76
One CE7922
Controller Tray or
CE7900 Controller
Tray and Nine to 16
FC4600 Drive Trays
When the number of drive trays exceeds eight, the cabling pattern changes
significantly. From this point, you begin to use the “A” ports on the ESMs, and
connect the drive trays beyond the eighth one to another drive tray.
If you add drive trays to an existing configuration so that the total number of drive
trays attached to one controller tray increases from eight or fewer to a total of more
than eight, you must re-connect some of the drive trays that were previously
connected to that controller tray. For each new drive tray beyond the eighth one, in
addition to adding two cables to attach the new drive tray, you must move one cable
on a previously installed drive tray.
The following figure and table show an example where a ninth and tenth drive tray
have been added to a controller tray that previously had eight drive trays. Cable 1
remains the same as in the previous configuration. The end of cable 2 that was
previously connected to drive tray 1 now connects to drive tray 9. Cables 17 and 18
are added between drive tray 1 and drive tray 9 so that they now connect in series.
Drive tray 10 is added using connections to drive tray 2 that follow the pattern of the
connections between drive tray 1 and drive tray 9. Drive tray 3 is not connected to
another drive tray, so its connection remains the same (as it does for drive trays 4 to 8,
which do not appear in the table).
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