You may experience this error when installing the SCOM database to a SQL 2005 cluster.
**Run the installation on the SQL node that hosts the Virtual Node**
This error is caused when SQL 2005 is missing disk dependencies within the SQL 2005 Group.
1. Within the cluster administrator take the SQL group offline.
**If the disks are missing you MUST take the SQL group offline in order for any "new" disks to be recognized. You will not be prompted to take it offline either.... 🙁
2. Properties of SQL server - Dependencies tab -> make sure that all disks are listed.
You should have a SQL Network name dependency, and the Physical disk should be listed here as well.
3. If the disks are not there - add them - bring the cluster back on-line
4. Re-run the SCOM installation
*** For additional Information Please refer to: