ledctl

Turn on Locate LED for devices

$ sudo ledctl locate=[/dev/sda,/dev/sdb]

$ sudo ledctl locate_off=[/dev/sda,/dev/sdb]

$ sudo ledctl off=[/dev/sda,/dev/sdb]

$ sudo ledctl normal=[/dev/sda,/dev/sdb]

ledctl [options] pattern=devicelist_

ledctl controls enclosure LEDs for Intel RAID controllers and storage systems. It allows physical identification of disks by blinking the Locate LED, and manages status indicators for disk states.
This is particularly useful in data centers with many disks, allowing administrators to physically locate specific drives that need attention, replacement, or are part of a rebuild operation.

locate=DEVICES

Turn on Locate LED (blue blinking)

Turn off Locate LED

Turn off Status and Failure LEDs

Turn off all LEDs, return to normal state

Set rebuild pattern (used during RAID rebuild)

Set failure pattern (solid red)

Requires Intel hardware with LED support (AHCI, ISCI, VMD enclosures). Needs root privileges. Not all enclosures support all LED patterns.

ledctl is part of the ledmon package, developed by Intel for managing storage enclosure LEDs on their RAID and storage hardware platforms.

ledmon(8), mdadm(8), smartctl(8)