Huawei OceanStor Dorado2100 G2 Quick Installation Manual page 7

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Connecting Disk Enclosures to the Controller Enclosure
 All EXP expansion ports on the storage devices only connect to the PRI expansion ports.
 The expansion ports on controller A must connect to the PRI expansion ports on expansion module
A of the disk enclosure; the expansion ports on controller B must connect to the PRI expansion ports
on expansion module B of the disk enclosure.
 Each 6 Gb SAS expansion port on the controller enclosure can be connected to a maximum of three
disk enclosures, each of which supports up to 25 disks.
 The bend radius of the mini SAS cable should be larger than 150 mm (5.91 inches).
 If the controller enclosure is connected to one or two disk enclosures: Expansion module on
controller A must connect to expansion module A on each disk enclosure. Expansion module on
controller B must connect to expansion module B on each disk enclosure.
 If the controller enclosure is connected to three disk enclosures: The third disk enclosure is directly
connected to the first or second disk enclosure.
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