解析linux中raid和lvm(尚观学习笔记)

[root@station230 ~]# mdadm  --create  /dev/md0  --level=5 --raid-devices=3 --spare-devices=1  /dev/sda{7,8,9,10}
 

[root@station230 md0]# mdadm -C /dev/md0 -l 5 -n 3 -x 1 /dev/sda{7,8,9,10}
[root@station230 md0]# mdadm -D /dev/md0
[root@station230 md0]# mdadm -Ds
[root@station230 md0]# mkfs.ext3 /dev/md0
[root@station230 ~]# mkdir /mnt/md0
[root@station230 ~]# linuxjishu/9952.html target=_blank class=infotextkey>mount /dev/md0  /mnt/md0
[root@station230 ~]# cd /mnt/md0
[root@station230 md0]# ls
lost+found

mknod 

/proc/devices

[root@station230 dev]# mdadm -Ds  > /etc/mdadm.conf
[root@station230 dev]# echo 'mount /dev/md0 /mnt/md0'  >>  /etc/rc.local
[root@station230 dev]# vim /etc/fstab
/dev/md0      /mnt/md0     ext3    defaults      0     0

[root@station230 dev]# mdadm -D /dev/md0
 Number   Major   Minor   RaidDevice State
       0       8        7        0      active sync   /dev/sda7
       1       8       10        1      active sync   /dev/sda10
       2       8        9        2      active sync   /dev/sda9
       3       8        8        -      faulty spare   /dev/sda8

[root@station230 dev]# mdadm -f /dev/md0  /dev/sda8
mdadm: set /dev/sda8 faulty in /dev/md0

[root@station230 dev]# mdadm -D /dev/md0
 Number   Major   Minor   RaidDevice State
       0       8        7        0      active sync   /dev/sda7
       1       8       10        1      active sync   /dev/sda10
       2       8        9        2      active sync   /dev/sda9
       3       8        8        -      faulty spare   /dev/sda8

[root@station230 dev]# mdadm -r /dev/md0 /dev/sda8
mdadm: hot removed /dev/sda8
[root@station230 dev]# mdadm -a /dev/md0 /dev/sda8
mdadm: added /dev/sda8

[root@station230 ~]# pvcreate /dev/sda{11,12,13,14}
  Physical volume "/dev/sda11" successfully created
  Physical volume "/dev/sda12" successfully created
  Physical volume "/dev/sda13" successfully created
  Physical volume "/dev/sda14" successfully created

[root@station230 ~]# vgcreate vg0 /dev/sda{11,12,13}
  Volume group "vg0" successfully created

[root@station230 dev]# lvcreate -L 70M -n lv0  vg0
  Rounding up size to full physical extent 72.00 MB
  Logical volume "lv0" created

[root@station230 dev]# mkdir /mnt/lv0
[root@station230 dev]# mkfs.ext3 /dev/vg0/lv0

[root@station230 dev]# mount /dev/vg0/lv0 /mnt/lv0
[root@station230 dev]# cd /mnt/lv0
[root@station230 lv0]# ls
lost+found

[root@station230 lv0]# pvdisplay
[root@station230 lv0]# pvscan

[root@station230 lv0]# vgdisplay
[root@station230 lv0]# vgscan

[root@station230 lv0]# lvdisplay
[root@station230 lv0]# lvscan

[root@station230 lv0]# vgextend vg0 /dev/sda14
  Volume group "vg0" successfully extended
 

[root@station230 lv0]# lvextend -L 100M /dev/vg0/lv0
  Extending logical volume lv0 to 100.00 MB
  Logical volume lv0 successfully resized
 

[root@station230 lv0]# lvextend -L +30M /dev/vg0/lv0

[root@station230 lv0]# resize2fs /dev/vg0/lv0 100M
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/vg0/lv0 is mounted on /mnt/lv0; on-line resizing required
Performing an on-line resize of /dev/vg0/lv0 to 102400 (1k) blocks.
The filesystem on /dev/vg0/lv0 is now 102400 blocks long.