Requirements for adding a disk shelf

What to do if you need more storage

One FC-AL interface can connect up to a maximum of eight daisy-chained disk shelves (four for DS14 disk shelves) per FC-AL adapter. You must add an additional FC-AL adapter to each of your filers for every set of eight disk shelves you add, up to the maximum of FC-AL adapters supported by your filer. See the F800 Series Field Service Guide for FC-AL installation information.

See the NOW Web page at http://now.netapp.com for the maximum number of FC-AL adapters your filer supports.

Required tools and manuals

You must have the following cables and components for each disk shelf added:

Two shelf-to-shelf cables; one each for the Channel A and Channel B loops
Two power cords
Two power outlets, on separate circuits if possible
The F800 Series Field Service Guide for FC-AL installation instructions
The appropriate Fibre Channel disk shelf guide

Restrictions for adding new disk shelves

The following table lists some of the restrictions for adding disk shelves to your cluster. See the DiskShelf14 and DiskShelf14mk2 FC Hardware Guide for a more detailed discussion of restrictions.

If your cluster has...	And you are adding...	Then...
FC7 or FC8 disk shelves	FC9 disk shelves in the same loop	Disk shelf 0 must be an FC7 disk shelf.
FC7, FC8, or FC9 disk shelves	DS14/DS14mk2 FC disk shelves with LRCs	The DS14/DS14mk2 FC must be the last disk shelf in the loop.
DS14/DS14mk2 disk shelves with ESH modules	Hot adding a disk shelf	Disks should be pre-zeroed and used as spares. You can only hot add a DS14/DS14mk2 FC disk shelf to an existing DS14/DS14mk2 FC disk shelf. The DS14/DS14mk2 FC must be the last disk shelf. DS14/DS14mk2 FC disk shelves with ESH modules can only be added to disk shelf loops with ESH modules. If the new disk shelf is a DS14mk2 FC, the speed switch must be set for the appropriate installation.