How to show all LSI RAID info with MegaCLI:
Show basic configuration:
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aAll
Detailed RAID card settings:
/opt/MegaRAID/MegaCli/MegaCli64 -AdpAllInfo -a0
Configure Forced Write Bank Cache (To enable cache without BBU, you would need to force it)
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -ForcedWB -Immediate -Lall -aAll
Configure Normal Write Back Cache mode
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -WB -Immediate -Lall -aAll
Configure LSI to use cache even with bad BBU (To enable cache without BBU, you would need to first force the LSI to use cache, then enable it with CachedBadBBU attribute
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -CachedBadBBU -Immediate -Lall -aAll
Configure LSI to disable cache with a badBBU
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -NoCachedBadBBU -Immediate -Lall -aAll
Enable writethrough cache (Cache, that ensures the write to the original data is completed after writing in cache before serving it. No additional benefit in using WT cache, important when data integrity is more important.
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -WT -Immediate -Lall -aAll
Disable LSI Read Ahead Caching
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -NORA -Immediate -Lall -aAll
Enable LSI Read Ahead Caching
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -RA -Immediate -Lall -aAll
Enabled Cached I/O, in writeback mode, the cached stored in LSI cache can be used to serve I/O request first before hitting the backend disk by enabling cached I/O
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -Cached -Immediate -Lall -aAll
Enable Direct I/O
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -Direct -Immediate -Lall -aAll
How to enable Drive Cache, you may enable drive cache that comes with your disk to improvise the cache usage using the RAID command line tool:
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -EnDskCache -Immediate -Lall -aAll
How to disable drive cache
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -DisDskCache -Immediate -Lall -aAll
NCQ is a kind of automatic IO ordering available in RAID cards. To check the status of NCQ, run
/opt/MegaRAID/MegaCli/MegaCli64 -AdpGetProp -NCQDsply -aALL
To Enable NCQ:
/opt/MegaRAID/MegaCli/MegaCli64 -AdpSetProp -NCQEnbl -aALL
To disable NCQ:
/opt/MegaRAID/MegaCli/MegaCli64 -AdpSetProp -NCQDsbl -aALL
To find BBU Information:
/opt/MegaRAID/MegaCli/MegaCli64 -AdpBbuCmd -aAll
To find physical disk information using MegaCLI:
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -a0
/opt/MegaRAID/MegaCli/MegaCli64 -LDSetProp -CachedBadBBU -Immediate -Lall -aAll
