We recently installed a cluster of Quantum 3920 with dual 10G connectivity.
They are really fast devices, the boot time is impressive and they integrate perfectly in the R82 SMS along with the relevant hotfix and Smart Console version.
We only have an issue on one of the systems where it's impossible to go in Expert mode, regardless of the authentication method (shared or per user).
In SSH, it gives:
/bin/clish: symbol lookup error: /usr/lib/cli/lib/libcli_cmd.so: undefined symbol: pam_start
while in serial console, it just displays "\b".
In both cases, the connection is closed afterwards.
Not much documentation yet for R82.10 and we're just getting started with the cluster, we'll check for features and commands in the coming weeks.