My script uses the -auv flags, so I see stuff going on. It was when this stopped for a very long time at a point where I did not expect that I though it had hung. I ran things again, though from a terminal, and when it seemed to hang ran strace -p <number> and could see things going on (no copy, just check and compare). And eventually it terminated normally after an hour or so. Actually I went to bed, but could see steady progression through the directory tree, since my backups are dated by year and month. Why I did not see this in the rsync script output I don't know (my Double Commander icon opens a terminal -- I like to have progress indicated). Have not nailed down precisely why strace shows activity but rsync does not, and suspect I'll need to delve into details of the code (I may end up having to give a talk), but it seems that rsync is working. It is also possible, as suggested by (I think) Alex, that the disk or controllers could be flakey, though the target disk is only a few months old. Both source and target are USB connected, which is another possible point to investigate. Thanks to all who responded so quickly. And I'll have to remember strace. Not a command I've used before. Best, JN On 2019-01-06 9:49 p.m., Richard Guy Briggs wrote: > On 2019-01-06 17:49, J C Nash wrote: >> The title says it. I have rsync set up to run from the Double Commander 2 pane file >> manager. If I select parallel directories of modest size, rsync runs fine. (There are >> very few or no updates. I'm just trying to ensure all is up to date.) >> >> However if I choose a high level directory on each side, it goes for a while then seems to >> just hang. > > Are you able to "strace -p <pid>" on that process (on each machine if over ssh) > to see if it is actually hung or doing something potentially useful? > >> I'm wondering if I've overflowed some sort of index or buffer. Suggestions? >> >> I don't mind if it gives me a warning and stops. Then I can simply use smaller chunks. >> However, no message and not stopping is a problem. >> >> Best, JN > > slainte mhath, RGB > > -- > Richard Guy Briggs -- ~\ -- ~\ <hpv.tricolour.ca> > <www.TriColour.ca> -- \___ o \@ @ Ride yer bike! > Ottawa, ON, CANADA -- Lo_>__M__\\/\%__\\/\% > Vote! -- <greenparty.ca>_____GTVS6#790__(*)__(*)________(*)(*)_________________ > To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org