NetApp FC4600 - One CE6998 Controller Tray and Multiple Types of Drive Trays; Guidelines for Connecting FC2610 Drive Trays or FC4600 Drive Trays; Guidelines for Connecting AT2655 Drive Trays

Chapter 4: Drive Connection 103
One CE6998
Controller Tray and
Multiple Types of
Drive Trays
If you are connecting more than one type of drive tray to the CE6998 controller tray,
read these topics before you choose a ing topology:
 Guidelines for Connecting FC2610 Drive Trays or FC4600 Drive Trays
 Guidelines for Connecting AT2655 Drive Trays
Follow these guidelines for connecting multiple types of drive trays to maximize
performan
ce and accessibility.
Guidelines for
Connecting FC2610
Drive Trays or FC4600
Drive Trays
Follow these guidelines for connecting a topology with multiple types of drive trays,
including the FC2610 drive trays or the FC4600 drive trays.
 If your storage array includes FC2610 drive trays or FC4600 drive trays, connect
the FC2610 drive trays or the FC4600 drive trays so that they are the first devices
on the drive channel (after controller A). The first device on the drive channel is
distinguished by the fact that the left ESM of the first device is connected directly
to controller A of the controller tray. Because an optimal redundant cabling
topology requires that the redundant drive channel be connected in the opposite
order, this same device will be the last in the drive channel when connected to
controller B.
 Evenly distribute the FC2610 drive trays or the FC4600 drive trays in pairs or
multiples across redundant pairs of the available drive channels.
 Do not connect a single FC2610 drive tray or a single FC4600 drive tray on a
drive channel
 unless it is the only FC2610 drive tray or FC4600 drive tray in the storage array.
Guidelines for
Conn
ecting AT2655
Drive Trays
Follow these guidelines for connecting a topology with multiple drive tray types,
including AT2655 drive trays.
 If your storage array includes AT2655 drive trays, connect the AT2655 drive
trays so that they are the last devices on the drive channel (from a top-down
connecting perspective).
 Distribute AT2655 drive trays across redundant pairs of drive channels to
equalize the number of drive trays on the available channels.