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18.11. 在​​​​​​​客​​​​​​​座​​​​​​​端​​​​​​​磁​​​​​​​碟​​​​​​​映​​​​​​​像​​​​​​​檔​​​​​​​上​​​​​​​存​​​​​​​取​​​​​​​資​​​​​​​料​​​​​​​

您​​​​​​​可​​​​​​​以​​​​​​​使​​​​​​​用​​​​​​​兩​​​​​​​個​​​​​​​分​​​​​​​開​​​​​​​的​​​​​​​應​​​​​​​用​​​​​​​程​​​​​​​式​​​​​​​來​​​​​​​協​​​​​​​助​​​​​​​您​​​​​​​從​​​​​​​客​​​​​​​座​​​​​​​端​​​​​​​磁​​​​​​​碟​​​​​​​映​​​​​​​像​​​​​​​檔​​​​​​​存​​​​​​​取​​​​​​​資​​​​​​​料​​​​​​​。​​​​​​​在​​​​​​​您​​​​​​​使​​​​​​​用​​​​​​​這​​​​​​​些​​​​​​​工​​​​​​​具​​​​​​​前​​​​​​​，您​​​​​​​必​​​​​​​須​​​​​​​將​​​​​​​客​​​​​​​座​​​​​​​端​​​​​​​關​​​​​​​閉​​​​​​​。​​​​​​​從​​​​​​​客​​​​​​​座​​​​​​​端​​​​​​​與​​​​​​​ dom0 存​​​​​​​取​​​​​​​檔​​​​​​​案​​​​​​​系​​​​​​​統​​​​​​​可​​​​​​​能​​​​​​​會​​​​​​​造​​​​​​​成​​​​​​​系​​​​​​​統​​​​​​​損​​​​​​​壞​​​​​​​。​​​​​​​
您​​​​​​​可​​​​​​​以​​​​​​​使​​​​​​​用​​​​​​​ kpartx 應​​​​​​​用​​​​​​​程​​​​​​​式​​​​​​​來​​​​​​​執​​​​​​​行​​​​​​​分​​​​​​​割​​​​​​​磁​​​​​​​碟​​​​​​​或​​​​​​​ LVM 空​​​​​​​間​​​​​​​群​​​​​​​組​​​​​​​： 
yum install kpartx
kpartx -av /dev/xen/guest1
add map guest1p1 : 0 208782 linear /dev/xen/guest1 63
add map guest1p2: 0 16563015 linear /dev/xen/guest1 208845
欲​​​​​​​存​​​​​​​取​​​​​​​ LVM 空​​​​​​​間​​​​​​​於​​​​​​​第​​​​​​​二​​​​​​​分​​​​​​​割​​​​​​​區​​​​​​​，您​​​​​​​必​​​​​​​須​​​​​​​使​​​​​​​用​​​​​​​ vgscan 來​​​​​​​重​​​​​​​新​​​​​​​掃​​​​​​​描​​​​​​​ LVM，然​​​​​​​後​​​​​​​使​​​​​​​用​​​​​​​ vgchange -ay 指​​​​​​​令​​​​​​​來​​​​​​​啟​​​​​​​動​​​​​​​空​​​​​​​間​​​​​​​群​​​​​​​組​​​​​​​於​​​​​​​分​​​​​​​割​​​​​​​區​​​​​​​上​​​​​​​（預​​​​​​​設​​​​​​​上​​​​​​​稱​​​​​​​為​​​​​​​ VolGroup00）。​​​​​​​ 
# kpartx -a /dev/xen/guest1
#vgscan
Reading all physical volumes . This may take a while...
Found volume group "VolGroup00" using metadata type 1vm2
# vgchange -ay VolGroup00
2 logical volume(s) in volume group VolGroup00 now active.
# lvs
LV VG Attr Lsize Origin Snap% Move Log Copy%
LogVol00 VolGroup00 -wi-a- 5.06G
LogVol01 VolGroup00 -wi-a- 800.00M
# mount /dev/VolGroup00/LogVol00 /mnt/
....
#umount /mnt/
#vgchange -an VolGroup00
#kpartx -d /dev/xen/guest1
您​​​​​​​必​​​​​​​須​​​​​​​記​​​​​​​得​​​​​​​使​​​​​​​用​​​​​​​ vgchange -an 將​​​​​​​邏​​​​​​​輯​​​​​​​空​​​​​​​間​​​​​​​停​​​​​​​止​​​​​​​，並​​​​​​​在​​​​​​​結​​​​​​​束​​​​​​​後​​​​​​​移​​​​​​​除​​​​​​​ kpartx-d 的​​​​​​​分​​​​​​​割​​​​​​​區​​​​​​​，與​​​​​​​刪​​​​​​​除​​​​​​​ losetup -d 的​​​​​​​迴​​​​​​​路​​​​​​​裝​​​​​​​置​​​​​​​。​​​​​​​