Unmounted Volume Limit in Windows 10?

Is there a limit to the number of physical disks that can be connected to, but not mounted in a Windows 10 Pro x64 system?
If so, is there a registry key that can be used to increase this limit?

I use a 3rd party fiber connected storage system that presents available volumes to the system, and then mounts them as drive letters using a desktop client.
There are currently 97 of the volumes (again, not mounted with drive letters until I use the desktop client presents them as drive letters.)

On systems with locally attached storage or when plugging in an external USB drive, the system locks up. The magic number of total drives seems to be 100.
100 or fewer and all is well. Connect drive 101, and things stop working.

It's also possible that this is some limitation or problem with  the 3rd party software, but I thought that I would start with the OS first as a logical possibility.

Thanks.
njwireheadAsked:
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andyalderSaggar maker's framemakerCommented:
What fibre channel HBAs do you have?
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njwireheadAuthor Commented:
They're ATTO Celerity FC-41ES cards.
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Adam BrownSr Solutions ArchitectCommented:
Windows has a limit of about 28,000 "learned" or connected drives. With mount-points, all of those can be mounted at the same time if you're crazy. USB can have significant limits on number of devices, but if you're on a Fiber SAN, that's not likely applying.

https://blogs.technet.microsoft.com/privatecloud/2013/07/23/hyper-v-virtual-fibre-channel-design-guide/ might give you some guidance. It's possible you're running up against License-level limits in the version of Windows you're using, but that should happen way earlier than 100, as far as I know.
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andyalderSaggar maker's framemakerCommented:
It's more likely to be the driver running out of resources but you would have to ask Atto tech support as there's no documented limit from them that I could find.
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