Several weeks ago we performed a resiliency test on a VMAX10k that was about to be put into production. The customer wanted confirmation that the array was wired up properly and would respond correctly in case there were any issues like a power or disk failure. This is fairly standard testing and makes sense: better to pull a power plug and see the array go down while there is no production running against it, right?
We pulled one power feed from each system bay and storage bay. Obviously: no problem for the VMAX, it dialed out, notified EMC it lost power on a couple of feeds and that’s it. Next up we yanked out a drive: I/O continued, the array dialed out to EMC that something was wrong with a drive, but… we didn’t see anything in Unisphere for VMAX!