HP Smart Array 6400 Controller Array Accelerator Post-Write Cache is temporarily disabled

Problem:
Message during boot on a HP ProLiant server with a HP Smart Array 6400 Array Controller:
… Array Accelerator Battery Charge Low
Array Accelerator Posted-Write Cache is temporarily disabled.
Array Accelerator batteries have failed to charge and should be …

Solution:
– Update driver
– Reboot server
– Update firmware using online flash
– Reboot server

Now the following message is displayed
… Array Accelerator Battery Charge Low
Array Accelerator Posted-Write Cache is temporarily disabled.
Array Accelerator will be reenabled when batteries reach full…

After batteries are on full charge again, the issue is fixed.
If batteries still fail, replace batteries.

Thanks to my college Michael for this procedure.

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6 thoughts on “HP Smart Array 6400 Controller Array Accelerator Post-Write Cache is temporarily disabled”

  1. I have a question regarding a similar issue.

    On a ML570 G3 I have just aquired at auction, using the HP Smart Array 6400, I recieve the message same message string:

    “Array Accelerator will be reenabled when batteries reach full…”

    What is a reasonable time frame that one should exspect for this “Charge to Full” to complete. If you are still getting this message is it indicative that the battery will take a full charge at some point, or is it possible that it may not and needs replacement?

    1. I found this in one of the Smart Array 6400 manuals (HP Smart Array Controller technology, 2nd edition): “Battery recharge takes between 30 minutes and 2 hours, depending on the remaining capacity level.”. I guess if it did not charge after 2 hours it would need replacement.

  2. hi, i have a problem on a ML370 G3 with a 6400 controller. i have just replaced the batteries, but on boot up it still says batteries failed and need to be replaced

    so far i have used 2 sets of batteries, and i get the same problem, so the problem cannot be the batteries anymore. i think it could be the controller, but i am avoiding having to replace the it,

    please help

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    explorer, might check this? IE still is thhe marketplace chief and a big section of other folks will omit your wonderful writing due
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