Cause-1: PostgreSQL service is not running

Problem: This error occurs when the PostgreSQL service is not properly started on the backup server machine or has stopped due to environmental reasons.

Solution:

1. Verify the status of the following PostgreSQL services in the "services.msc" console and start them if they are stopped:

   For BDRShield v5.3 and above: BDRShield PostgreSQL Database

   For BDRShield v5.0: VembuBDR PostgreSQL Database

   For BDRShield up to v4.2: VembuPostgreSQL

2. If the PostgreSQL services fail to start, follow these steps:

   a. Open the Task Manager on the machine.

   b. Go to the "Details" tab and check if "postgres.exe" is running. Also, terminate any child executables of VembuPostgreSQL, if present.

   c. Stop all BDRShield services running in "services.msc."

   Then start the services one-by-one in the following order:

   1. BDRShield PostgreSQL Database

   2. BDRShield WebServer

   3. BDRShield Backup Server Virtual Physical Workloads

   4. BDRShield Memcache for AWS

   5. BDRShield 360 Agent

   6. BDRShield WebService for AWS

   7. BDRShield WebSocket for AWS

   8. BDRShield Backup Server for AWS

   9. BDRShield Backup Server Google Workspace

   10. BDRShield Backup Server Microsoft 365

   11. BDRShield GranularRecovery for MS Applications

For BDRShield Client, follow the same steps but replace the service names with

1. BDRShield Client PostgreSQL Database
   
2. BDRShield Client WebServer
   
3. BDRShield Client for Virtual Physical Workloads
   
4. BDRShield Memcache for AWS
   

Cause-2: PostgreSQL data storage location drive letter changed

Problem: This error occurs when the drive letter for the installed PostgreSQL data storage location is changed.

Solution: Follow the steps in this link to migrate Vembu BDR/Vembu OffsiteDR internal database (PostgreSQL) files from one location to another.

Cause-3: Webserver browser cache

Problem: This error occurs due to Webserver browser cache.

Solution: Ensure you restart the BDRShield WebServer along with the BDRShield PostgreSQL Database services by starting PostgreSQL first and then the Webserver.

Cause-4: PostgreSQL database storage location configured in unsupported file system (exFAT)

Problem: This error occurs when the PostgreSQL database storage location is configured with the exFAT file system, which is not supported.

Solution: It is not recommended to install PostgreSQL service in the exFAT file system. The supported file systems are NTFS and ReFS, while the unsupported ones are FAT32, UDF, exFAT, NAS, and removable drives (USB Drive).

Note: Please make sure to select a supported file system (NTFS or ReFS) during the PostgreSQL installation.