Dell recommends that you label all SAS cable
connectors with an identifying sticker or tag for easy identification
and troubleshooting purposes.
The cabling configurations provide high availability
between servers and storage enclosures where each server has two redundant
SAS paths to each enclosure and to each disk. Each path must go through
one of the two EMM units in each enclosure. In some instances, the
dual path between each server and each enclosure is accomplished by
linking two enclosures together.
After attaching each SAS cable, make sure that each
cable is seated firmly in to the SAS ports by gently pulling outwardly
on the cable. When you turn on the storage enclosure, the green LED
near each SAS port glows indicating that a SAS connection is started.