EMC VNX Series Hardware Information Manual page 79

LCC
LCC (A and B) mini-SAS connectors (input and output)
◆
LCC (A and B) mini-SAS link LEDs
◆
LCC (A and B) bus ID
◆
LCC (A and B) LEDs (power and fault)
◆
DAE enclosure ID
◆
LCC (A and B) management (RJ-12) connector (not used in VNX7600)
◆
LCC (A and B) latch handle
◆
1 3
2
1 LLC B power supply LED (on, green)
2 LCC B power supply fault LED (on, amber)
3 LCC B AC power supply power in (recessed
plug)
4 LCC B SAS connector link LED (on, blue)
5 LCC B SAS connector (input); labeled with
a double circle (dot) symbol
6 LCC B SAS connector (output); labeled
with a double diamond symbol
Figure 61 Example of 2U, 25 (2.5-inch) disk drive DAE (rear view)
The 6-Gb/s SAS LCC supports, controls, and monitors the DAE, and is the primary
interconnect management element. Each LCC includes connectors for input and output to
downstream devices.
As described previously, the LCCs in a DAE connects to the SPE and other DAEs with
6-Gb/s SAS cables. The cables connect the LCCs in a system in a daisy-chain topology.
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.
4 5
6 7
8 9
B
#
12
7 LCC B bus ID
8 LCC B power and fault LEDs
9 DAE enclosure ID or address
10 LCC B management (RJ-12) connector to
SPS
11 LCC A power supply latch handle
.
12 LCC A right latch handle
.
EMC VNX8000 Hardware Information Guide
Disk-array enclosures
10
A
11
VNX-000280
79