Use the following procedure to cable disk shelves together using copper SAS cables. Active optical cables (AOCs) are allowed for DE3-24 disk shelves in special circumstances as indicated here.
For DE3-24 disk shelves within the same cabinet, use 1-meter (3.28-foot) SAS-3 cables; for DE2-24 and Sun Disk Shelves within the same cabinet use 2-meter (6.56-foot) SAS-2 cables.
For DE3-24 disk shelf cabling extending between adjacent cabinets, use 3-meter (9.84-foot) SAS-3 cables.
For DE3-24 disk shelf cabling extending between two adjacent cabinets, use 6-meter (19.68-foot) copper, or 6-meter AOC, or 20-meter (65.62-foot) AOC SAS-3 cables; only one pair of 6-meter or 20-meter SAS-3 cables is allowed per chain.
For DE2-24 and Sun Disk Shelf cabling extending between adjacent cabinets, use 3-meter (9.84-foot) SAS-2 cables.
Use these guidelines for creating the loops:
1-meter cable length - 2 loops
2-meter cable length - 3 loops
3-meter cable length - 4 loops
The length between the cable tie and the cable ends should be approximately 0.58 meters (23 inches).
The cable tie should face the rear of the rack to maximize the cable length.
Refer to the appropriate cabling diagram to identify the disk shelf port. When attaching a cable to a DEx-24 disk shelf, position the blue release tab correctly for the disk shelf type and I/O Module, and ensure that the cable connector latches engage in the port.
Attaching a Mini-SAS HD Cable to a DE3-24P Disk Shelf
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Attaching a Mini-SAS HD Cable to a DE3-24C Disk Shelf
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Attaching a Mini-SAS Cable to a DE2-24P Disk Shelf
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Attaching a Mini-SAS Cable to a DE2-24C Disk Shelf
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Cabling 2U Disk Shelves Together (DE3-24P shown)
Cabling 2U Disk Shelves Together (DE2-24P shown)
Cabling 4U Disk Shelves Together (DE3-24C shown)
Cabling 4U Disk Shelves Together (DE2-24C shown)
Keep approximately 20.32 centimeters (8 inches) between cable tie-offs on a side.