I have been requsted tp build a 2040 in a Active / Passive confguration allocating all 12 internal disks to the primary controller. Is it possible to do this leaving no disks for secondary controller? (will cluster failover still work)
I have always been told you need to reserve 3 disks for second controller + a spare?
Cluster failover won’t work. The minimum technically possible number of disks on passive system – 2 (you will get permanent warning status due to spares low). Arguably 3 in RAID_DP offers better resiliency than 2 in RAID4 + spare (and you can turn off spares low warning in this case).
This question comes up pretty often. Just do a search ☺