14. Power on the EXP810 storage expansion enclosure and add it to the DS4000
controller redundant drive channel/loop pair one at a time. See information
about adding expansion enclosures containing new hard drives in the
DS4000/DS5000 Hard Drive and Storage Expansion Enclosure Installation and
Migration Guide.
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IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User's and Maintenance Guide