To remove EBS volumes from a running cluster
Determine FlashGrid names of the drives to be removed, e.g. rac2.xvdbb:
$ flashgrid-cluster drives
If the drives are members of an ASM disk group then drop the drives from the disk group. Example:
SQL> alter diskgroup MYDG drop disk RAC1$XVDBB drop disk RAC2$XVDBB rebalance wait;
Prepare the disks for removal. Example:
[fg@rac1 ~] $ sudo flashgrid-node stop-target /dev/flashgrid/rac1.xvdbb [fg@rac2 ~] $ sudo flashgrid-node stop-target /dev/flashgrid/rac2.xvdbb
Detach the EBS volumes from the instances.