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08-06-2011 04:37 AM
08-06-2011 04:37 AM
HP Smart Array 6402 Controller question
Hi,
I've a couple of questions related to this controller.
Can it be operated without the batteries installed ? (the idea is using it inside a workstation that's turned off daily, and for various hours.. so I suspect that putting new batteries in the controller and memory module would be just a waste and they would die quickly. At the moment I've been forced to remove the controller since the batteries are so down that the card hangs during its own diags and it prevents the system from booting).
I've seen a couple of 3 pin plugs located next to the border of the card, on the side of the memory module slot. They are not documented in the pdf I've managed to find related to this controller, as are not documented the slot like connectors present on one side of the memory module, and on the top of the controller.
Are any of these allowing to give 3.3v power directly from the psu ( I would not dislike power while being operated, to make the cache working)?
If not, what is their usage ? (especially the 2 3pin ones)
Alessandro
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08-07-2011 07:00 AM
08-07-2011 07:00 AM
Re: HP Smart Array 6402 Controller question
The controller needs a battery in order to enable the write cache.
If the power is lost, the battery holds the cache contents until the power comes back (or the battery is empty), then it continues to write the data to the disks.
So you can see, power the cache from "normal" power source will not help in such case.
However, if you do a proper shutdown, the battery is not used while the power is off, because the cache is flushed to disk and empty.
Hope this helps!
Regards
Torsten.
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08-07-2011 01:55 PM
08-07-2011 01:55 PM
Re: HP Smart Array 6402 Controller question
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08-07-2011 11:04 PM
08-07-2011 11:04 PM
Re: HP Smart Array 6402 Controller question
As far as this goes it looks like they ought to last 3 days: http://h18004.www1.hp.com/products/servers/proliantstorage/options/256bbwc/
Isn't it possible to simply disconnect the battery module?
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08-09-2011 07:52 AM
08-09-2011 07:52 AM
Re: HP Smart Array 6402 Controller question
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08-13-2011 07:52 AM
08-13-2011 07:52 AM