Storage Group device limit troubleshooting

content/docs/csidriver/troubleshooting/powermax.md

@@ -21,3 +21,4 @@ description: Troubleshooting PowerMax Driver
 | Volume mount is failing on few OS(ex:VMware Virtual Platform) during node publish with error `wrong fs type, bad option, bad superblock` | 1. Check the multipath configuration(if enabled) 2. Edit Vm Advanced settings->hardware and add the param `disk.enableUUID=true` and reboot the node |
 | Standby controller pod is in crashloopbackoff state | Scale down the replica count of the controller pod's deployment to 1 using ```kubectl scale deployment <deployment_name> --replicas=1 -n <driver_namespace>``` |  
 | When running CSI-PowerMax with Replication in a multi-cluster configuration, the driver on the target cluster fails and the following error is seen in logs: `error="CSI reverseproxy service host or port not found, CSI reverseproxy not installed properly"` | The reverseproxy service needs to be created manually on the target cluster. Follow [the instructions here](../../../deployment/csmoperator/modules/replication#configuration-steps) to create it.|
+| PVC creation is failing with error `A problem occurred modifying the storage group resource: Failed to create batch task(s): The maximum allowed devices for a storage group has been exceeded`, this is because of a hardware limit of 4k devices.| Create a SC with a new unique `ApplicationPrefix` parameter (such as `ApplicationPrefix: OCPX`) or add a new unique `StorageGroup` parameter (such as `StorageGroup: "custom_SG_1"`).|