Hi. I have a WS2012R2 Hyper-V cluster using CSVs stored on EQL.

I was testing things out and you're supposed to be able to run chkdsk C:\ClusterStorage\ /scan while the CSV volume is online (not in maintenance or redirected access mode).

However, I'm getting this error:

PS C:\Users\admin> chkdsk C:\ClusterStorage\CSV1 /scan
The type of the file system is NTFS.
The parameter is incorrect.

A snapshot error occured while scanning this drive. Run an offline scan and fix.

What I've done:

 - on all cluster nodes, logged on to the vss-control volume

 - in HIT Kit, added the group in "PS Group Access", including VDS/VSS access (I've also tried adding Smart Copy access, however that shouldn't be necessary, right?)

 - ensured there's a snapshot reserved defined on the EQL volume (there was different error when I had snapshot reserve set to 0 before)

Any ideas what's the problem? There are no more details in the eventlog.