=======================increase10G for/data=============================
(system env /dev/MongoData00/LV00 197G /data)
#lvs
#lvdisplay MongoData00
+10G disk on VMware
#fdisk -l
#fdisk /dev/sdf ->n,p,1,,,w
#fdisk -l ,(show /dev/sdf1)

#pvs
#pvdisplay
#pvcreate /dev/sdf1 (create pv to system)
#pvs

#vgs
#vgextend /dev/MongoData00 /dev/sdf1
#vgs
#vgdisplay /dev/MongoData00 (to check Alloc size,and free size/PE)

#lvs
#lvdisplay /dev/MongoData00/LV00 (to check lv/LE size)
#lvextend -L +9.99G /dev/MongoData00/LV00
#vgdisplay /dev/MongoData00

#resize2fs /dev/MongoData00/LV00 (fs to perfrom online resize)
#df -h

=========================reduce10G for/data========================
#service mongod stop
#umount /data
#lvs
#lvdisplay /dev/MongoData00/LV00

#e2fsck -f /dev/MongoData00/LV00
#resize2fs /dev/MongoData00/LV00 199G (set filesystem to smallsize <200G)
#lvreduce -L -9.99G /dev/MongoData00/LV00 (lvm to reduce 9.99G)
#lvresize -l -2 /dev/MongoData00/LV00 (lvm to reduce 2 LE)
#lvresize -l 51199 /dev/MongoData00/LV00 (set lvm size to 51199 LE)
#lvdisplay /dev/MongoData00/LV00
#e2fsck -f /dev/MongoData00/LV00
#resize2fs /dev/MongoData00/LV00 (filesystem will use all partion by default)
#mount /data

#lvs
#vgs
#pvs
#vgreduce /dev/MongoData00 /dev/sdf1 (remove /dev/sdf1 pv from vg)
#pvs
#pvremove /dev/sdf1 (remove pv from system)
#pvs
-10G disk on VMware
#df -h

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