How to Change a Degraded Drive with tw_cli commandline?

A failed RAID set looks like this:

dev306:~# /opt/3Ware/bin/tw_cli
//dev306> info c0

Unit  UnitType  Status         %Cmpl  Stripe  Size(GB)  Cache  AVerify  IgnECC
------------------------------------------------------------------------------
u0    RAID-5    DEGRADED       -      256K    1117.56   ON     OFF      OFF   

Port   Status           Unit   Size        Blocks        Serial
---------------------------------------------------------------
p0     OK               u0     372.61 GB   781422768     3PM0Q56Z   
p1     OK               u0     372.61 GB   781422768     3PM0Q3YY   
p2     OK               u0     372.61 GB   781422768     3PM0PFT7   
p3     DEGRADED         u0     372.61 GB   781422768     3PM0Q3B7 

 

 

Now I will remove this bad disk from the RAID set:

//dev306> maint remove c0 p3
Exporting port /c0/p3 ... Done.

 

 

With the bad disk identified and replaced, now I need to go back into the 3Ware CLI and find the new disk, then tell the array to start rebuilding.

dev306:~# /opt/3Ware/bin/tw_cli
//dev306> maint rescan
Rescanning controller /c0 for units and drives ...Done.
Found the following unit(s): [none].
Found the following drive(s): [/c0/p3].


//dev306> maint rebuild c0 u0 p3
Sending rebuild start request to /c0/u0 on 1 disk(s) [3] ... Done.

//dev306> info c0

Unit  UnitType  Status         %Cmpl  Stripe  Size(GB)  Cache  AVerify  IgnECC
------------------------------------------------------------------------------
u0    RAID-5    REBUILDING     0      256K    1117.56   ON     OFF      OFF   

Port   Status           Unit   Size        Blocks        Serial
---------------------------------------------------------------
p0     OK               u0     372.61 GB   781422768     3PM0Q56Z   
p1     OK               u0     372.61 GB   781422768     3PM0Q3YY   
p2     OK               u0     372.61 GB   781422768     3PM0PFT7   
p3     DEGRADED         u0     372.61 GB   781422768     3PM0Q3B7