[Sheflug] File-sync weirdness

[Peter Humphrey <peter@xxxxxxxxxxxxxxxxxx>]

Hello list,

Here's a weird one and no mistake: transferring files via USB stick changes 
20 of the 462 files in some way, but not the others. Always the same 20.

I'm developing a website, hosted on Zen, and I want to keep two copies of 
the source files: one on my workstation and one on my laptop, using 
sitecopy to make the transfers. I do most of the work on my workstation, 
and when ready I "sitecopy -u tmvc.zen" (my local storage directory and 
also the name I've given to the site in ~/.sitecopyrc). I have sitecopy 
left at its default choice of using file sizes and timestamps to detect 
changes.

Fine so far. Then I go to the laptop and run "sitecopy -f tmvc.zen" to fetch 
the current state of the Zen host, followed with "sitecopy -s tmvc.zen" to 
bring changed files down to the laptop. (I have identical directory 
structure and .sitecopyrc on the two machines.)

Now if I plug a USB stick into the workstation to do the transfer that way 
instead of consuming bandwidth, this is what happens:

I run "rsync -av --delete tmvc.zen/ /mnt/sdd/tmvc.zen" to copy the local 
files onto the stick. Then with the stick plugged into the laptop I rsync 
the files across, and 15 HTML files and 5 JPGs are copied across. That's 
odd, I think, so I run the fetch and the sync in sitecopy and the same 
files are downloaded from Zen again. This works either way round: whichever 
way I copy files via the USB stick those same files are found to have 
changed and are copied again.

I can't think of anything to explain this behaviour. Both machines are 
connected to the same network switch at the time, and nothing else differs 
either as far as I can see. Maybe I've misunderstood rsync. I dunno.

-- 
Rgds
Peter

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