[root@test /]# touch /etc/lvmtab
[root@test /]# vgscan
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume group
[root@test /]# pvcreate /dev/sdd1
pvcreate -- physical volume "/dev/sdd1" successfully created
[root@test /]# pvcreate /dev/sde1
pvcreate -- physical volume "/dev/sde1" successfully created
[root@test /]# vgcreate somang /dev/hdc1 /dev/hdd1
vgcreate -- INFO: using default physical extent size 4 MB
vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte
vgcreate -- doing automatic backup of volume group "somang"
vgcreate -- volume group "somang" successfully created and activated
[root@test /]# vgdisplay
--- Volume group ---
VG Name               test
VG Access             read/write
VG Status             available/resizable
VG #                  0
MAX LV                256
Cur LV                0
Open LV               0
MAX LV Size           255.99 GB
Max PV                256
Cur PV                2
Act PV                2
VG Size               57.16 GB
PE Size               4 MB
Total PE              14634
Alloc PE / Size       0 / 0
Free  PE / Size       14634 / 57.16 GB
VG UUID               ytmQEb-D4RU-a6R0-QTB4-ipip-LXDO-6N46h1
[root@test /]# lvcreate -L 57160M -n test1 test
lvcreate -- doing automatic backup of "somang"
lvcreate -- logical volume "/dev/test/test1" successfully created
[root@test /]# lvscan
lvscan -- ACTIVE            "/dev/test/test1" [55.82 GB]
lvscan -- 1 logical volumes with 55.82 GB total in 1 volume group
lvscan -- 1 active logical volumes
[root@test /]# mkfs.ext3 /dev/test/test1
mke2fs 1.32 (09-Nov-2002)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
7323648 inodes, 14632960 blocks
731648 blocks (5.00%) reserved for the super user
First data block=0
447 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424
Writing inode tables:                            
Creating journal (8192 blocks):
Writing superblocks and filesystem accounting information: none
done
This filesystem will be automatically checked every 33 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[root@test /]#

[root@test]#
[root@test]#
[root@test /]# umount /test
[root@test /]# df -k
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda3             28418520   2553192  24421724  10% /
/dev/hda1                99043      9324     84605  10% /boot
none                    127632         0    127632   0% /dev/shm
[root@test /]# clear
[root@test /]# mount /dev/test1/test1 /test
mount: special device /dev/test1/test1 does not exist
[root@test /]# lvscan
lvscan -- ACTIVE            "/dev/test/test1" [55.82 GB]
lvscan -- 1 logical volumes with 55.82 GB total in 1 volume group
lvscan -- 1 active logical volumes
[root@test /]# mount /dev/test/test1 /test
[root@test /]# df -k
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda3             28418520   2553196  24421720  10% /
/dev/hda1                99043      9324     84605  10% /boot
none                    127632         0    127632   0% /dev/shm
/dev/test/test1   57612548     32828  54653128   1% /test
[root@test /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/hda3              28G  2.5G   24G  10% /
/dev/hda1              97M  9.2M   83M  10% /boot
none                  125M     0  125M   0% /dev/shm
/dev/test/test1    55G   33M   53G   1% /test
[root@test /]#  

[root@test /]#tar cvf - /homepage | ( cd /test; tar xvf - )

   ---- 데이터 백업 명령.

▣ Hot Swap Disk

 P.S - 작업 하면서 ......

    이번 작업을 하면서 시스템 자체 에서 hotswap 기능을 지원 해도  disk 가 hotswap 지원을 하지 않으면 시스템 운영중에 새로 설치한 디스크를 인식 하지 못 합니다.디스크 설치시 먼저 디스크가 hot swap 지원하는지 확인 후 작업을 해야 합니다.만약 hot swap 지원하지 않는 디스크를 시스템 운영중에 설치 하면 장비 , 디스크에 손상이 발생 할수 있습니다......^^