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Again, the advice of someone who doesn’t know what he talks about. With that command, you activate the write cache ON THE DISKS, which isn’t protected by anything. It’s stupid to do so. What you want is active the write cache on the CONTROLLER, then configure the cache ratio if necessary. It’s sickening how many people give this bad and dangerous advice.

Hp Smart Array Software

The command you need is hpacucli ctrl slot=0 modify nbwc=enable to enable the write cache even if the battery is faulty or not present. It’s dangerous so don’t do it in a production environment unless absolutely necessary.

Get a new battery ASAP. And stay away from the drive write cache (dwc).