend -L +69.9G /dev/mapper/VolGroup-lv_root /dev/sda4 Rounding size to boundary between physical extents: 69.90 GiB Size of logical volume VolGroup/lv_root changed from 26.51 GiB (6786 extents) to 96.41 GiB (24681 extents). Logical volume lv_root successfully resized [root@localhost ~]# resize2fs /dev/mapper/VolGroup-lv_root resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/mapper/VolGroup-lv_root is mounted on /; on-line resizing required old desc_blocks = 2, new_desc_blocks = 7 Performing an on-line resize of /dev/mapper/VolGroup-lv_root to 25273344 (4k) blocks. The filesystem on /dev/mapper/VolGroup-lv_root is now 25273344 blocks long. [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 95G 20G 71G 22% / tmpfs 5.9G 72K 5.9G 1% /dev/shm /dev/sda1 477M 68M 385M 15% /boot
linux
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