RAID5+LVM

RAID5+LVM

次试验在虚拟机中运行，加了一快20G的硬盘

 

磁盘分区情况：

   Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1        2610    20964793+   5  Extended

/dev/sdb5               1         244     1959867   83  Linux

/dev/sdb6             245         488     1959898+  83  Linux

/dev/sdb7             489         732     1959898+  83  Linux

/dev/sdb8             733         976     1959898+  83  Linux

/dev/sdb9             977        1220     1959898+  83  Linux

 

创建RAID:

mdadm --create --auto=yes /dev/md0  \
--level=5 --raid-devices=4 --spare-devices=1 /dev/sdb{5,6,7,8,9}

mdadm: array /dev/md0 started.

 

创建LVM：

pvcreate /dev/md0                        #新建PV

  Physical volume "/dev/md0" successfully created            

vgcreate raidvg /dev/md0             #新建VG

  Volume group "raidvg" successfully created

lvcreate -L 5G -n raidlv raidvg        #新建LV

  Logical volume "raidlv" created

lvdisplay

--- Logical volume ---

  LV Name                /dev/raidvg/raidlv

  VG Name                raidvg

  LV UUID                k1QTwo-ccYd-KnUj-O4nN-Hpmp-HVXj-96wGZg

  LV Write Access        read/write

  LV Status              available

  # open                 0

  LV Size                5.00 GB

  Current LE             1280

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     768

  Block device           253:2

 

创建文件系统挂载：

mkfs -t ext3 /dev/raidvg/raidlv
mkdir /raidfs
mount /dev/raidvg/raidlv /raidfs/

这样差不多就可以了，自己的一些想法，如果两块硬盘每个分两个区，然后再在上面建RAID成功之后建LVM

 

关闭RAID5跟LVM:

umount /raidfs/
lvremove /dev/raidvg/raidlv
vgchange -a  -n raidvg
vgremove raidvg
pvremove /dev/md0

  Labels on physical volume "/dev/md0" successfully wiped

mdadm --stop /dev/md0

mdadm: stopped /dev/md0

fdisk /dev/sdb