Rsync "protocol incompatibility" when doing LOCAL rsyncs

Question

Hey guys, I'm trying to update a copy of some data from my Xsan to a seperate volume, but instead of copying a TB over again, I'd like to be able to use rsync to copy it over.
At first I tried it preserving ownership, times, permissions, groups, etc, but for right now I'm just trying to get it to work at all. The simplest ver
I tried using the command
sudo rsync -r --progress /Volumes/THESAN/raw_content/sfx/ /Volumes/SPAREDRIVE/raw_content/sfx
and it runs for a minute or so, before I get
Invalid checksum length 6815744
rsync error: protocol incompatibility (code 2) at /SourceCache/rsync/rsync-24/rsync/sender.c(59)
rsync: writefd_unbuffered failed to write 103 bytes: phase "unknown" [generator]: Broken pipe (32)
rsync error: error in rsync protocol data stream (code 12) at /SourceCache/rsync/rsync-24/rsync/io.c(909)
Any advice greatly appreciated.
Thanks.
-- James

Answer 1

Do you by chance have some very large files in this directory? (multiple GB or more)
You might try "sudo rsync --archive --verbose --progress /Volumes/THESAN/raw_content/sfx/ /Volumes/SPAREDRIVE/raw_content/sfx" instead. This will give a little more info as to what's going on when the process dies.
What's the line right before the invalid checksum showing you?
You might also try "sudo ktrace -d -f /ktrace.out rsync --archive --verbose --progress /Volumes/THESAN/raw_content/sfx/ /Volumes/SPAREDRIVE/raw_content/sfx" and then "kdump -f /ktrace.out | tail -1000" just to see if you can get any better idea about what rsync is doing right before the command fails.
Steve
MacBook Pro, iMac G5   Mac OS X (10.4.6)