Add ASM disk in Data Diskgroup to Grow Database Size step by Step guide
Expand your Oracle database storage safely — learn how to add new ASM disks to the +DATA diskgroup, rebalance ASM, and grow your database (add/resize datafiles or add tablespace) in Oracle 19c RAC on RHEL. This step-by-step tutorial covers OS-level prep (multipath/udev), Grid/ASM commands (asmcmd, sqlplus / as sysasm), rebalance tuning, verification, and common troubleshooting.
🔔 What you’ll learn
• Performing Rolling Opration on RAC DB nodes
• How to assign and prepare new LUNs/devices and update multipath(Cold plugin)
• How to add disks to ASM diskgroup DATA (cluster-wide)
• Manage ASM rebalance (power settings) and monitor progress
• Add or resize datafiles/tablespaces to consume new space
• Troubleshooting tips
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