linux软raid和lvm
作者 佚名技术
来源 Linux系统
浏览
发布时间 2012-04-04
| ailed: Read-only file system
Attempt to close device ''/dev/cdrom'' which is not open.
PV /dev/hdd1 lvm2 [1.86 GB]
PV /dev/hdd2 lvm2 [1.86 GB]
PV /dev/hdd3 lvm2 [1.86 GB]
Total: 4 [35.46 GB] / in use: 1 [29.88 GB] / in no VG: 3 [5.59 GB]
建立卷组：
[root@qiuri ~]# vgcreate vg0 /dev/hdd1 /dev/hdd2 /dev/hdd3
Volume group "vg0" successfully created
[root@qiuri ~]#
[root@qiuri ~]# vgscan
Reading all physical volumes. This may take a while...
/dev/cdrom: open failed: Read-only file system
Attempt to close device ''/dev/cdrom'' which is not open.
Found volume group "vg0" using metadata type lvm2
建立逻辑卷：
[root@qiuri ~]# lvcreate -n lv0 -L 1000M vg0
Logical volume "lv0" created
[root@qiuri ~]#
格式化：
[root@qiuri ~]# mkfs.ext3 /dev/vg0/lv0
[root@qiuri ~]# mkdir /mnt/lv0
[root@qiuri ~]# mount /dev/vg0/lv0 /mnt/lv0/
查看：
[root@qiuri ~]# pvdisplay /dev/hdd1
--- Physical volume ---
PV Name 163M 0 163M 0% /dev/shm
/dev/mapper/vg0-lv0 1.5G 18M 1.4G 2% /mnt/lv0
[root@qiuri ~]#
减小逻辑卷大小：
注意：如果当前逻辑卷有数据的话,注意先备份
[root@qiuri ~]# lvreduce -L -200M /dev/vg0/lv0
卸载：
[root@qiuri ~]# lvremove /dev/vg0/lv0
Logical volume "lv0" successfully removed
[root@qiuri ~]# vgremove vg0
Volume group "vg0" successfully removed
[root@qiuri ~]# pvremove /dev/hdd1 /dev/hdd2 /dev/hdd3 /dev/hdd4
/dev/cdrom: open failed: Read-only file system
Attempt to close device ''/dev/cdrom'' which is not open.
Labels on physical volume "/dev/hdd1" successfully wiped
Labels on physical volume "/dev/hdd2" successfully wiped
Labels on physical volume "/dev/hdd3" successfully wiped
Labels on physical volume "/dev/hdd4" successfully wiped
[root@qiuri ~]# pvscan
/dev/cdrom: open failed: Read-only file system
Attempt to close device ''/dev/cdrom'' which is not open.
PV /dev/hda2 VG VolGroup00 lvm2 [29.88 GB / 0 free]
Total: 1 [29.88 GB] / in use: 1 [29.88 GB] / in no VG: 0 [0 ]
[root@qiuri ~]#
实验：
RAID:5
LVM
本文出自 “it民工” 博客,请务必保留此出处http://zyw1209.blog.51cto.com/1266169/441583 |
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