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Chapter 1 Tray Overviews 7
■ Two data host connectors per controller that can support either a fiber-optic
interface or a copper interface with 1, 2, or 4 Gb/s data host connection speed
■ One drive expansion tray Serial Attached SCSI (SAS) connector with 3 Gb/s drive
expansion tray connection speed
■ 512-MB or 1-GB mirrored cache
■ Maximum connection of 36 disk drives (one controller tray and two drive
expansion trays)
When fiber-optic cables are used to connect to the data host, a Small Form-factor
Pluggable (SFP) transceiver is required to make the connection.
FIGURE 1-6 Sun StorageTek 2540 Array Connectors
SFP Transceivers
You can connect the Sun StorageTek 2540 Array to either copper host interface cables
or fiber-optic host interface cables. If you use fiber-optic cables, you must install an
SFP transceiver in each interface connector on the controller where a fiber-optic cable
is to be installed. The SFP transceiver is required to translate the optical signals from
the fiber-optic cable into digital signals for the controller.
Note – The SFP transceiver shown might look different from those that are shipped
with your controller tray. The difference does not affect transceiver performance.
1. Drive Expansion Tray Connector
(SAS Out)
2. Ethernet Management Host
Connector
3. Fibre Channel Data Host
Connectors or Copper Data Host
Connectors
4. RS-232 Connector (Diagnostics
Port)
5. Not Used