Find disk with Megacli

Find disk with megacli tool with SN of disk

megacli -PDList -aALL | grep -B 27 -A 18 'SN of disk'

Start lights
megacli -pdlocate -start -physdrv[enclosure:slot] -a0
megacli -pdlocate -stop -physdrv[enclosure:slot] -a0

Check rebuild status
megacli -ShowSummary -aAll | grep Rebuild