树莓派 apt-get install lvm2

root@test-VirtualBox:/# fdisk -l

Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders, total 16777216 sectors
Units = 扇区 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000670f1
   设备 启动      起点          终点     块数   Id  系统
/dev/sda1   *        2048    15728639     7863296   83  Linux
/dev/sda2        15730686    16775167      522241    5  扩展
/dev/sda5        15730688    16775167      522240   82  Linux 交换 / Solaris
Disk /dev/sdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders, total 4194304 sectors
Units = 扇区 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x45c39e6a

root@test-VirtualBox:/# fdisk /dev/sdb
命令(输入 m 获取帮助)： m
命令操作
   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)
命令(输入 m 获取帮助)： n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
分区号 (1-4，默认为 1)： 1
起始 sector (2048-4194303，默认为 2048)：
将使用默认值 2048
Last sector, +扇区 or +size{K,M,G} (2048-4194303，默认为 4194303)： 1000000
命令(输入 m 获取帮助)： w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
root@test-VirtualBox:/#

root@test-VirtualBox:/# fdisk /dev/sdb
命令(输入 m 获取帮助)： n
Partition type:
   p   primary (1 primary, 0 extended, 3 free)
   e   extended
Select (default p): p
分区号 (1-4，默认为 2)： 2
起始 sector (1000001-4194303，默认为 1000001)：
将使用默认值 1000001
Last sector, +扇区 or +size{K,M,G} (1000001-4194303，默认为 4194303)：
将使用默认值 4194303
命令(输入 m 获取帮助)： w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
root@test-VirtualBox:/#
root@test-VirtualBox:/# fdisk -l /dev/sdb

Disk /dev/sdb: 2147 MB, 2147483648 bytes
64 heads, 2 sectors/track, 32768 cylinders, total 4194304 sectors
Units = 扇区 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x45c39e6a
   设备 启动      起点          终点     块数   Id  系统
/dev/sdb1            2048     1000000      498976+  83  Linux
/dev/sdb2         1000001     4194303     1597151+  83  Linux
root@test-VirtualBox:/#

root@test-VirtualBox:/# fdisk /dev/sdb
命令(输入 m 获取帮助)： t
分区号 (1-4): 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
命令(输入 m 获取帮助)： w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
root@test-VirtualBox:/# fdisk /dev/sdb
命令(输入 m 获取帮助)： t
分区号 (1-4): 2
Hex code (type L to list codes): 8e
Changed system type of partition 2 to 8e (Linux LVM)
命令(输入 m 获取帮助)： w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
root@test-VirtualBox:/# fdisk -l /dev/sdb
Disk /dev/sdb: 2147 MB, 2147483648 bytes
64 heads, 2 sectors/track, 32768 cylinders, total 4194304 sectors
Units = 扇区 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x45c39e6a
   设备 启动      起点          终点     块数   Id  系统
/dev/sdb1            2048     1000000      498976+  8e  Linux LVM
/dev/sdb2         1000001     4194303     1597151+  8e  Linux LVM
root@test-VirtualBox:/#

root@test-VirtualBox:/# pvcreate /dev/sdb1
  Physical volume "/dev/sdb1" successfully created
root@test-VirtualBox:/# pvcreate /dev/sdb2
  Physical volume "/dev/sdb2" successfully created
root@test-VirtualBox:/#

root@test-VirtualBox:/# pvdisplay

  "/dev/sdb1" is a new physical volume of "487.28 MiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb1
  VG Name
  PV Size               487.28 MiB
  Allocatable           NO
  PE Size               0
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               TGttb4-y79K-zoUW-iQfc-q8SD-48Jy-S3u726
  "/dev/sdb2" is a new physical volume of "1.52 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb2
  VG Name
  PV Size               1.52 GiB
  Allocatable           NO
  PE Size               0
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               oD94Uc-4KMe-uHmy-7CWZ-ROvC-T4Ft-sX352k
root@test-VirtualBox:/#

root@test-VirtualBox:/# vgcreate lvmdisk /dev/sdb1 /dev/sdb2
  Volume group "lvmdisk" successfully created
root@test-VirtualBox:/# vgdisplay
  --- Volume group ---
  VG Name               lvmdisk
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  1
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                0
  Open LV               0
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               1.99 GiB
  PE Size               4.00 MiB
  Total PE              510
  Alloc PE / Size       0 / 0
  Free  PE / Size       510 / 1.99 GiB
  VG UUID               kRqFDk-3X9R-6Ju9-QHhK-S7oq-3UsF-9yeGd2
root@test-VirtualBox:/#

root@test-VirtualBox:/# lvcreate -L 1G -n pldy1 lvmdisk
  Logical volume "pldy1" created
root@test-VirtualBox:/# lvdisplay
  --- Logical volume ---
  LV Name                /dev/lvmdisk/pldy1
  VG Name                lvmdisk
  LV UUID                RlYmJ3-mDFc-Nz8r-uzCr-i2s6-QrqT-mNmAdm
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                1.00 GiB
  Current LE             256
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:0
root@test-VirtualBox:/#

root@test-VirtualBox:/# vgdisplay
  --- Volume group ---
  VG Name               lvmdisk
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               1.99 GiB
  PE Size               4.00 MiB
  Total PE              510
  Alloc PE / Size       256 / 1.00 GiB
  Free  PE / Size       254 / 1016.00 MiB
  VG UUID               kRqFDk-3X9R-6Ju9-QHhK-S7oq-3UsF-9yeGd2
root@test-VirtualBox:/#
root@test-VirtualBox:/# lvextend -L+100M /dev/lvmdisk/pldy1
  Extending logical volume pldy1 to 1.10 GiB
  Logical volume pldy1 successfully resized
root@test-VirtualBox:/# vgdisplay
  --- Volume group ---
  VG Name               lvmdisk
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               1.99 GiB
  PE Size               4.00 MiB
  Total PE              510
  Alloc PE / Size       281 / 1.10 GiB
  Free  PE / Size       229 / 916.00 MiB
  VG UUID               kRqFDk-3X9R-6Ju9-QHhK-S7oq-3UsF-9yeGd2
root@test-VirtualBox:/# mkfs.ext3 /dev/lvmdisk/pldy1
mke2fs 1.42 (29-Nov-2011)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
72000 inodes, 287744 blocks
14387 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=297795584
9 block groups
32768 blocks per group, 32768 fragments per group
8000 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376
Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (8192 blocks): 完成
Writing superblocks and filesystem accounting information: 完成
root@test-VirtualBox:/# mkdir /opt/oracle
root@test-VirtualBox:/# mount /dev/lvmdisk/pldy1 /opt/oracle/
root@test-VirtualBox:/# df -lhT
文件系统                  类型      容量  已用  可用 已用% 挂载点
/dev/sda1                 ext4      7.5G  2.8G  4.4G   39% /
udev                      devtmpfs  241M  4.0K  241M    1% /dev
tmpfs                     tmpfs     100M  784K   99M    1% /run
none                      tmpfs     5.0M     0  5.0M    0% /run/lock
none                      tmpfs     248M  124K  248M    1% /run/shm
/dev/sr0                  iso9660    56M   56M     0  100% /media/VBOXADDITIONS_4.3.20_96996
/dev/mapper/lvmdisk-pldy1 ext3      1.1G   34M 1017M    4% /opt/oracle
root@test-VirtualBox:/#

root@test-VirtualBox:/# lvextend -L+100M /dev/lvmdisk/pldy1
  Extending logical volume pldy1 to 1.20 GiB
  Logical volume pldy1 successfully resized
root@test-VirtualBox:/# df -hlT
文件系统                  类型      容量  已用  可用 已用% 挂载点
/dev/sda1                 ext4      7.5G  2.8G  4.4G   39% /
udev                      devtmpfs  241M  4.0K  241M    1% /dev
tmpfs                     tmpfs     100M  784K   99M    1% /run
none                      tmpfs     5.0M     0  5.0M    0% /run/lock
none                      tmpfs     248M  124K  248M    1% /run/shm
/dev/sr0                  iso9660    56M   56M     0  100% /media/VBOXADDITIONS_4.3.20_96996
/dev/mapper/lvmdisk-pldy1 ext3      1.1G   34M 1017M    4% /opt/oracle
root@test-VirtualBox:/# resize2fs /opt/oracle/
resize2fs 1.42 (29-Nov-2011)
open: 是一个目录 打开/opt/oracle/时
root@test-VirtualBox:/# resize2fs /dev/lvmdisk/pldy1
resize2fs 1.42 (29-Nov-2011)
Filesystem at /dev/lvmdisk/pldy1 is mounted on /opt/oracle; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/lvmdisk/pldy1 to 313344 (4k) blocks.
The filesystem on /dev/lvmdisk/pldy1 is now 313344 blocks long.
root@test-VirtualBox:/# df -hlT
文件系统                  类型      容量  已用  可用 已用% 挂载点
/dev/sda1                 ext4      7.5G  2.8G  4.4G   39% /
udev                      devtmpfs  241M  4.0K  241M    1% /dev
tmpfs                     tmpfs     100M  784K   99M    1% /run
none                      tmpfs     5.0M     0  5.0M    0% /run/lock
none                      tmpfs     248M  124K  248M    1% /run/shm
/dev/sr0                  iso9660    56M   56M     0  100% /media/VBOXADDITIONS_4.3.20_96996
/dev/mapper/lvmdisk-pldy1 ext3      1.2G   34M  1.1G    3% /opt/oracle
root@test-VirtualBox:/# resize2fs /dev/lvmdisk/pldy1
resize2fs 1.42 (29-Nov-2011)
Filesystem at /dev/lvmdisk/pldy1 is mounted on /opt/oracle; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/lvmdisk/pldy1 to 338944 (4k) blocks.
The filesystem on /dev/lvmdisk/pldy1 is now 338944 blocks long.
root@test-VirtualBox:/# df -lhT
文件系统                  类型      容量  已用  可用 已用% 挂载点
/dev/sda1                 ext4      7.5G  2.8G  4.4G   39% /
udev                      devtmpfs  241M  4.0K  241M    1% /dev
tmpfs                     tmpfs     100M  784K   99M    1% /run
none                      tmpfs     5.0M     0  5.0M    0% /run/lock
none                      tmpfs     248M  124K  248M    1% /run/shm
/dev/sr0                  iso9660    56M   56M     0  100% /media/VBOXADDITIONS_4.3.20_96996
/dev/mapper/lvmdisk-pldy1 ext3      1.3G   34M  1.2G    3% /opt/oracle

root@test-VirtualBox:/#

root@test-VirtualBox:/#  pvcreate /dev/sdb3
root@test-VirtualBox:/#  pvdisplay
root@test-VirtualBox:/#  vgdisplay
root@test-VirtualBox:/#  vgextend lvmdisk /dev/sdb3
root@test-VirtualBox:/#  vgdisplay

umount /dev/test_vg/test_lv1 

umount /dev/test_vg/test_lv2 

#卸载文件系统 

lvremove /dev/test_vg/test_lv1 

lvremove /dev/test_vg/test_lv2 

#移除逻辑卷 

vgremove test_vg 

#删除卷组 

pvremove /dev/sdb{1,2,3,4,5} 

#删除物理卷

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