Chapter 2: Product Compatibility 33
Drive Channel
Information by
Model
The following table lists the specifications and restrictions that affect connection
between controller trays and drive trays or between controller-drive trays and drive
trays. Make sure that the topology you plan for your drive trays is compatible with
these specifications and restrictions.
NOTE When you mix different types of drive trays, you must consider the total
number of drives that are available in the final configuration of the storage array. Your
configuration must meet both the limit on the total number of drives and the limits on
the number of s of a given model.
Table 2 Drive Channel Information for Controller Trays and Controller-Drive
Trays
Product
Drive Port
Speeds
Maximum
Number of
Drives
Supported
Drive
Trays
Cable Type Notes
CE7922 controller
tray
2 Gb/s or
4 Gb/s
480 DE6900
FC4600
Copper FC
cables or
fiber-optic FC
cables
The 480 maximum number of
drivedrives is possible only for a
configuration with eight DE6900 drive
trays with no other types of drive trays.
There is a limit of two expansion drive
trays for each redundant pair of loops.
Up to 448 drives are possible when
FC4600 drive trays are used
exclusively. There is a limit of seven
expansion drive trays for each
redundant pair of loops.
Mixing drive types is not supported.
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