In the event that both of the 2.5-inch 300 GB 10K RPM 6 GB/s SAS internal drives (OS) in RAID1 are replaced, you must run the Dell Restore Manager (RM) utility to recover the DR Series system OS drives.
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To properly remove or replace any DR Series system hardware, you must observe and use the best practice shut down and start up procedures. For a comprehensive set of removal and replacement procedures with step-by-step instructions, see the DR Series System Owner’s Manual.
For more information about the best practices, see DR Series System: Proper Shut Down and Start Up and Shutting Down the DR Series System.
| 1.  | Power off the DR Series system by selecting Shutdown in the Support page of the DR Series system GUI. | 
| NOTE: If you do not allow the NVRAM super capacitor sufficient time to discharge, the NVRAM status will report DATA LOSS when the DR Series system is subsequently powered up. | 
NVRAM is a field replaceable unit (FRU) in the DR Series system (Note: NVRAM is not part of the DR4300e Core system). The super capacitor that powers the NVRAM double-data rate (DDR) memory must be able to move its contents to the solid-state drive (SSD) during a power loss.
If any of these conditions occur, the NVRAM requires either a failure recovery or a replacement.