Connecting Enclosures; Connecting Disk Enclosures; U Controller Enclosure Connected To Two Disk Enclosures - Huawei OceanStor V3 Series Quick Installation Manual

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.
 All the EXP ports on the storage system can connect only to the PRI ports. An incorrect connection will cause
a service interruption.
 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.
 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
15
Controller A
Controller B