For now, we are going to increase server space and backup to disk on the server.
However, longer term we need to figure out how to fix this and I am sorry to say my DB2 DBA/TSM inexperience is such that I am struggling to interpret exactly what this article is telling me to do to resolve this problem.
I think we need to configure something on the TSM server to not use the simultaneuos write when backing up the database.
If this is for a TSM Backup/Archive client and COPYCONTINUE=YES, the backup operation would be retried without the simultaneous write.
If anyone could help shed some light on this, I would be very grateful!