Replacing VIOS disk

I have two mirrored drives in this VIOS partition. One is failed. Called
the CE and they're scrambling for the part (although it automatically
called them FRIDAY!).
They "think" it can be replaced hot. (Not getting a warm fuzzy here.)
They think it could really help replacement time if the mirrored chain was
broken first and some other jargon that flew by. I normally deal more
with mirroring.
They said to open a software ticket and see if they can help me get
through that before they get here.

Waiting on software call back.
Anyone have some doc links on this?

I replace pmr and serial numbers with pound signs.

Field Name Value

Problem number 90
PMH number #####,###,000
Reference code 2D35-FFF4
System reference code 2D35-FFF4
Status Open
First reported time 11/21/2014 20:46
Last reported time 11/21/2014 20:46
Primary data event timestamp 11/21/2014 19:38
Reporting Primary Unit Name Server-8286-41A-SN21#####
Reporting Primary Unit MTMS 8286-41A/21#####
Failing Unit MTMS 8286-41A/21#####
Serviceable event text Device problem.
Event severity 0
Reporting partition ID 1
Reporting partition name vios21
Partition host name vios21
Partition OS type AIX
Notification type Call Home Required
Notification status Opened
Notification status Opened
Duplicate count 0
Primary Analyzing Management Console MTMS 7042-CR8/21#####


Select Class FRU description Location code Previously
replaced Replaced timestamp

Part number Disk Drive (DASD) U78C9.001.WZS00UA-P2-D7
No


Field Name Value

Part number 00E9912
Location code U78C9.001.WZS00UA-P2-D7
Serial number 44B0RP92



Rob Berendt