CentOS 7 刪除LV VG卷組邏輯卷物理卷
阿新 • • 發佈:2018-12-15
ins mov defaults scan 選擇 done 沒有 lock mkfs 很多用戶在XenSystem的默認模版CentOS7默認掛載到/home,無法掛載/www
按如下操作
查看卷組相關信息
[root@MyCloudServer ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "Xvdbgroup" using metadata type lvm2
Found volume group "centos" using metadata type lvm2
查看卷組VolGroup00包含的PV、LV信息。
[root@MyCloudServer ~]# vgdisplay -v Xvdbgroup Using volume group(s) on command line. --- Volume group --- VG Name Xvdbgroup System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size 30.00 GiB PE Size 4.00 MiB Total PE 7679 Alloc PE / Size 7655 / 29.90 GiB Free PE / Size 24 / 96.00 MiB VG UUID PBc5Xq-pQ61-L618-h8Nd-31oE-RmuB-qlaEyv --- Logical volume --- LV Path /dev/Xvdbgroup/xvdb1 LV Name xvdb1 VG Name Xvdbgroup LV UUID vgJbGW-UZAe-zM8y-HRcE-c5f6-PKpk-mh3lPU LV Write Access read/write LV Creation host, time MyCloudServer, 2018-12-09 20:12:17 +0800 LV Status available # open 1 LV Size 29.90 GiB Current LE 7655 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:2 --- Physical volumes --- PV Name /dev/xvdb1 PV UUID ht2z0o-yINv-08WR-crWy-oeff-PXh6-IOGbMK PV Status allocatable Total PE / Free PE 7679 / 24
卸載卷組上的邏輯卷LV
要卸載對應卷組VG的所有邏輯卷LV。從上面的信息可以看出對應的卷組VolGroup00只有/dev/VolGroup00/iscsi00這個邏輯卷LV
[root@MyCloudServer ~]# umount /dev/Xvdbgroup/xvdb1
刪除邏輯卷LV
[root@MyCloudServer ~]# lvremove /dev/Xvdbgroup/xvdb1
Do you really want to remove active logical volume xvdb1? [y/n]: y
Logical volume "xvdb1" successfully removed
刪除卷組VG
[root@MyCloudServer ~]# vgremove Xvdbgroup
Volume group "Xvdbgroup" successfully removed
驗證卷組(VG)是否刪除 剩下centos 卷組是對的
[root@MyCloudServer ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "centos" using metadata type lvm2
刪除物理卷PV
[root@MyCloudServer ~]# pvremove /dev/xvdb1 Labels on physical volume "/dev/xvdb1" successfully wiped
編輯 /etc/fstab 刪除對應掛載點信息
這裏沒有安裝nano yum install nano 筆者喜歡用nano
[root@MyCloudServer ~]# nano /etc/fstab
-bash: nano: command not found
[root@MyCloudServer ~]# yum install nano
看到/etc/fstab裏面沒有什麽需要刪的,Ctrl+C退出nano不用保存,
下面是格式化/dev/xvdb為ext4的格式
[root@MyCloudServer ~]# mkfs.ext4 /dev/xvdb
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
1966080 inodes, 7864320 blocks
393216 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2155872256
240 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
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
接下來就可以用一健腳本完成掛載
yum install wget -y && wget -O auto_disk.sh http://download.bt.cn/tools/auto_disk.sh && bash auto_disk.sh
可以查看df 和nano /etc/fstab 有沒有成功,成功了就可以reboot了
下次重裝時只選擇格式化系統盤,再次掛載數據不會丟失
mkdir /www
mount /dev/xvdb1 /www
echo "/dev/xvdb1 /www ext4 defaults 1 3" >> /etc/fstab
以上命令可以重新掛載/www分區,如果你是小白,數據很重要,建議備份了再試。
CentOS 7 刪除LV VG卷組邏輯卷物理卷