We are running a rather large vSAN environment, it was suggested by VMware we upgrade the disk FW. Since I know IBM (Softlayer) it always takes a tremendous amount of time for these simple tasks, so I asked how long a disk firmware upgrade would take and I was told it would take about 2 hours. So I set my repair timer at 3 hours (knowing IBM/Softlayer) After actually trying it took more than 3 hours to complete, which resulted in a resync, which resulted in performance issues.
I have about 39 hosts to patch, do the math and it takes a crazy amount of downtime.
So please make this process better, I've done it many times myself an never did it take 3 to 4 hours.
This goes for every aspect of FW patching.
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