Sun Microsystems SUN STOREDGETM 5310 NAS - Manual (Page 213)

Chapter 3 Storage Arrays 3-13
6. Check the lights on the front and the back of each drive module, and verify that
all drive Active lights are on but not flashing.
If one or more drive Active lights are flashing, then data is being written to or from
the disks. Wait for all drive Active lights to stop flashing, and then go to step 7.
7. Check the Cache Active light, then choose one of the following steps, based on the
status of the light.
Figure 3-12 and Table 3-1shows the locations of the status lights.
FIGURE 3-12 Lights on the Back of a Command Module