MegaCLI Cheat-sheet

Recently I've had to do extensive work with Dell PowerEdge servers, and specifically Dell's that use the LSI MegaRAID controllers. Anyone who has ever had to work with the LSI RAID controllers knows that the MegaCLI provided by LSI is the most cryptic command line utility in existence. MegaCli is available for Linux, DOS, Windows, Netware and Solaris. You can get it from LSI’s website (search for MegaRAID SAS).

Inside the tarball or zip file you’ll find an RPM archive which contains the MegaCli and MegaCli64 binaries (will be installed to /opt/MegaRAID/MegaCli).

Please note: This emergency cheat sheet is not exhaustive, but it should be sufficient in most cases. For a complete reference either call MegaCli -h or refer to the manual at:

While there are a lot of different parameters for MegaCli, some of them are always identical. These are described here in short.

Adapter parameter -aN The parameter -aN (where N is a number starting with zero or the string ALL) specifies the PERC5/i adapter ID. If you have only one controller it’s safe to use ALL instead of a specific ID, but you’re encouraged to use the ID for everything that makes changes to your RAID configuration.

Physical drive parameter -PhysDrv [E:S] For commands that operate on one or more pysical drives, the -PhysDrv [E:S] parameter is used, where E is the enclosure device ID in which the drive resides and S the slot number (starting with zero). You can get the enclosure device ID using “MegaCli -EncInfo -aALL”. The E:S syntax is also used for specifying the physical drives when creating a new RAID virtual drive.

Virtual drive parameter -Lx The parameter -Lx is used for specifying the virtual drive (where x is a number starting with zero or the string all).

Controller information

  MegaCli -AdpAllInfo -aALL
  MegaCli -CfgDsply -aALL
  MegaCli -AdpEventLog -GetEvents -f events.log -aALL && cat events.log

Enclosure information

  MegaCli -EncInfo -aALL 

Virtual drive information

  MegaCli -LDInfo -Lall -aALL 

Physical drive information

  MegaCli -PDList -aALL
  MegaCli -PDInfo -PhysDrv [E:S] -aALL 

Battery backup information

  MegaCli -AdpBbuCmd -aALL 

Controller management

Silence active alarm

  MegaCli -AdpSetProp AlarmSilence -aALL 

Disable alarm

  MegaCli -AdpSetProp AlarmDsbl -aALL 

Enable alarm

  MegaCli -AdpSetProp AlarmEnbl -aALL 

Physical drive management

Set state to offline

  MegaCli -PDOffline -PhysDrv [E:S] -aN 

Set state to online

  MegaCli -PDOnline -PhysDrv [E:S] -aN 

Mark as missing

  MegaCli -PDMarkMissing -PhysDrv [E:S] -aN 

Prepare for removal

  MegaCli -PdPrpRmv -PhysDrv [E:S] -aN 

Replace missing drive

  MegaCli -PdReplaceMissing -PhysDrv [E:S] -ArrayN -rowN -aN 

The number N of the array parameter is the Span Reference you get using “MegaCli -CfgDsply -aALL” and the number N of the row parameter is the Physical Disk in that span or array starting with zero (it’s not the physical disk’s slot!).

Rebuild drive

  MegaCli -PDRbld -Start -PhysDrv [E:S] -aN
  MegaCli -PDRbld -Stop -PhysDrv [E:S] -aN
  MegaCli -PDRbld -ShowProg -PhysDrv [E:S] -aN

Clear drive

  MegaCli -PDClear -Start -PhysDrv [E:S] -aN
  MegaCli -PDClear -Stop -PhysDrv [E:S] -aN
  MegaCli -PDClear -ShowProg -PhysDrv [E:S] -aN

Bad to good (or back to good as I like to call it)

  MegaCli -PDMakeGood -PhysDrv[E:S] -aN 

This changes drive in state Unconfigured-Bad to Unconfigured-Good.

Walkthrough: Change/replace a drive

Set the drive offline, if it is not already offline due to an error

  MegaCli -PDOffline -PhysDrv [E:S] -aN 

Mark the drive as missing

  MegaCli -PDMarkMissing -PhysDrv [E:S] -aN 

Prepare drive for removal

  MegaCli -PDPrpRmv -PhysDrv [E:S] -aN 

Change/replace the drive

If you’re using hot spares then the replaced drive should become your new hot spare drive:

  MegaCli -PDHSP -Set -PhysDrv [E:S] -aN

In case you’re not working with hot spares, you must re-add the new drive to your RAID virtual drive and start the rebuilding

  MegaCli -PdReplaceMissing -PhysDrv [E:S] -ArrayN -rowN -aN
  MegaCli -PDRbld -Start -PhysDrv [E:S] -aN
Last modified:: 2016/03/19 16:03