In a duplex array, all DE120S, DE240S and DE600S drive shelves have two I/O modules (IOMs).
Each IOM has an Attention LED and a Locate LED.
Each IOM has four SAS ports, each with a Port Link LED and a Port Attention LED.
The following illustration shows the IOM LEDs.
Figure 1. IOM LEDs
| LED | Status | Description |
|---|---|---|
| 1 SAS Port Attention | Amber | One or more of the links in the port are not working properly. |
| Off | The port is optimal and no link error has occurred. |
|
| 2 SAS Port Link | Green | The SAS port established a link (with either a controller or another drive shelf). |
| Off | No link is established to another SAS port. |
|
| 3 IOM Attention | Amber | The IOM is not functioning correctly. |
| Off | The IOM is functioning correctly. |
|
| 4 Locate | Blue | There is an active request to physically
locate the drive shelf.
Note: When this LED is activated, the Locate
LED on the left end cap of the drive shelf is also activated. Locate
LEDs turn off automatically after 30 minutes.
|
| Off | There is no active request to locate the drive shelf. |