If the lights are flashing inner and outer, that would mean 1 of 2 things.
1. If you have a dual drive unit the RAID is degraded and a drive may have failed internal to the enclosure. You can access the shared storage manager and it should tell you whether, drive A or drive B has failed. (To access the Shared storage manager on the Blue ring drive, open a browser and type the name of your drive).
a. or the enclosure may have failed.
- If this is a single drive, the drive or enclosure may have failed.
let me know if you figure it out or if you need more assistance.