I am trying to find the cause of a really strange problem. At this point, the problem is academic because I already have a solution/work-around.
I have a 28GB DEM Mosaic in GRID format that will not open when it is stored on my local RAID 5 array. ArcGIS Pro 2.3 gives an error of "cannot load data - unsupported format."
Any thoughts as to why the same fairly large GRID format raster can be opened on all other drives but not on a RAID 5 array?
That sounds like a TS case, as there could be a driver-specific issue that is causing the problem. ESRI is pretty good at working with hardware vendors (e.g video card) to maintain compatibility. Is this software or hardware RAID? What vendor? What type of disks behind the RAID? Are you able to break the RAID and go to 0,1, or 10? Same problem in 2.4 or ArcMap? What errors are being thrown in the Windows Event Viewer?
So, the problem turns out to be my lack of detailed knowledge about the storage limitations of ESRI Grid. One of the top level folders which contained the Grid had a space in the name. I completely forgot about this limitation singe the geodatabase, shapefiles, etc. do not have this limitation.
It is funny, because I always tell my students -
NEVER USE A SPACE IN THE NAME OF A FILE OR FOLDER!