We are working on Commvault with Falconstor VTL POC. Our Commserve running on SP20.17. At first we have been provided with emulated HP tape library with LTO4 drives. When we initiate the backup, it failed with below error
![](https://uploads-eu-west-1.insided.com/commvault-eu/attachment/627c455d-951a-498a-bcd8-7401a55a384a.png)
Then, we also try with emulated HP tape library with LTO7 drives. Then we received almost the same previous error.
![](https://uploads-eu-west-1.insided.com/commvault-eu/attachment/614d4a2e-afde-49b8-a057-9500471436d9.png)
We also already update Tape Drive driver on Windows, but still the same. FYI, we are using Windows 2016 with Commvault SP20.17 on the Commserve server which running on VM. Need someone opinion. Please help. Thanks.