anyone?  thanks

Thanks for the reply.  However, I know that this is not DBCC checks causing the error - in fact, DBCC checks complete fine without any write failures. 

I've...

This doesn't sound right.  Permitting delegation on the machine account suggests that the service is/was running as a local system account.  I would use setspn to delete all the SPN's...

thanks

there's nothing in the default trace unfortunately.

So, they're definitely associated with snapshot files, comprised of <filename.extension>:MSSQL_DBCC<database_id_of_snapshot> 

https://support.microsoft.com/en-gb/help/2974455/dbcc-checkdb-behavior-when-the-sql-server-database-is-located-on-an-refs-volume

Something else, other than CHECKDB creates them though...

That's the strange thing... we're not running checkdb (or anything remotely like that), though they're constantly popping up.  There's no reads from them, writes only.  For every ndf file there...

Hi,

No, we're not using diskeeper...

What DBCC commands would they be that's constantly creating the DBCC8 files?  If they're snapshots, then it looks like it could be...

Hi,

After further investigation, the write failures don't appear to correlate with SAN levelling.  It happened about 40mins ago (nothing out of the ordinary happening on the SAN), initiated...

Have you got round to rebalancing those tempdb files yet?

Windows updates, anti virus scans, monthly reports?  Just thinking outside of the box...

What type of SAN do you have?  Anything going on like adaptive optimization / tiering?

I have changed to SQL to pull, rather than push the records.  That works fine.  Still interested to understand why the original INSERT fails...

thanks

Thank you both for the suggestions about kerberos.  I'm pretty sure that side of things is working okay.  I can see kerberos connections coming from other servers, and this one,...