Controller board

Number	Item	Description
1	Cache flash memory	NA
2	Channel board	Channel board component
3	Uninterruptible power supply port	NA
4	LAN-RST switch	Resets ESM. Use only when instructed by Hitachi Vantara support.
5	LAN port	LAN1: Maintenance LAN port (left) LAN2: User LAN port (right)

Number	Item	Description
1	ALARM LED (for CFM )	Red: Cache flash memory can be removed.
2	CTL ALM LED	Red: Controller can be removed. Failure of the controller's power supply unit. Amber: LAN reset switch was pressed.
3	LAN-RST switch	Resets ESM. Use only when instructed by Hitachi Vantara support.
4	LOCATE LED	Blue: An LED to specify the location of the controller board on the rear of the chassis.
5	ACT LED	Amber: Data is being transferred.
6	SPEED LED	Green On: Link speed is 1 Gbps Off: Link speed is 10 Mbps/100 Mbps
7	ESM status	Green On: ESM is on standby. Green blinking: ESM is active. Amber: The ESM has started the boot loader. Fast blink: The ESM is in phase 2 of the boot loader. Slow blink: The ESM OS is booting. Off: ESM is shutdown.
8	BACKUP STS LED	Green: Restoration in progress following power outage Fast Blink: Restoring. Slow Blink: Restoring or sequential shutdown in progress.