Component Description

The system subrack houses a midplane that provides reliable connections for interface modules and distributes power and signals to inner modules.

Appearance

Figure 4-189 shows the appearance of a system subrack.

Figure 4-189 System subrack

An expansion module provides expansion ports for communication between a disk enclosure and a controller enclosure, or between different disk enclosures. Each expansion module provides P0, P1, P2, and P3 expansion ports.

Appearance

Figure 4-190 shows the appearance of an expansion module.

Figure 4-190 Expansion module

Ports

Figure 4-191 and Figure 4-192 show the ports on an expansion module.

Figure 4-191 Ports of an expansion module without a USB port

Figure 4-192 Ports of an expansion module with a USB port

Only serial cables can be inserted into the serial ports. Do not insert network cables into the serial ports.

• The management network port, maintenance network port, and serial port of a smart disk enclosure are reserved and do not need cable connection.
• The USB ports of a smart disk enclosure supply power to the status indicator on the front door of a disk bay only in the scenario where the 4 U controller enclosure is delivered as bay.

Fan modules dissipate heat from the system, allowing the disk enclosure to operate normally at maximum power.

Appearance

Figure 4-193 shows the appearance of a fan module.

Figure 4-193 Fan module

The storage system supports AC and DC power modules. Power modules can ensure that the disk enclosure works correctly in maximum power consumption mode.

Appearance

Figure 4-194 shows the appearance of an AC power module. Figure 4-195 shows the appearance of a DC power module.

Figure 4-194 AC power module

Figure 4-195 DC power module

Disk modules provide storage capacity for a storage system. Disk modules can function as system coffer disks to save service data, system data, and cache data.

Appearance

Figure 4-196 shows the appearance of a disk module.

Figure 4-196 Disk module