Rorke Data Galaxy HDX2 GHDX2-2430S-24F4D - Manual (Page 92)

Chapter 4: Subsystem Connection and Operation
Subsystem Connection and Operation 4-25
Audible alarm – If any errors occur during the initialization process,
the onboard alarm will sound in a hastily repeated manner.
Drive tray LEDs should normally start flashing, indicating the RAID controller
units are attempting to access the hard drives.
System firmware can be configured to support a delayed sequence for starting
drives. Please consult your interface-specific Operation Manual for more
details.
NOTE:
The subsystem has been designed to run continuously. If a component
fails, the fault can be corrected online.