Event ID - 2

Event Id2
Sourcedmboot
Description1: Volume Volume1(C): started in failed redundancy mode.

2: dmboot: Failed to start volume Volume2 (no mountpoint).
Event InformationAccording to Microsoft: This problem occurs if the host bus adapter (HBA) miniport driver does not report storage devices to the server in a timely manner. If the HBA miniport driver does not report storage devices to the server during server startup, the disk devices will be unavailable to the server. Therefore, the storage devices do not automatically come online. If one or more members of a dynamic disk set do not eventually come online, the complete volume may be inaccessible until all members of the set come online. Generally, you can bring the dynamic disks online manually or by using a script that calls the Diskpart.exe utility to bring the disks online. However, you will most likely experience this same problem the next time that you restart the server. To resolve this problem, contact your SAN vendor to make sure that the firmware, the drivers, and the configuration are up-to-date and are configured correctly.

For more information about Description 2, click the link to Microsoft document.
Reference LinksDynamic disks do not come online after you restart the server

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