Hitachi DKC910I - 10 Removing Controller Chassis; Estimated Work Time

Copyright © 2019, 2021, Hitachi, Ltd.
DKC910IHitachi 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 “5. Removing Channel Boards”/“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 o󰀨 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