When adding new volumes make sure that each disk group has disks of the same size and that the number of disks per node is the same.
To add new EBS volumes in a running cluster
Create and attach new volumes to the database node instances. Attach the volumes using disk names xvdba through xvdbz and xvdca through xvdcz - these disks will be shared automatically by FlashGrid Storage Fabric.
Confirm FlashGrid names of the new drives, e.g. rac2.xvdbb
$ flashgrid-cluster drives
If the new drives are not listed then check that the corresponding devices (e.g. /dev/xvdbb) are visible in the OS. If they are visible in the OS then run
# flashgrid-node reload-configand check output of
flashgrid-cluster drivesagain. If they are not visible in the OS then double-check that you have attached them with correct device names.
Add the new disks to an existing disk group (or create a new disk group). Example:
[grid@rac1 ~] $ flashgrid-dg add-disks -G MYDG -d /dev/flashgrid/rac.xvdb[a-c]