之前刷機提到在使用OEDA進行一鍵部署前，需先在所有DB節點上運行reclaimdisks.sh，也提到觀察會釋放pvs/vgs/lvs相對應的剩餘空間。
本文以一套X8環境爲例，來看下具體的表現，以加深理解。
1.reclaim的相關命令
查看當前的分區信息：
# /opt/oracle.SupportTools/reclaimdisks.sh -check
在一鍵部署前，需先在所有DB節點上運行reclaim：
# /opt/oracle.SupportTools/reclaimdisks.sh -free -reclaim
2.運行reclaim之前的情況
查看當前的分區信息：# /opt/oracle.SupportTools/reclaimdisks.sh -check
Model is ORACLE SERVER X8-2
Number of LSI controllers: 1
Physical disks found: 4 (252:0 252:1 252:2 252:3)
Logical drives found: 1
Linux logical drive: 0
RAID Level for the Linux logical drive: 5
Physical disks in the Linux logical drive: 4 (252:0 252:1 252:2 252:3)
Dedicated Hot Spares for the Linux logical drive: 0
Global Hot Spares: 0
Valid. Disks configuration: RAID5 from 4 disks with no global and dedicated hot spare disks.
Valid. Booted: Linux. Layout: Linux + DOM0.
可以看到最後有個DOM0。
此時查詢vgs/pvs/lvs信息，會發現vg中已經沒有可用空間了：
# vgs
VG #PV #LV #SN Attr VSize VFree
VGExaDb 1 7 0 wz--n- 3.27t 0
# pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 VGExaDb lvm2 a-- 3.27t 0
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
LVDbExaVMImages VGExaDb -wi-a----- 3.06t
LVDbOra1 VGExaDb -wi-ao---- 100.00g
LVDbSwap1 VGExaDb -wi-ao---- 24.00g
LVDbSys1 VGExaDb -wi-ao---- 30.00g
LVDbSys2 VGExaDb -wi-a----- 30.00g
LVDbSys3 VGExaDb -wi-a----- 30.00g
LVDoNotRemoveOrUse VGExaDb -wi-a----- 1.00g
3.運行reclaim之後的情況
執行reclaim：
# /opt/oracle.SupportTools/reclaimdisks.sh -free -reclaim
之後再次查詢vgs/pvs/lvs信息，會發現vg中已經有3T+可用空間：
# pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 VGExaDb lvm2 a-- 3.27t 3.09t
# vgs
VG #PV #LV #SN Attr VSize VFree
VGExaDb 1 5 0 wz--n- 3.27t 3.09t
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
LVDbOra1 VGExaDb -wi-ao---- 100.00g
LVDbSwap1 VGExaDb -wi-ao---- 24.00g
LVDbSys1 VGExaDb -wi-ao---- 30.00g
LVDbSys2 VGExaDb -wi-a----- 30.00g
LVDoNotRemoveOrUse VGExaDb -wi-a----- 1.00g
此時再去做check：
# /opt/oracle.SupportTools/reclaimdisks.sh -check
Model is ORACLE SERVER X8-2
Number of LSI controllers: 1
Physical disks found: 4 (252:0 252:1 252:2 252:3)
Logical drives found: 1
Linux logical drive: 0
RAID Level for the Linux logical drive: 5
Physical disks in the Linux logical drive: 4 (252:0 252:1 252:2 252:3)
Dedicated Hot Spares for the Linux logical drive: 0
Global Hot Spares: 0
Valid. Disks configuration: RAID5 from 4 disks with no global and dedicated hot spare disks.
Valid. Booted: Linux. Layout: Linux.
不難發現：lv裏面的那個3.06T的LVDbExaVMImages被回收了，同時check結果中的DOM0也隨之不見了。