Huawei OceanStor Dorado V3 Series Parts Replacement page 113

OceanStor Dorado V3 Series
Parts Replacement
Impact on the System
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Prerequisites
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Issue 05 (2019-01-30)
During the replacement of a controller, all services on the to-be-replaced controller are
switched to the peer-end controller, with a 5s to 10s storage I/O suspension. The service
switchover duration increases and controller replacement may fail if the service load is
heavy.
During the replacement of a controller, system performance and reliability are
compromised. Therefore, replace a controller during off-peak hours.
If the controller that you want to replace is processing services, ensure that its CPU
usage does not exceed 40% before replacing it.
NOTE
If you use the FRU tool to replace a controller, the tool will check this item automatically. To manually
check this item, run the show controller general command. For details, see the Command Reference
specific to your product.
The spare part is ready.
The controller that you want to replace has been located.
NOTE
You can locate a component in either of the following ways:
l Locating a component based on alarms in DeviceManager: On the Alarms and Events page of
DeviceManager, view the help information and locate the component to be replaced.
l Locating a component based on the status of its alarm indicator: For details about the indicators on
different components, see indicator introduction in the Product Description specific to your product.
The cable connection positions of the controller that you want to replace are labeled on
the cables.
After a user manually replaces the public/private key pairs of ibc_os_hs, the public/
private key pairs of all other functional controllers are initialized before controller
replacement.
NOTE
To initialize the public/private key pairs, log in to the serial port of the controller enclosure using user
account _super_admin (the default password is Admin@revive) and run the initibckey command.
If the storage system of the current version allows SSH port IDs to be configured, the
SSH port ID of each controller in the storage system is the default value 22.
NOTE
Run show system server_port server_name=SSH to check whether the SSH port ID is 22. If the port
ID is not 22, run change system server_port server_name=SSH port_num=22 to change it to 22.
If the controller to be replaced is in minisystem state (After you log in to the CLI of the
controller, Storage: minisystem> is displayed), run the showbootmode command to
check whether the boot mode of the storage system is normal.
– If the command output is boot -> boot_osp, the boot mode is normal. Find the fault
reason and rectify the fault before replacing the controller.
– If the command output is boot -> boot_rescue, the boot mode is abnormal. Run the
resumebootmode command to restore the boot mode to normal before replacing
the controller.
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5 Replacing FRUs
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