EMC® VNX5300™ Hardware Information Guide
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EMC® VNX5300™ Hardware Information Guide
Internally, each DAE LCC connects to the drives in its enclosure in a point-to-point
fashion through a switch. The LCC independently receives and electrically terminates
incoming signals. For traffic from the system’s storage processors, the LCC switch
passes the signal from the input port to the drive being accessed; the switch then
forwards the drive output signal to the port.
Note: If the target drive is not in the LCC’s enclosure, the switch passes the input signal
directly to the output port.
Each LCC independently monitors the environmental status of the entire enclosure,
using a microcomputer-controlled monitor program. The monitor communicates the
status to the storage processor, which polls disk enclosure status. LCC firmware also
controls the SAS PHYs and the disk-module status LEDs.
As shown in Figure 64 on page 67, an enclosure ID
19
indicator is located on each LCC.
Each LCC also includes a bus (back-end port) identification indicator. The SP
initializes the bus ID when the operating system is loaded.
2U, 25 (2.5-inch) DAE AC power supply/cooling module
Figure 65 shows an example of the 2U, 25 (2.5-inch) DAE AC power supply/cooling
module with a power in recessed connector (plug) and status LEDs.
Figure 65 Example of a 2U, 25 (2.5-inch) DAE AC power supply/cooling module (power in)
recessed connector (plug) and status LEDs
19. The enclosure ID is sometimes referred to as the enclosure address (EA).
Latch handle
Power fault LED Power on LED
Power supply in
VNX-000279
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