Huawei OceanStor Dorado V3 Series Quick Installation Manual page 11

Connecting NVMe disk enclosures to Dorado5000 V3 (NVMe) (Applicable only to V300R002C10 and later)
 Dorado5000 V3 (NVMe) supports only NVMe disk enclosures.
 A PCIe port can only connect to one disk enclosure.
 Each controller connects to port P0 of a disk enclosure via one cable. That is, each controller enclosure
connects to a disk enclosure via two cables.
 The following shows the appearance of the PCIe cable (mini SAS HD 8X). It has two connectors at each end.
PCIe cable (mini SAS HD 8X)
Controller enclosure
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