Huawei OceanStor 5110 V5 Quick Installation Manual page 15

3c Connecting enclosures
Connect disk enclosures according to the following rules:
 SAS expansion cables must be naturally bent, and a minimum of 97 mm (3.82 inches) clearance must be
reserved in front of each enclosure for winding cables.
The number of disk enclosures connected to the expansion ports on the controller enclosure cannot exceed
the upper limit.
Connect the expansion interface module of controller A to expansion module A of a disk enclosure, and
connect the expansion interface module of controller B to expansion module B of a disk enclosure.
When connecting cables between two disk enclosures, connect the P0 port on one disk enclosure to the P1
port on the other disk enclosure. When connecting a disk enclosure to a controller enclosure, connect the
onboard expansion port or the port on the expansion interface module of the controller enclosure to the P0
port on the disk enclosure.
 For a storage system with two or more disk enclosures, set up multiple loops and evenly allocate those disk
enclosures to the loops.
 All disk enclosures in the same loop are connected by two independent links. To be more specific, the
forward and backward connection mode is used for optimal network reliability.
Scenario 1 Connecting disk enclosures
2 U controller enclosure connected to two disk enclosures
Controller enclosure
Disk
enclosure 2
Expansion
module B
Expansion
module A
Disk
Enclosure 1
Controller A
Controller B
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