Connecting Sas Cables To Cascaded Disk Enclosures - HP D2700 User Manual

Connecting SAS cables to cascaded disk enclosures

To cascade additional disk enclosures from the disk enclosure that is connected to the server or
controller enclosure, use standard mini-SAS cables.
As additional disk enclosures are connected to the first disk enclosure, they are assigned a box number.
The assigned box number is displayed on the 7-segment display on the rear of the disk enclosure.
IMPORTANT:
When connecting this disk enclosure in a single-domain environment, only the top I/O module
(I/O module A) in the disk enclosure is supported for use.
The number of supported cascaded disk enclosures varies per disk enclosure model and installation
environment. For more information, see the QuickSpecs for the disk enclosure, controller, or con-
troller enclosure, available on the HP storage website: http://www.hp.com/go/storage.
Observe the following guidelines:
• Only use supported SAS cables with mini-SAS connectors.
• Use provided color clues on the disk enclosure when cabling cascaded disk enclosures; for example,
connect "green" ports to "green" ports (connect I/O module A on one disk enclosure to I/O
module A on the additional disk enclosure).
Note the following when connecting cables:
• P1 on the disk enclosure I/O module is treated as the SAS "in" port.
• P2 on the disk enclosure I/O module is treated as the SAS "out" port.
• In single-domain configurations, one cable path is created between the host, the primary disk en-
closure, and additional cascaded disk enclosures. (Shown)
• In dual-domain configurations, two cable paths are created between the host, the primary disk
enclosure, and additional cascaded disk enclosures.
D2600/D2700 Disk Enclosure User Guide 37