Over the past week, I've had a drive on one media agent, that suddenly lost all of its free space. This is an agent that has been running fine all year, with roughly the same amount of disk space free. The disk is small (1 TB) and is an SSD used to hold dedupe data only. If I get into the command line, and do a "dir /s", the amount of space used is what I would expect. Doing a "dir /s /ah" does not show any significant usage.. I have noticed recently and problem with SIDDB processes that did not seem to close properly, and tended to accumulate over time.
Last week I completely ran out of space, so I stopped the services, and then copied all of the files from that drive to another one, reformatted the drive and then copied them back, reclaiming all the "lost" space.
chkdsk before showed more files that did not show using "dir", so I presume that this is where the "lost" space is.
This appears to be hapenning agin, as I am not missing another 60GB on the same drive.
I am going to install SP16 (am on SP15), and see if this alleviates the problem, and the problem with the "stuck" SIDDB processes, but if anyone has another suggestion, it would be appreciated.