Copyright © 2019, 2021, Hitachi, Ltd.
DKC910I
Hitachi Proprietary
[INST(RM)10-01-10]
Rev.1.1
INST(RM)10-01-10
10. Removing Controller Chassis
NOTICE:
• The removing procedure of Controller Chassis does not include the removal of
Channel Board (CHB)/Disk Board (DKB).
• Perform the removal of CHB/DKB before the removing procedure of Controller
Chassis (see
/
“6. Removing Disk Board (DKB)”
).
• If you perform any of the following operations during the removal of Controller
Chassis, 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
10.1 Estimated Work Time
To estimate the total time required for removing Controller Chassis, sum up relevant items in the table below.
Table 10-1 Estimated Working Hours for Removing Controller Chassis
Process.
Estimated work time
Remarks
When removing two DKCs When removing four DKCs
Micro-program processing
time
10 min
15 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
22 min
44 min
Removal of power cables
and LAN cables
Component removal time
76 min
152 min
Removal of CTLs and HIEs
from Controller Chassis, and
removal of DIMMs, CFMs,
BKNFs, and batteries from
CTLs
Chassis removal time
12 min
24 min
