One of the instances in our Always-On cluster fails to come online. The instance is located in our DR cluster.
The following is found in the cluster events: "The Cluster service failed to bring clustered role 'SQL Server (NICD_DR_TFS01)' completely online or offline. One or more resources may be in a failed state. This may impact the availability of the clustered role."
From what we have found it seems that the storage for the instance is located at drive letter S: but the instance is looking for it at drive letter U:
This is what we found in the event viewer on the host server:
FileMgr::StartLogFiles: Operating system error 2(The system cannot find the file specified.) occurred while creating or opening file 'U:\MSSQL11.NICD_DR_TFS01\MSSQL\DATA\modellog.ldf'. Diagnose and correct the operating system error, and retry the operation.
FCB:<g class="gr_ gr_458 gr-alert gr_gramm gr_inline_cards gr_disable_anim_appear Style replaceWithoutSep" data-gr-id="458" id="458">:Open</g> failed: Could not open file U:\MSSQL11.NICD_DR_TFS01\MSSQL\DATA\MSDBData.mdf
for file number 1. OS error: 3(The system cannot find the path specified.).
The cluster manager shows that the drive should be S. This was also confirmed as correct in Explorer and storage for a different instance exists at drive letter U: (this instance using drive letter U has zero issues).
How can we correct this?