Replacing A Power Supply Unit - Hitachi NAS Platform 4000 Series Hardware Reference Manual

6. Replace the bezel .
7. Log in to the server as the root user.
a. Use SSH to connect to the server using the manager account. By default, the
password for the manager account is nasadmin, but this password may have
been changed.
b. To gain access as root, press Ctrl-D to exit the console, then enter su –.
When you are prompted for the root password, enter it for the root user
account. By default, the password for the root account is nasadmin, but this
password may have been changed.
8. Run the script /opt/raid-monitor/bin/recover-replaced-drive.sh, which will partition the
disk appropriately, update the server's internal RAID configuration, and initiate the
rebuilding of the RAID pair.
Rebuilding the RAID pair ensures all data is accurate across both hard disks.
9. After the script has finished, follow these steps:
a. Check the status logging into the NAS OS console (Bali).
b. Issue the command: chassis-drive-status
c. Repeat until all partitions are synchronized.
The RAID system rebuilds the disk as a background operation. The events are
logged as the RAID partitions rebuild and become fully fault tolerant. The rebuild
process can take up to an hour. The status indicator indicates normal operation
(solid or flashing blue) once the RAID configuration has been repaired.
10. Log out.
11. Properly dispose of the used HDD. Do not attempt to re-install or re-use the used
HDD.

Replacing a power supply unit

You can replace a power supply unit (PSU) as a hot-swappable server component. The
server can operate on a single PSU if necessary, making it possible to replace a failed
PSU without shutting down the server. If a PSU fails, it should be replaced as quickly as
possible, because operating on a single PSU means that there is no redundancy in that
area, increasing the risk of an interruption in service to clients.
LED indicators on each PSU indicate the PSU status.
Hitachi NAS Platform and Hitachi Unified Storage Series 4000 Hardware Reference
Caution: Replace only one HDD at a time. If both HDDs require
replacement, perform this procedure for each HDD.
Chapter 5: Replacing server components
Replacing a power supply unit
77