Linux软件Raid试验(2)

接上篇,我们在已经建立好的raid5卷组md0上创建lvm卷

创建pv.

  pvcreate /dev/md0

创建vg

  vgcreate testvg /dev/md0

检查vg

[root@test ~]# vgdisplay
--- Volume group ---
VG Name testvg
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 3.99 GiB
PE Size 4.00 MiB
Total PE 1022
Alloc PE / Size 1022 / 3.99 GiB
Free PE / Size 0 / 0
VG UUID ShZwhx-qZ3J-GQMQ-FgRs-CnK3-hOzX-3SJMON

注意红字1022,是PE数,将来创建lv的时候使用
创建lv

lvcreate -l 1022 /dev/testvg

上面的1022就是上面的1022(整个磁盘作为一个lv,也可以用-L 600M之类的方法添加lv.
格式化lv

[root@test ~]# mkfs.ext4 /dev/testvg/lvol0

格式化过程输出

mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=128 blocks, Stripe width=256 blocks
261632 inodes, 1046528 blocks
52326 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1073741824
32 block groups
32768 blocks per group, 32768 fragments per group
8176 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736

Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 38 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

在/目录下添加/data目录,在/etc/fstab中添加挂载项:

/dev/testvg/lvol0 /data ext4 defaults 0 0

mount -a挂载
mount检查挂载情况

[root@test ~]# mount
/dev/sda1 on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
/dev/mapper/testvg-lvol0 on /data type ext4 (rw)

至此lvm试验完成

下一篇将实验模拟损坏磁盘及raid和lvm扩容