My expectation would be that if you lost the second SP suddenly (from catastrophic hw failure), there's a very high probability you will have a data loss/corruption condition, as a cache destage to vault would not occur, and you have no 'clean' cache data on either sp.  LUNs with pending writes in cache would be marked dirty and taken offline requiring you to engage support/engineering to assist. Not fun.  Not a common condition at all though and there's a lot of safeguards to assist in preventing this from happening.  Although, cache protection and recovery has generally improved with each gen release, so maybe that's different again in vnx2, interesting to find out.
Hi, I've read in some documents and in Article Number:000169648 Version:9 - Which events will cause VNX MCx to disable write caching? that the SP Cache is still enable when a SP fails. Is that true?    If true... what prevents my cache data to be lost if my second SP fails too (hardware fault)?   Regards,  Thanks in advance Dario IPM
Is enabled my SP Write Cache in a VNX2 when a SP fails?