Thanks for your reply, however the strange part is when I view the quorum disk through windows explorer, I cannot see what is filling up the disk. I could try increasing the space available to the quorum drive but that's just a fix not a root cause solution. The quorum disk is on a SAN and the cluster nodes are virtualized, so even increasing disk space would need an outage but so far I haven't had any luck finding out what's steadily eating up disk space.