By Dylan Kerling – Velocity Tech Solutions
When dealing with any Dell server, there is generally going to be a raid controller; and depending on the model, you may have a PERC card or a SAS card.
The main differences are the cache and ability to use all raid levels on the PERC card. Whereas the SAS card can only run raid 0 and 1, along with not having any on board cache. Due the cache on the PERC cards, it also needs a battery to keep the cached data from being lost, in the case of power loss. Like all batteries, they only last so long before they’re worthless.
To see the status of the battery, the simplest way is through Dell Open Manage System Administrator (or OMSA for short.)
It can be downloaded from Dell’s website here: http://en.community.dell.com/techcenter/systems-management/w/wiki/1760.openmanage-server-administrator-omsa.aspx
The battery’s status can be checked under the storage sub-section, under the section labeled battery. It will let you know if it’s failed, charged or charging. When a battery has completely failed, typically the server will alert you with an amber light and error message on the front LCD. Replacing the battery immediately when the server alerts you is very important as a power loss occurring without a battery can lead to some issues and may not be able to write the cached data to the drives.
That wraps up this tech article. If you have any questions on this or any of our topics covered in previous posts, please feel free to contact us.
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