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131Administering dynamic multipathing (DMP)
How DMP works
3 Restart all the volumes in each disk group:
# vxvol -g diskgroup startall
The output from the vxdisk list command now shows only HP-UX native
multipathing metanode names, for example:
# vxdisk list
DEVICE TYPE DISK GROUP STATUS
disk155 auto:LVM - - LVM
disk156 auto:LVM - - LVM
disk224 auto:cdsdisk - - online
disk225 auto:cdsdisk - - online
disk226 auto:cdsdisk - - online
disk227 auto:cdsdisk - - online
disk228 auto:cdsdisk - - online
disk229 auto:cdsdisk - - online
When HP-UX native multipathing is configured, no DMP metanodes are
configured for the devices in the /dev/disk and /dev/rdisk directories.
As a result, the
vxdisk list command only displays the names of the
HP-UX native multipathing metanodes, and cannot display legacy names
for the devices.
To migrate from HP-UX native multipathing to DMP
1 Stop all the volumes in each disk group on the system:
# vxvol -g diskgroup stopall
2 Use the following commands to initiate the migration:
# vxddladm rmforeign blockdir=/dev/disk chardir=/dev/rdisk
# vxconfigd -kr reset
3 Restart all the volumes in each disk group:
# vxvol -g diskgroup startall
The output from the vxdisk list command now shows DMP metanode
names according to the current naming scheme. For example, under the
default or legacy naming scheme, vxdisk list displays the devices as:
# vxdisk list
DEVICE TYPE DISK GROUP STATUS
c2t0d0 auto:LVM - - LVM
c3t2d0 auto:LVM - - LVM
c89t0d0 auto:cdsdisk - - online
c89t0d1 auto:cdsdisk - - online
c89t0d2 auto:cdsdisk - - online
c89t0d3 auto:cdsdisk - - online
c89t0d4 auto:cdsdisk - - online
c89t0d5 auto:cdsdisk - - online