LSI MegaCLI — Check For Failed Raid Controller Battery

701590_rusty_batteryThere are several tools that you can use to monitor and configure and LSI SAS controller, however as I have found, some are easier than others to use and some do not always display the correct information.

In my case my controller is a SAS 9260-8i, and when building a server I always make sure that I install the MegaRaid Storage Manager gui for configuring disks and setting up email alerts. However I have often found that this tool is sometimes confusing to use for other tasks so I also make sure that I install the MegaCLI (command line interface). Both utilities can be downloaded directly from LSI here.

MegaRaid Storage Manager installs to /usr/local/MegaRAID Storage Manager, while the cli installs via rpm to /opt/MegaRAID/MegaCli.

Anyway to check the battery status run the following (note i am running 64 bit os)

#>./MegaCli64 -AdpBbuCmd -aAll

Your output will be lengthy – but look for the line below to know if you need to replace your BBU.

Battery Replacement required            : Yes

Two additional usefully commands are:

  • megacli -AdpAllInfo -aALL lists all the adapters in the machine
  • megacli -PDList -aALL lists all disks and enclosures

Note that there is an open source CLI called Megactl, and while its quick and easy to use to see a quick list of your disks and their statuses, its not shown itself to be accurate when it comes to detecting whether or not a battery has failed. You can get it here

Additonal Megacli command can be found here; https://twiki.cern.ch/twiki/bin/view/FIOgroup/DiskRefPerc

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