Replacing An Interface Module - Huawei OceanStor V5 Series Parts Replacement

OceanStor V5 Series
Parts Replacement

7.7 Replacing an Interface Module

This section describes how to replace an interface module.
Impact on the System
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Prerequisites
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Issue 15 (2019-12-30)
During the replacement of a front-end interface module, the system switches
services from ports on this module to ports on another module of the local
controller or the peer controller. If available links are unable to bear the
current service load, host latency increases and the system performance
degrades. If there are no other redundant links, services run on a single link
and the system reliability degrades.
During the replacement of a back-end interface module, the system switches
services to the peer controller. A back-end port has no other redundant links,
and disks in the loop all run with a single path, causing the system reliability
to degrade.
During the replacement of a PCIe interface module or SmartIO interface
module that is used for controller interconnection, the controller on which the
interface module resides goes offline and all services on the controller are
automatically switched to the peer controller. Storage I/Os are suspended for
5 to 10 seconds during the service switchover. The service switchover duration
increases if the service load exceeds load bearing limit of a single controller.
The replacement may fail due to a heavy service load. In addition, the
replacement degrades system performance and reliability. You are advised to
perform interface module replacement during off-peak hours. After the
replacement is complete, the controller on which the interface module resides
will restart and services will be automatically switched back to the controller.
Use SmartKit to replace a PCIe interface module or SmartIO interface module that is
used for controller interconnection.
A spare part is on hand based on the BOM code of the interface module you
want to replace and the type of the spare part is the same as that of the
interface module you want to replace.
A label has been attached to the handle of the spare part.
The interface module that you want to replace has been located.
You can locate a component in either of the following ways:
● Locating a component based on alarms in DeviceManager: On the Alarms and Events
page of DeviceManager, view the help information and determine the ID of the
component to be replaced. Then locate the component at your site based on its ID.
● Locating a component based on the status of its Running/Alarm indicator: For details
about the indicators on different components, see Indicator Introduction of each
Product Description specific to your product model and version.
component in the
Services running on the interface module that you want to replace have been
stopped.
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