Before SP1 on SQL 2012, I was able to create tempdb on RAM disk with imdisk utility.
Increased performance significantly.
We have 1 Terrabyte of RAM, 450 Gb is used for SQL server the rest is empty...
No I get error: "An unexpected error occurred while checking the sector size for for file M:\systemdb\XYZ.mdf, Move the file to a local NTFS volume... Microsoft SQL Server, Error: 5177"
Which does not make sense because, the user MSSQLSERVER has full access to the RAM disk... and I put the user also under Administrator group just to be sure that it had full access...and I am using the same way to create RAM disk as before.. SP1...
Any ideas why this changed