I upgraded to 7.1.2 today and it resulted in multiple issues for me:
high CPU usage
'domains' share went missing
a seemingly healthy disk got disabled
rebuild was going at 230kbps, these are enterprise grade SAS disks
Downgraded back to v7.0.0 and immediately issues 1 and 2 resolved, disk rebuild (same disk no changes) is now rebuilding at 280MBps(+11,000x faster)