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тАО03-16-2010 10:01 AM
тАО03-16-2010 10:01 AM
EVA battery backup
We have EVA6k at the remote site. Suddenly there was some unplanned power outage. All the servers were shutdown including the SMA. i am not able to access the storage now, no batteries in the UPS too. Will there be battery backup in the EVA.
If so do we need to shutdown the EVA through OCP(incase if the storage is up with the battery backup)
please guide me
If so do we need to shutdown the EVA through OCP(incase if the storage is up with the battery backup)
please guide me
2 REPLIES 2
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тАО03-16-2010 12:34 PM
тАО03-16-2010 12:34 PM
Re: EVA battery backup
The EVA uses rechargeable batteries to protect unwritten data in its writeback cache memory, but those batteries are way too small to keep an entire EVA running.
If you do a planned power down it it recommended to shut down the servers first. This will close all databases and files. Then shut down the EVA from Command View EVA. This makes sure that that data in the writeback cache is sent to disk before the EVA shuts down.
In most cases the EVA also turns off the batteries so that they don't get drained without a need.
If you do a planned power down it it recommended to shut down the servers first. This will close all databases and files. Then shut down the EVA from Command View EVA. This makes sure that that data in the writeback cache is sent to disk before the EVA shuts down.
In most cases the EVA also turns off the batteries so that they don't get drained without a need.
.
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тАО03-17-2010 03:48 AM
тАО03-17-2010 03:48 AM
Re: EVA battery backup
So, being an unplanned power outage, I presume everything was active at the time, therefore there would be data in the EVA cache waiting to be written to the disks. And, being an unplanned power outage, I presume power would be restored within a couple days.
Assuming they were charged properly prior to the outage, the EVA cache batteries are doing there job; data will finish being written once power is back up. Be sure to have all SAN-attached servers wait for the EVA and fibre switches to fully start before allowing them to start.
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Assuming they were charged properly prior to the outage, the EVA cache batteries are doing there job; data will finish being written once power is back up. Be sure to have all SAN-attached servers wait for the EVA and fibre switches to fully start before allowing them to start.
----------
If you think this message has been helpful, please assign points. I collect them (as do the other respondents here in the forums). Kind of like stamps.
Note: While I am an HPE Employee, all of my comments (whether noted or not), are my own and are not any official representation of the company
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
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