DELL PERC5/i Integrated (LSI Logic MegaRAID) – Emergency Cheat Sheet Print

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DELL PERC5/i Integrated (LSI Logic MegaRAID) – Emergency Cheat Sheet –

Requirements and general information

MegaCli is available for Linux, DOS, Windows, Netware and Solaris. 
You can get it from LSI’s website (search for MegaRAID SAS) or download it here:

Inside the 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.


MegaCli conventions

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 -a(where 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 is the enclosure device ID in which the drive resides and 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 (see 5).

  • Virtual drive parameter -Lx

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


Gather information

  • 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


Virtual drive management

  • Create RAID 0, 1, 5 drive

    MegaCli -CfgLdAdd -r(0|1|5) [E:S, E:S, ...] -aN

  • Create RAID 10 drive

    MegaCli -CfgSpanAdd -r10 -Array0[E:S,E:S] -Array1[E:S,E:S] -aN

  • Remove drive

    MegaCli -CfgLdDel -Lx -aN


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 of the array parameter is the Span Reference you get using „MegaCli -CfgDsply -aALL“ and the number of the row parameter is the Physical Disk in that span or array starting with zero (it’snot 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

    MegaCli -PDMakeGood -PhysDrv[E:S] -aN 
    Changes drive in state Unconfigured-Bad to Unconfigured-Good.


Hot spare management

  • Set global hot spare

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

  • Remove hot spare

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

  • Set dedicated hot spare

    MegaCli -PDHSP -Set -Dedicated -ArrayN,M,... -PhysDrv [E:S] -aN


Walkthrough: Change/replace a drive


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

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

  2. Mark the drive as missing

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

  3. Prepare drive for removal

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

  4. Change/replace the drive
  5. If you’re using hot spares then the replaced drive should become your new hot spare drive

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

  6. 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

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