I have a file geodatabase with a mosaic dataset that has over 900 geotif files. At first, I used my local hard drive on a Windows VM to expediate the processing time from days to a few hours using ArcGIS Pro 2.8. I am able to preview the overviews and drill down to the geotif itself, it's perfect. I close out of Pro then I copy my geotif folder (900ish tif files) and the overviews folder to a NAS using a UNC path that my ArcGIS Server 10.7.1 (image role) has access to. I open up Pro and copy over the file geodatabase to NAS using the UNC path. I repair the paths then analyze them redraw the mosaic datasets without any issue. Before publishing, I create a folder data store with the UNC path and linux path which have the same folder structure and it validates. The problem is when I publish to my standalone ArcGIS Server as an image service. All I get are the black and white crosshatch patterns. The ArcGIS Server logs states that my overviews are not accessible although I can access them on the linux server itself and is has the correct permissions and owner. i am stumped and esri support were unable to help. Thanks!
I have a simular problem. Did you get any solution?
I have the same problem and we are solving this with ESRI.
When we changed Windows UNC paths to rasters in mosaic dataset to Linux paths, e. g. \\MyServer\data to /MyServer/data, the content of published mosaic dataset through the image service has displayed correctly.