Hello,   If Joe's suggestions don't help, it maybe that chkdsk doesn't know how to deal with a H/W snapshot.  It's expecting a local vss snapshot to be available.   You can try to unregister the Equallogic VSS H/W provider then run the chkdsk process.  Solution Title HOWTO: Temporarily disable the EqualLogic VSS provider? Solution Details Under some circumstances, you may need to disable the EqualLogic VSS hardware provider module, but be able to re-enable it later.  Please note that the content of this solution is not officially documented or supported. This has been observed to work in the past, but is not guaranteed to be stable or functional in the future. Until this is documented, we should not provide it to customers.  This can be done with the "eqlvss" command under Windows:  C:\Program Files\EqualLogic\bin>eqlvss /unregserver  You can confirm it has been removed with the following command:  C:\Program Files\EqualLogic\bin>vssadmin list providers  vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool  (C) Copyright 2001 Microsoft Corp.  Provider name: 'Microsoft Software Shadow Copy provider 1.0'  Provider type: System  Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5}  Version: 1.0.0.7  To add it, do the following:  C:\Program Files\EqualLogic\bin>eqlvss /regserver  C:\Program Files\EqualLogic\bin>vssadmin list providers  vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool  (C) Copyright 2001 Microsoft Corp.  Provider name: 'Microsoft Software Shadow Copy provider 1.0'  Provider type: System  Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5}  Version: 1.0.0.7  Provider name: 'DELL EqualLogic VSS HW Provider'  Provider type: Hardware  Provider Id: {d4689bdf-7b60-4f6e-9afb-2d13c01b12ea}  Version: 3.1.1.0  Regards, 
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 /scanThe 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.
snapshot error when running chkdsk on CSV