MegaCli is a command line tool provided by MegaRAID to configure/monitor their hardware RAID controllers. Currently all hard drives on Oak are controlled by a MegaRAID SAS 8708EM2 w/ 256Mb RAM.

MegaCli is available as a RPM for RedHat Linux. For installation on Ubuntu

masker is working on this part

A quick reference sheet can be found at http://tools.rapidsoft.de/perc/perc-cheat-sheet.html

Some commonly used commands:

To see all adapter info:

sudo /opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aALL

To see RAID configuration info of adapter 0:

sudo /opt/MegaRAID/MegaCli/MegaCli64 -CfgDsply -a0

To see enclosure info of adapter 0:

sudo /opt/MegaRAID/MegaCli/MegaCli64 -EncInfo -a0

To see virtual drives info of adapter 0:

sudo /opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -a0

To see a list of physical drives of adapter 0:

sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDList -a0

The example here assumes that the one of the physical hard drive (Enclosure 252, Slot 7, Adapter 0; marked as Physical Disk 3 in Span Reference 0x00) has failed and needs to be replaced.

1. Set the drive offline if it is still online

sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDOffline -PhysDrv [252:7] -a0

2. Mark the drive as missing

sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDMarkMissing -PhysDrv [252:7] -a0

3. Prepare drive for removal

sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDPrpRmv -PhysDrv [252:7] -a0

4. Change/replace the drive

5. Add the physical drive back to the virtual drive

sudo /opt/MegaRAID/MegaCli/MegaCli64 -PdReplaceMissing -PhysDrv [252:7] -Array0 -row3 -a0

6. Start the rebuid

sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -Start -PhysDrv [252:7] -a0

7. To check the rebuild progress

sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ShowProg -PhysDrv [252:7] -a0