How to apply different version of VDDK other than the built-in Version (6.0.1) in Arcserve UDP

VMware Virtual Disk Development Kit (VDDK) 6.0.1 is built-in with Arcserve UDP Version 6.0. At the same time, Arcserve UDP Version 6.0 is compatible with VDDK 5.5.5.

If you want to use VDDK 5.5.5 instead of VDDK 6.0.1, follow these steps:

Download VDDK 5.5.5 from the VMware website.
Extract all files into a temporary folder.
From the following path, take a backup of the original bin folder by renaming it (example, bin_org):
<Arcserve UDP installation path>\Engine\BIN\VDDK\BIN\VDDK64

For example, C:\Program Files\Arcserve\Unified Data Protection\Engine\BIN\VDDK\BIN\VDDK64
Copy the bin folder from the temporary folder to <Arcserve UDP installation path>\Engine\BIN\VDDK\BIN\VDDK64.

Note: Only VDDK 6.0.1 and 5.5.5 are certified by Arcserve on top of Arcserve UDP Version 6.0. Other versions of VDDK are not guaranteed to work with Arcserve UDP Version 6.0.

If you want to perform Virtual Standby or Instant VM after applying different version of VDDK, follow these steps:

Run the following command to check the state of the service.
```
sc query vstor2-mntapi20-shared
```
Note: If the state of service is running, go to Step 2. If the specified service does not exist, go to Step 5 directly.
Run the following command to stop the service.
```
sc stop vstor2-mntapi20-shared
```
Run the following command to delete the service.
```
sc delete vstor2-mntapi20-shared
```
Run the following command to check if the service has been deleted successfully.
```
sc query vstor2-mntapi20-shared      
```
Note: If the state of service is STOP_PENDING, restart the machine.
Delete the vstor2-mntapi20-shared.sys file from the following location:
```
C:\Windows\SysWOW64\drivers
```
Navigate to the BIN folder.
```
<INSTALLDIR>\Engine\BIN
```
Run the following command:
```
ArcDrvInstall.exe -i "INSTALLDIR\Engine\BIN\VDDK\BIN\VDDK64\bin\AMD64\vstor2-mntapi20-shared.sys" -l <log file path> -p <product id>
```
Example: ArcDrvInstall.exe -i "C:\Program Files\Arcserve\Unified Data Protection\Engine\BIN\VDDK\BIN\VDDK64\bin\AMD64\vstor2-mntapi20-shared.sys" -l log.txt -p 2