I'm getting this same error periodically in my logs:
s2s_syncer: Failed to execute rsync synocmd at updateTaskProcess. source=[/tmp/<somefile>], target=[admin@<mytargetserver>::], passwd:[/tmp/s2sPass_Sync <Sharename>] ret=44
In my case however, it is the Shared Folder Sync option that seems to be the culprit. Some googling turned up that "ret=44" means "out of space". In fact I am also seeing this error in my logs: Shared Folder Sync failed due to watch share [sharename] failed. Num of subfolders in the share exceeds the maximum.(error:[No space left on device])
I have been made aware of a 100K folder limit, which I am under. I do however have alot of files (over 1 million), and some that are fairly large (several gigabytes). I don't store VMDKs on this volume though, so nothing as big as 60gb like your seeing.
Still, I wonder if the upper threshold of what can be cached is what we're crashing into?
Have you contacted support?