How to add/remove vdisk to/from Guest LDOMS online

Prerequisites

In order to add vdisk online to a guest LDOM, the SMF service svc:/platform/sun4v/drd must be online in Guest LDOM :

ldom01 # svcs drd
STATE STIME FMRI
online Feb_12 svc:/platform/sun4v/drd:default

1. Adding ZFS volume

primary # zpool list 
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT 
ldom 86.5G 14.6G 71.9G 16% 1.00x ONLINE - 
rpool 136G 20.5G 115G 15% 1.00x ONLINE -

primary # zfs create -V 5G ldom/disk2 
primary # ldm add-vdsdev /dev/zvol/dsk/ldom/disk2 disk2@primary-vds0 
primary # ldm add-vdisk disk2 disk2@primary-vds0 ldom01

2. Adding a disk

primary # ldm add-vdsdev /dev/dsk/c1t0d0s2 disk2G@primary-vds0
primary # ldm add-vdisk disk2 disk2@primary-vds0 ldom01

3. Adding a file as vdisk

primary # mkfile 5g /ldom/disk2 
primary # ldm add-vdsdev /ldom/disk2 disk2@primary-vds0 
primary # ldm add-vdisk disk2 disk2@primary-vds0 ldom01

Saving the changes permanently

Make sure you save the configuration changes permanently to the SP-config :

primary# ldm add-spconfig config-feb122014

primary# ldm ls-spconfig
factory-default
config-feb122014 [current]

Verify

Make sure that the vdisk addition is successful in the guest LDOM :

ldom01 # devfsadm -Cv

ldom01 # echo | format 
Searching for disks...done

AVAILABLE DISK SELECTIONS: 
0. c0d0  
/virtual-devices@100/channel-devices@200/disk@0 
1. c0d1  
/virtual-devices@100/channel-devices@200/disk@1 
Specify disk (enter its number):

We can also verify the addition of vdisks from the control domain :

primary# ldm list -o disk ldom01 
NAME 
ldom01

DISK 
NAME VOLUME TOUT ID DEVICE SERVER MPGROUP 
vdisk1 vol1@primary-vds0 0 disk@0 primary 
disk2 disk2@primary-vds0 1 disk@1 primary

Removing vdisk from Guest LDOM

Make sure that the vdisk is not being used in the guest LDOM.