Hello Saifuddin,
1. Ensure that the HyperFlex cluster is healthy before starting the replacement. Check for any warnings or errors that might need addressing.
2. Confirm the exact drives that have failed and are blacklisted. This can be done through the HyperFlex Connect interface or via the command line.
3. If possible, place the node with the failed drives into maintenance mode. This will help minimize the impact on the cluster's performance.
4. Physically Replace the Drives: Locate the failed drives in the server chassis; Remove the failed drives carefully; Insert the new drives into the same slots.
5. Once the drives are replaced, the system should automatically detect the new drives and start the process of rebuilding data.
6. Keep an eye on the rebuild process through HyperFlex Connect. This can take some time depending on the amount of data and the performance of the system.
7. After the rebuild is complete, check the overall health of the HyperFlex cluster to ensure everything is functioning correctly.
Note: Prefer performing the activity for one disk at a time.
Managing disks: https://www.cisco.com/c/en/us/td/docs/hyperconverged_systems/HyperFlex_HX_DataPlatformSoftware/AdminGuide/5-0/b-hxdp-admin-guide-5-0/m_hxdp_disks_manage.html
Thanks,
Shiv