下面这段操作的目标是为/dev/vg00/lvol1建立mirror，如果主磁盘损坏，可以确保处于这块硬盘上的
lvol1数据不丢失。
# vgdisplay -v
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 9
Open LV 9
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 4384
VGDA 4
PE Size (Mbytes) 16
Total PE 8759
Alloc PE 2278
Free PE 6481
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 1.0.0
--- Logical volumes ---
LV Name /dev/vg00/lvol1
LV Status available/syncd
LV Size (Mbytes) 1792
Current LE 112
Allocated PE 112
Used PV 1
LV Name /dev/vg00/lvol2
LV Status available/syncd
LV Size (Mbytes) 8192
Current LE 512
Allocated PE 512
Used PV 1
LV Name /dev/vg00/lvol3
LV Status available/syncd
LV Size (Mbytes) 1024
Current LE 64
Allocated PE 64
Used PV 1
LV Name /dev/vg00/lvol4
LV Status available/syncd
LV Size (Mbytes) 512
Current LE 32
Allocated PE 32
Used PV 1
LV Name /dev/vg00/lvol5
LV Status available/syncd
LV Size (Mbytes) 112
Current LE 7
Allocated PE 7
Used PV 1
LV Name /dev/vg00/lvol6
LV Status available/syncd
LV Size (Mbytes) 4960
Current LE 310
Allocated PE 310
Used PV 1
LV Name /dev/vg00/lvol7
LV Status available/syncd
LV Size (Mbytes) 2960
Current LE 185
Allocated PE 185
Used PV 1
LV Name /dev/vg00/lvol8
LV Status available/syncd
LV Size (Mbytes) 8704
Current LE 544
Allocated PE 544
Used PV 1
LV Name /dev/vg00/myswap
LV Status available/syncd
LV Size (Mbytes) 8192
Current LE 512
Allocated PE 512
Used PV 1
--- Physical volumes ---
PV Name /dev/disk/disk2
PV Status available
Total PE 4375
Free PE 2097
Autoswitch On
Proactive Polling On
PV Name /dev/dsk/c2t0d0
PV Status available
Total PE 4384
Free PE 4384
Autoswitch On
Proactive Polling On
#
# lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c2t0d0
The newly allocated mirrors are now being synchronized. This operation will
take some time. Please wait ....
Logical volume "/dev/vg00/lvol1" has been successfully extended.
lvlnboot: LIF information corrupt or not present on "/dev/dsk/c2t0d0".
Use the "mkboot" command to initialize the LIF area.
Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf
# lvdisplay /dev/vg00/lvol1
--- Logical volumes ---
LV Name /dev/vg00/lvol1
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 1792
Current LE 112
Allocated PE 224
Stripes 0
Stripe Size (Kbytes) 0
Bad block off
Allocation strict/contiguous
IO Timeout (Seconds) default
#
因为生成备份时，如下所示，并不生成lvm头信息备份，主磁盘坏盘后需要手动创建vg00，并将这块盘导入。
导入过程尚未测试。
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