RSA Product Set: ID Plus
RSA Product/Service Type: Authentication Manager

RSA Version/Condition: AM 8.7 SP1, 8.7 SP2, 8.8

RSA Authentication Manager server fails to boot Entering Emergency Mode (Dracut Emergency shell) - with a warning /dev/sda3 does not exist 

/dev/sda3 is defined as root. Sometime restart fails with error "/dev/sda3 does not exist". 

This is a recognized behavior/bug in SUSE, where the disk partition label changes dynamically. At times, it does not match the label used during the Linux installation, which can lead to restart failures.

https://www.suse.com/support/kb/doc/?id=000018449

Reboot the virtual machine. This restart should automatically fix the issue. 

It is observed that when rebooting the Virtual Machine from vSphere, you may bypass Emergency Mode; however, you will be unable to interact with anything while the start job for /dev/sda3 is running indefinitely.

In that case - Turn off the virtual machine via VMware vSphere or Hyper-V, and then restart it.

Note: The anticipated release of RSA Authentication Manager 8.8 P2 is provisionally set to incorporate the SUSE fix.

If you find that you are frequently affected - Due to your scheduled maintenance activities necessitating regular server reboots - please contact RSA support for a workaround suggested by SUSE 
https://www.suse.com/releasenotes/x86_64/SUSE-SLES/15-SP2/index.html#jsc-SLE-11117