cant find doc id 2098527.1
Hello Chinenye,
You might attempt quiescing IO from other LUNs and attempting to do your operations serially if possible. Settings (tuning) for Oracle RAC are typically done at the time the configuration is set up as they cannot be changed without invasive measures (backup and restore). Refer to attached document which includes detail in regard to this. 2098527.1 - Deploying Oracle 11gR2/12c RAC Databases with Fibre Channel LUNs on Oracle ZFS Storage Appliance Clusters - SPARC Solaris
Best regards, Jeff