Chapter 7 Administrative Procedures
© 2017 Harmonic Inc. All rights reserved. 204 Harmonic MediaGrid Release 4.1
Drive Capacity Expansion in a Harmonic MediaGrid RAID System
When the confirmation message appears, click OK.
Within a short while, the
Write Disable and Evacuate buttons change to Write Enable and
Cancel Evacuation. The CS Status field changes to “Evacuating”, which also appears on the
ContentServer/ContentStore
Properties page and the Servers & Switches page).
Lastly, after a short delay, SystemManager shows an estimated time of completion. This
estimate is based on the rate at which the Harmonic MediaGrid has copied slices so far, and
the number of slices remaining, without regard to slice sizes. This estimate will change with
increased/decreased load on the system or network, or with significant variation in the size of
slices to be moved.
5. Monitor the progress of the evacuation.
If the evacuation appears to be stuck at 99% or 100%, this may mean the shelf has not
yet reported that it is done deleting the last few slices that were copied to other shelves.
Wait a few minutes for the CS Status to update.
When evacuation is complete, the CS Status changes to “Evacuated” and the following
message appears:
Data migration for <component name> has completed. The component
may be retired.
NOTE: After a shelf is evacuated, the value for “Free Space (%)” may be slightly less than 100. This is
expected following a successful evacuation.
If an error occurs, refer to Possible Errors During Shelf Evacuation and follow the instructions
for troubleshooting the particular error that occurred.
If necessary, you may cancel the evacuation by clicking Cancel Evacuation. Note that
canceling an evacuation does not return the data that has already been transferred back
to the original shelf.
Following a cancellation, you must return the shelf to normal service (see Step 10) and
rebalance the ContentServers and ContentStores in the cluster (see Step 12).
Proceed to Step 6 only after the evacuation has successfully completed.
6. Navigate to the
Properties page and click Wink On to identify the physical ContentServer or
ContentStore that was evacuated.
NOTE: For the ContentStore 5840, be sure to navigate to the correct Properties page for the shelf
(drawer) that was evacuated.
7. From the
RAID Sets section of the Properties page, destroy all of the RAID sets for the shelf
that was evacuated.
For instructions, refer to “Destroying a RAID Set” in the Harmonic SystemManager User
Guide.
8. For the shelf that was evacuated, replace the original drives with higher capacity drives.
For instructions, refer to “Replacing a Hard Drive” in Chapter 1, “Replacing a ContentServer
and Related Components”, or in Chapter 2, “Replacing a ContentStore and Related
Components”, in the Harmonic MediaGrid Component Replacement Guide.
9. Using SystemManager, create new RAID sets for the shelf that was expanded.
For instructions, refer to “Creating a RAID Set with Auto Create” or “Creating a RAID Set” in
the Harmonic SystemManager User Guide.
10. From the
Shelf Evacuation Control/Status page in SystemManager, click Write Enable for the
shelf that was evacuated to return the shelf to normal service.
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