Megacli Command

MegaCli -CfgDsply -aALL

To check all Config,Physical,Vitrual disk status.

MegaCli -PDList -aALL

To check all physical disk status.

MegaCli -LDinfo -Lall -aALL

To show and check all virtual disk

MegaCli -PDRbld -ProgDsply -PhysDrv [1:4] -aALL

To show the rebuild status of Physical disk 1:4

MegaCli -PDOffline -PhysDrv [1:4] -a0
MegaCli -PDOnline -PhysDrv [1:4] -a0

To make physical disk online / offline

MegaCli -PDHSP -Rmv -PhysDrv[1:5] -a0

To remove hotspare for physical disk 1:5 for all array

MegaCli -PDHSP -Set [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0
MegaCli -PDHSP -Set [-Dedicated [-Array1]] [-EnclAffinity] [-nonRevertible] -PhysDrv[1:5] -a0

To make hotspare for all array or specific array

MegaCli -LDRecon -Start -r5 -Add -PhysDrv[1:4] -L1 -a0

To add new raid 5 member online for Physical disk 1:4. It is required reboot to view the size changes. (df-h)

MegaCli -LDInit -ShowProg -LALL -aALL
MegaCli -LDInit -ProgDsply -LALL -aALL

To show the progress of array initialization

MegaCli -LDBI -ShowProg -LALL -aALL
MegaCli -LDBI -ProgDsply -LALL -aALL

To show the progress of background mode of array initialization

MegaCli -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -a0 MegaCli -CfgLdAdd -r5 [1:2,1:3,1:4] WB Direct -Hsp[1:5] -a0

Create array raid5 with 3 physical disk 1:2,1:3,1:4 (with hotstapre or not)

MegaCli -CfgLdDel -L1 -a0

Delete array 1

WT    (Write through
WB    (Write back)
NORA  (No read ahead)
RA    (Read ahead)
ADRA  (Adaptive read ahead)
Cached
Direct

 
sample :
MegaCli -LDSetProp WT|WB|NORA|RA|ADRA -L0 -a0

 
or

MegaCli -LDSetProp -Cached|-Direct -L0 -a0

 
or

enable / disable disk cache

MegaCli -LDSetProp -EnDskCache|-DisDskCache -L0 -a0

enable / disable disk cache or set cache property/policy of array

MegaCli -LDGetProp -Cache -LALL -aALL

To show the cache property/policy for all array

MegaCli -AdpAllInfo -aAll View information about the battery backup-up unit state MegaCli -AdpBbuCmd -aAll View information about virtual disks Useful for checking RAID level, stripe size, cache policy and RAID state: MegaCli -LDInfo -Lall -aALL View information about physical drives MegaCli -PDList -aALL To see information about the patrol read state and the delay between patrol read runs: MegaCli -AdpPR -Info -aALL To find out the current patrol read rate, execute MegaCli -AdpGetProp PatrolReadRate -aALL To reduce patrol read resource usage to 2% in order to minimize the performance impact: MegaCli -AdpSetProp PatrolReadRate 2 -aALL To disable automatic patrol read: MegaCli -AdpPR -Dsbl -aALL To start a manual patrol read scan: MegaCli -AdpPR -Start -aALL To stop a patrol read scan: MegaCli -AdpPR -Stop -aALL If your system is not connected to a UPS, you should disable the physical disk cache in order to prevent data loss. MegaCli -LDGetProp EnDskCache -LAll -aALL To enable it (only do this if you have a UPS and redundant power supplies): MegaCli -LDGetProp DisDskCache -LAll -aALL Detail about disks: MegaCli -ShowSummary -aALL Check patrol read warnings: MegaCli -AdpEventLog -GetSinceReboot -warning -fatal -a0