IBM Storage Scale System 6000 Service Manual page 18

Figure 7. Checking that the SAS cables are properly fastened
9. Make sure that all the PSUs show good LED status.
Check all four PSUs and make sure that all of them have both green LEDs on (DC Good and AC Good).
The next figure indicates where these green LEDs are on a PSU:
Figure 8. Verifying PSU status based on the PSU green LEDs
Removing and replacing an NVMe drive
Refer to the service procedure to remove and replace a faulty NVMe drive in an IBM Storage Scale System
6000 enclosure.
The following steps are the high-level flow of the procedure:
1. Confirm the faulty drive location based on the fault drive LED.
2. Prepare the faulty drive for replacement. If you are replacing an IBM FlashCore Module, see "Preparing
an FCM 4 drive for service" on page 17.
3. Remove the faulty drive, which has its amber LED on.
4. Insert the FRU drive into the slot.
5. Configure the FRU drive after replacement.
6. Run common system health check by using the SSR utility.
Note: If you encounter an error or an unexpected result, contact the next-level support.
6 IBM Storage Scale System 6000: Service Guide