Why only 1 tape drive is detected in this veeam backup and replication console?

2 Ultium LTO6 standalone tape drives are connected via the HBA card separately to this backup server with Veeam Backup and replication version 9.5. This backup server is setup with MS Windows 2008 R2 64-bit. In Device Manager, both HBA cards and tape drives were detected with correct details. See the attached screenshot. However, in the Veeam console > backup infrastructure, I saw only 1 tape drive. Please see the 2nd attachment. Any thing gone wrong with the setup? How to get the second drive detected and use in veeam console?

Thanks in advance.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I would refer this question to Veeam Support.
Dariusz TykaICT Infrastructure Specialist Senior Commented:
You may try to install HPE library & tape tools and make some test to confirm both drives are detected/operating properly.
If all is OK then the best will be as @Andrew suggested to contact Veeam support so they can check the logs.
MichaelBalackAuthor Commented:
Hi all,

Sorry for the big delay.

The culprit is the hba cards. Currently, we are using 2 hba cards, each with dual-port, with one drive connects to each hba card. The twist is, if we change to connect both drives on 1 hba card, both drives can be detected and shown on the veeam console.

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MichaelBalackAuthor Commented:
By attaching to this dual-port hba card, both tape drives are working.
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