Moving objects between disk groups

To move a self-contained set of VxVM objects from an imported source disk group to an imported target disk group, use the following command:

# vxdg [-o expand] [-o override|verify] move sourcedg targetdg \
  object ...

The -o expand option ensures that the objects that are actually moved include all other disks containing subdisks that are associated with the specified objects or with objects that they contain.

The default behavior of vxdg when moving licensed disks in an EMC array is to perform an EMC disk compatibility check for each disk involved in the move. If the compatibility checks succeed, the move takes place. vxdg then checks again to ensure that the configuration has not changed since it performed the compatibility check. If the configuration has changed, vxdg attempts to perform the entire move again.

Note:

You should only use the -o override and -o verify options if you are using an EMC array with a valid timefinder license. If you specify one of these options and do not meet the array and license requirements, a warning message is displayed and the operation is ignored.

The -o override option enables the move to take place without any EMC checking.

The -o verify option returns the access names of the disks that would be moved but does not perform the move.

The following output from vxprint shows the contents of disk groups rootdg and mydg.

The output includes two utility fields, TUTIL0 and PUTIL0.. VxVM creates these fields to manage objects and communications between different commands and Symantec products. The TUTIL0 values are temporary; they are not maintained on reboot. The PUTIL0 values are persistent; they are maintained on reboot.

# vxprint
Disk group: rootdg
TY NAME        ASSOC      KSTATE   LENGTH     PLOFFS   STATE   TUTIL0   PUTIL0      
dg rootdg      rootdg     -        -          -        -       -        -
dm rootdg02    hdisk6     -        17678493   -        -       -        -
dm rootdg03    hdisk7     -        17678493   -        -       -        -
dm rootdg04    hdisk9     -        17678493   -        -       -        -
dm rootdg06    hdisk10    -        17678493   -        -       -        -

Disk group: mydg
TY NAME        ASSOC      KSTATE   LENGTH     PLOFFS   STATE   TUTIL0   PUTIL0 
dg mydg        mydg       -        -          -        -       -        -
dm mydg01      hdisk5     -        17678493   -        -       -        -
dm mydg05      hdisk9     -        17678493   -        -       -        -
dm mydg07      hdisk11    -        17678493   -        -       -        -
dm mydg08      hdisk12    -        17678493   -        -       -        -
v  vol1        fsgen      ENABLED  2048       -        ACTIVE  -        -
pl  vol1-01    vol1       ENABLED  3591       -        ACTIVE  -        -
sd mydg01-01   vol1-01    ENABLED  3591       0        -       -        -
pl vol1-02     vol1       ENABLED  3591       -        ACTIVE  -        -
sd mydg05-01   vol1-02    ENABLED  3591       0        -       -        -

The following command moves the self-contained set of objects implied by specifying disk mydg01 from disk group mydg to rootdg:

# vxdg -o expand move mydg rootdg mydg01

The moved volumes are initially disabled following the move. Use the following commands to recover and restart the volumes in the target disk group:

# vxrecover -g targetdg -m [volume ...]
# vxvol -g targetdg startall

The output from vxprint after the move shows that not only mydg01 but also volume vol1 and mydg05 have moved to rootdg, leaving only mydg07 and mydg08 in disk group mydg:

# vxprint
Disk group: rootdg
TY NAME        ASSOC      KSTATE    LENGTH     PLOFFS   STATE   TUTIL0   PUTIL0 
dg rootdg      rootdg     -         -          -        -       -        -
dm mydg01      hdisk5     -         17678493   -        -       -        -
dm rootdg02    hdisk6     -         17678493   -        -       -        -
dm rootdg03    hdisk7     -         17678493   -        -       -        -
dm rootdg04    hdisk8     -         17678493   -        -       -        -
dm mydg05      hdisk9     -         17678493   -        -       -        -
dm rootdg06    hdisk10    -         17678493   -        -       -        -
v  vol1        fsgen      ENABLED   2048       -        ACTIVE  -        -
pl  vol1-01    vol1       ENABLED   3591       -        ACTIVE  -        -
sd mydg01-01   vol1-01    ENABLED   3591       0        -       -        -
pl vol1-02     vol1       ENABLED   3591       -        ACTIVE  -        -
sd mydg05-01   vol1-02    ENABLED   3591       0        -       -        -

Disk group: mydg
TY NAME        ASSOC      KSTATE    LENGTH     PLOFFS   STATE   TUTIL0   PUTIL0 
dg mydg        mydg       -         -          -        -       -        -
dm mydg07      hdisk11    -         17678493   -        -       -        -
dm mydg08      hdisk12    -         17678493   -        -       -        -

The following commands would also achieve the same result:

# vxdg move mydg rootdg mydg01 mydg05
# vxdg move mydg rootdg vol1

More Information

Changing subdisk attributes

Moving objects between shared disk groups