Lenovo ThinkServer RD550 - Manual (Page 58)

Hot-swap-drive status LEDs
Each hot-swap drive has two status LEDs on the front.
1 2
Figure 28. Hot-swap-drive status LEDs
1 Drive activity LED 2 Drive status LED Description
Off Off The drive has failed or is not present.
On, green Off The drive is present but not in use.
Blinking, green Off The drive is active and data is being
transferred.
On, green Blinking rapidly (about four flashes
per second), amber The RAID controller is identifying the
drive.
On, green On, amber The RAID array has failed and cannot
be recovered. You need to recreate a
new array.
Blinking, green Blinking slowly (about one flash per
second), amber The drive is being rebuilt.
44 ThinkServer RD550 User Guide and Hardware Maintenance Manual