Logical Volume Manager (LVM) basic commands


  • Put a PVID on a disk
                     chdev -l hdisk1 -a pv=yes
  • PVIDs are automatically placed on a disk when added to a VG Remove a PVID from a disk
                     chdev -l hdisk1 -a pv=clear
  • List all PVs in a system (along) with VG membership
                      lspv
  • Create a VG called datavg using hdisk1 using 64 Meg PPs
                      mkvg -y datavg -s 64 hdisk1
  • Create a LV on (previous) datavg that is 1 Gig in size
                      mklv -t jfs2 -y datalv datavg 16
  • List all LVs on the datavg VG
                      lsvg -l datavg
  • List all PVs in the datavg VG
                       lsvg -p datavg
  • Take the datavg VG offline
                       varyoffvg datavg
  • Remove the datavg VG from the ODM
                      exportvg datavg

Also Read: Storage Area Network (SAN) Basic Free Tutorials
  • Import the VG on hdisk5 as datavg
                     importvg -y datavg hdisk5
  • Vary-on the new datavg VG (can use importvg -n)
                    varyonvg datavg
  • List all VGs (known to the ODM)
                      lsvg
  • List all VGs that are on line
                      lsvg -o
  • Check to see if underlying disk in datavg has grown in size
                    chvg -g datavg
  • Move a LV from one PV to another
                    migratepv -l datalv01 hdisk4 hdisk5
  • Delete a VG by removing all PVs with the reducevg command.
                   reducevg hdisk3 (-d removes any LVs that may be on that PV)




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