Hdisk removal for MegaCli

In the event that you need to replace a hdisk (be in in failed/degraded/online state) in MegaRaid configuration, this is the steps:

1. Find out the drive layout 

# MegaCli -pdlist -a0 

the command will informed the "Enclosure Device ID" and  "Slot Number" , to be used on subsequent command

2. Set alarm to silence and turn off any locate  (im having 6 drive as example below)

# MegaCli -AdpSetProp -AlarmSilence -aALL

# MegaCli -PdLocate -stop -physdrv[252:0] -aALL

# MegaCli -PdLocate -stop -physdrv[252:1] -aALL

# MegaCli -PdLocate -stop -physdrv[252:2] -aALL

# MegaCli -PdLocate -stop -physdrv[252:3] -aALL

# MegaCli -PdLocate -stop -physdrv[252:4] -aALL

# MegaCli -PdLocate -stop -physdrv[252:5] -aALL

3. Turn on locate for the drive that you want to replace (sometimes this does not turn on light physically)

# MegaCli -PdLocate -start -PhysDrv [252:3] -aALL

4. Set it offline

# MegaCli -PDOffline -PhysDrv [252:3] -a0

At this point, if you need to "rebuild" using the same disk, run the following. The command will trigger rebuild process immediately as the disk become "discovered"

# MegaCli -PDMarkMissing -PhysDrv [252:3] -a0 

5. Monitor the progress 

# MegaCli -pdrbld -showprog -physdrv [252:3] -a0

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