Copyright © 2019, 2021, Hitachi, Ltd.
DKC910I
Hitachi Proprietary
[INST(RM)11-01-10]
Rev.2
INST(RM)11-01-10
11. Removing Controller Boards
NOTICE:
When removing Controller Boards, you need to connect the LAN cable between
the Maintenance LAN port on the LAN board 1 in DKC-0 and the Maintenance LAN
port on the LAN board 2 in DKC-1. After the removal of Controller Boards is started,
until the connection of the LAN cable is complete, the following information might be
missing:
• Monitoring information (Performance Monitor and monitoring on SVP)
• Log information (SSB log, Reset log, HTP log, Power Event log, Incident log, and
Detail log)
• If you perform any of the following operations during the removal of Controller
Board, a serious error such as system down and data loss might be caused. Never
do the following:
- Removing a CTL
- Changing X-path cable connections
-
Turing off PDU breakers
11.1 Estimated Work Time
To estimate the total time required for removing Controller Boards, sum up relevant items in the table below.
Table 11-1 Estimated Working Hours for Removing Controller Boards
Process
Estimated work time
Remarks
Micro-program processing
time
10 min
The work time depends on I/O load. When I/O load is
very high, it might take up to about 4 hours.
Cable removal time
17 min
Removal of X-path cables, LAN cables, and SAS cables
(NVMe cables)
Component removal time
38 min
Removal of CTLs, HIEs, CHBs, and DKBs (DKBNs)
from Controller Chassis in the rack, and removal of
DIMMs, CFMs, BKMFs, and batteries from Controller
Boards.
