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

===== Installation =====
MegaCli is available as a RPM for RedHat Linux from [[http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/value_line/megaraid_sas_8708em2/index.html|LSI MegaRAID 8708EM2]]. The file name is: **4.00.11_Linux_MegaCLI.zip**

For installation on Ubuntu, first we need to install ''alien'' for package format conversion:
<code bash>
$ sudo apt-get install alien
</code>

There are two possible ways to perform the actual installation:

==== 1. masker ====
<code bash>
$ unzip 4.00.11_Linux_MegaCLI.zip
Archive:  4.00.11_Linux_MegaCLI.zip
 extracting: MegaCliLin.zip          
  inflating: 4.00.11_Linux_MegaCLI.txt 
$ unzip MegaCliLin.zip
Archive:  MegaCliLin.zip
  inflating: MegaCli-4.00.11-1.i386.rpm  
$ alien -g MegaCli-4.00.11-1.i386.rpm
....
Directories MegaCli-4.00.11 and MegaCli-4.00.11.orig prepared.
$ mv MegaCli-4.00.11/debian MegaCli-4.00.11/DEBIAN
$ vi MegaCli-4.00.11/DEBIAN control
</code>

Change ** Orignal "control" **
<file>
Source: megacli
Section: alien
Priority: extra
Maintainer: MyName

Package: megacli
Architecture: i386
Depends: ${shlibs:Depends}
Description: MegaCli SAS RAID Management Utility.
 MegaCli is used to manage SAS RAID controllers.
 .
 (Converted from a rpm package by alien version 8.79.)
</file>

to ** Modified "control" **
<file>
Source: megacli
Section: alien
Priority: extra
Maintainer: MyName
Package: megacli
Architecture: amd64
Depends: 
Description: MegaCli SAS RAID Management Utility. MegaCli is used to manage SAS RAID controllers.
Version: 4.00.11
</code>
(including blank line)
<code>
$ dpkg -b MegaCli-4.00.11
$ sudo dpkg -i MegaCli-4.00.11.deb
</file>

==== 2. chkuo ====
<code bash>
$ sudo alien --to-tgz MegaCli-4.00.11-1.i386.rpm 
$ tar -xvfz MegaCli-4.00.11.tgz 
</code>

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

Some commonly used commands:

==== Get Info ====
To see all adapter info:
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -aALL
</code>

To see RAID configuration info of adapter 0:
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -CfgDsply -a0
</code>

To see enclosure info of adapter 0:
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -EncInfo -a0
</code>

To see virtual drives info of adapter 0:
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -a0
</code>


To see a list of physical drives of adapter 0:
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDList -a0
</code>


==== To Replace a Hard Drive ====
**WARNING: The following procedure has not been verified yet!!**

The example here assumes that the one of the physical hard drive (Enclosure 252, Slot 6, Adapter 0; marked as Physical Disk 2 in Span Reference 0x00) has failed and needs to be replaced.

1. Set the drive offline if it is still online
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDOffline -PhysDrv [252:6] -a0
</code>

2. Mark the drive as missing
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDMarkMissing -PhysDrv [252:6] -a0
</code>

3. Prepare drive for removal
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDPrpRmv -PhysDrv [252:6] -a0
</code>

4. Replace the failed hard drive

5. If the replaced hard drive is listed as ''Unconfigured(bad)'', change the state
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDMakeGood -PhysDrv [252:6] -a0
</code>

6. Add the physical drive back to the virtual drive
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PdReplaceMissing -PhysDrv [252:6] -Array0 -row2 -a0
</code>

7. Start the rebuid
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -Start -PhysDrv [252:6] -a0
</code>

8. Check the rebuild progress
<code bash>
sudo /opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ShowProg -PhysDrv [252:6] -a0
</code>