Network Appliance DiskShelf 14mk2 FC, Hardware And Service Manual

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68 Hot-adding a DS14/DS14mk2 FC/DS14mk4 FC
Hot-adding a DS14/DS14mk2 FC/DS14mk4 FC
About this section This section provides information about how to hot-add a DS14/DS14mk2 FC/
DS14mk4 FC to an existing system. It also tabulates the error messages that
appear on your storage controller console if the attempt at hot-adding was
unsuccessful.
NetApp recommends that you hot-add one disk shelf at a time.
Caution
Failure to follow this recommendation may cause the loop to crash.
Requirements for
hot-adding To hot-add a DS14/DS14mk2 FC/DS14mk4 FC, the following requirements
must be met.
Error messages The following error messages appear on your storage controller console if your
attempt at hot-adding the DS14/DS14mk2 FC is unsuccessful.
If the disk shelf
being hot-added...
Then...
Has LRC modules The disk shelves in the existing loop must have a
DS14/DS14mk2 FC disk shelf with LRCs as the last
shelf.
Has ESH/ESH2/
ESH4 modules
The disk shelves in the existing loop must have only
DS14/DS14mk2 FC/DS14mk4 FC disk shelves with
ESH/ESH2/ESH4 modules in the loop.
Error message Explanation
Speed mismatch
termination
The ESH modules on the disk shelf detected a speed
mismatch between the preceding disk shelf and this disk
shelf and is reporting them as automatic terminate errors.