Emerson ATCA-8310 Manual page 53

Data Loss
Removing the blade with the blue LED still blinking causes data loss.
Wait until the blue LED is permanently illuminated, before removing the blade.
3. Remove the face plate cables, if applicable.
4. Unfasten the screws of the face plate until the blade is detached from the shelf.
5. Remove the blade from the shelf.
ATCA-8310 Installation and Use (6806800M72D)
Hardware Preparation and Installation
53