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转载请注明：http://www.cnblogs.com/juandx/p/5618162.html
这篇文章介绍怎么添加一块新的硬盘，然后将其添加到一个新的分区或者一个已有的分区，比如增加根分区的大小
比如在virtualbox中添加的硬盘也可以用这样的
添加新分区 fdisk -l 可以看到新的硬盘 /dev/sdb fdisk /dev/sdb 输入m查看提示 输入n添加分区 输入1新建一个分区 然后默认回车2次创建成功(有人说第二次按w保存，但是我直接回车好像也没问题额) 格式化分区 mkfs -t xfs /dev/sdb 新建一个自己想要挂载的目录 mkdir /opt/data/data1 然后 mount -t xfs /dev/sdb /opt/data/data1 df -lhT可以看到信息，ok了 添加新硬盘到新的分区(xfs/ext4) fdisk -l 可以看到新的硬盘 /dev/sdb fdisk /dev/sdb 输入m查看提示 输入n添加分区 输入1新建一个分区 然后默认回车2次创建成功(有人说第二次按w保存，但是我直接回车好像也没问题额) 格式化分区 mkfs -t xfs /dev/sdb 查看pv(物理卷) [root@wb201 /]# pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name centos PV Size 7.51 GiB / not usable 3.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 1922 Free PE 10 Allocated PE 1912 PV UUID 8AV96r-QBvP-Hy6Q-uP1l-YI4b-UYom-GgIUNV 创建pv [root@wb201 /]# pvcreate /dev/sdb WARNING: xfs signature detected on /dev/sdb at offset 0. Wipe it? [y/n]: y Wiping xfs signature on /dev/sdb. Physical volume "/dev/sdb" successfully created [root@wb201 /]# pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name centos PV Size 7.51 GiB / not usable 3.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 1922 Free PE 10 Allocated PE 1912 PV UUID 8AV96r-QBvP-Hy6Q-uP1l-YI4b-UYom-GgIUNV "/dev/sdb" is a new physical volume of "20.78 GiB" --- NEW Physical volume --- PV Name /dev/sdb VG Name PV Size 20.78 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID OjyuLL-5f4X-BoVB-hZBS-AJpZ-IeMV-JO6UHF 查看vg(卷组) [root@wb201 /]# 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 7.51 GiB PE Size 4.00 MiB Total PE 1922 Alloc PE / Size 1912 / 7.47 GiB Free PE / Size 10 / 40.00 MiB VG UUID iLRzhR-myQz-XQwG-XBnd-yH2V-2vhu-VWTtgm 增加卷组 [root@wb201 /]# vgextend centos /dev/sdb Volume group "centos" successfully extended 查看lv(卷组) [root@wb201 /]# lvdisplay --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID dBjVT5-KvtT-t4zS-hWkh-cDvn-rXch-hc7SaA LV Write Access read/write LV Creation host, time localhost, 2016-02-22 22:43:17 +0800 LV Status available # open 2 LV Size 820.00 MiB Current LE 205 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1 --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID 6IJGJT-QEyI-bsQ2-O180-hRcI-T5U8-QBUcMA LV Write Access read/write LV Creation host, time localhost, 2016-02-22 22:43:17 +0800 LV Status available # open 1 LV Size 6.67 GiB Current LE 1707 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 看看现在卷组的情况 [root@wb201 /]# vgdisplay --- Volume group --- VG Name centos 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 28.28 GiB PE Size 4.00 MiB Total PE 7240 Alloc PE / Size 1912 / 7.47 GiB Free PE / Size 5328 / 20.81 GiB VG UUID iLRzhR-myQz-XQwG-XBnd-yH2V-2vhu-VWTtgm 看看现在逻辑卷的情况 [root@wb201 /]# lvdisplay --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID dBjVT5-KvtT-t4zS-hWkh-cDvn-rXch-hc7SaA LV Write Access read/write LV Creation host, time localhost, 2016-02-22 22:43:17 +0800 LV Status available # open 2 LV Size 820.00 MiB Current LE 205 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1 --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID 6IJGJT-QEyI-bsQ2-O180-hRcI-T5U8-QBUcMA LV Write Access read/write LV Creation host, time localhost, 2016-02-22 22:43:17 +0800 LV Status available # open 1 LV Size 6.67 GiB Current LE 1707 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 增加物理卷到根目录，可以看到根目录是在/dev/centos/root [root@wb201 /]# lvextend -L +20.81G /dev/centos/root Rounding size to boundary between physical extents: 20.81 GiB Size of logical volume centos/root changed from 6.67 GiB (1707 extents) to 27.48 GiB (7035 extents). Logical volume root successfully resized. 现在还没有增加，因为还没有更新 [root@wb201 /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 6.7G 5.5G 1.3G 82% / devtmpfs 1.9G 0 1.9G 0% /dev tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs 1.9G 8.4M 1.9G 1% /run tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/sda1 497M 205M 292M 42% /boot tmpfs 380M 0 380M 0% /run/user/0 如果不xfs用resize2fs更新，但是xfs需要用xfs_growfs [root@wb201 /]# resize2fs /dev/centos/root resize2fs 1.42.9 (28-Dec-2013) resize2fs: Bad magic number in super-block while trying to open /dev/centos/root Couldn‘t find valid filesystem superblock. [root@wb201 /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 6.7G 5.5G 1.3G 82% / devtmpfs 1.9G 0 1.9G 0% /dev tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs 1.9G 8.4M 1.9G 1% /run tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/sda1 497M 205M 292M 42% /boot tmpfs 380M 0 380M 0% /run/user/0 [root@wb201 /]# xfs_growfs /dev/centos/root meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=436992 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 data = bsize=4096 blocks=1747968, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 log =internal bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 1747968 to 7203840 现在看就ok啦，哈哈 [root@wb201 /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 28G 5.5G 23G 20% / devtmpfs 1.9G 0 1.9G 0% /dev tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs 1.9G 8.4M 1.9G 1% /run tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/sda1 497M 205M 292M 42% /boot tmpfs 380M 0 380M 0% /run/user/0
ok了，完美~
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原文地址：http://www.cnblogs.com/juandx/p/5618162.html
