• normally only happens when a file is concurrently modified, but this file was not in use
• this may indicate disk corruption on the sending or receiving machine (starscream or jupiter)

$  aaronmk@starscream:~/bien
l=1 overwrite=1 inplace=1 sync_local_dir=~              sync_remote_subdir=             bin/sync_upload  ~/"VirtualBox VMs/**" 
<f.st.... VirtualBox VMs/Ubuntu/Ubuntu.vdi
 12476166144 100%   23.57MB/s    0:08:24 (xfer#7, to-check=20/55)
rsync: read errors mapping "/Users/aaronmk/VirtualBox VMs/Ubuntu/Ubuntu.vdi": Input/output error (5)
<f+++++++ VirtualBox VMs/Ubuntu/Snapshots/{06e4edae-d353-47d3-a748-5681fd6ada1c}.vdi
      208896 100%  289.77kB/s    0:00:00 (xfer#8, to-check=11/55)
WARNING: VirtualBox VMs/Ubuntu/Ubuntu.vdi failed verification -- update retained (will try again).
<f..t.... VirtualBox VMs/Ubuntu/Ubuntu.vdi
 12476166144 100%   73.93MB/s    0:02:40 (xfer#9, to-check=20/55)
rsync: read errors mapping "/Users/aaronmk/VirtualBox VMs/Ubuntu/Ubuntu.vdi": Input/output error (5)
ERROR: VirtualBox VMs/Ubuntu/Ubuntu.vdi failed verification -- update retained.

reoccurs on retry:
<f..t.... VirtualBox VMs/Ubuntu/Ubuntu.vdi
 12476166144 100%   72.91MB/s    0:02:43 (xfer#1, to-check=20/55)
rsync: read errors mapping "/Users/aaronmk/VirtualBox VMs/Ubuntu/Ubuntu.vdi": Input/output error (5)
WARNING: VirtualBox VMs/Ubuntu/Ubuntu.vdi failed verification -- update retained (will try again).
^CKilled by signal 2.

$  aaronmk@starscream:~/bien
l=1 overwrite=1           sync_local_dir=~              sync_remote_subdir=             bin/sync_upload --exclude="/Library/Saved Application State" --exclude="/.Trash" --exclude="/bin" --exclude="/bin/pg_ctl" --exclude="/bin/unzip" --exclude="/Dropbox/home" --exclude="/.profile" --exclude="/.shrc" --exclude="/.bashrc" --exclude="/VirtualBox VMs/Ubuntu/Ubuntu.vdi" 
WARNING: Library/Thunderbird/Profiles/9oo8rcyn.default/global-messages-db.sqlite failed verification -- update discarded (will try again).
<f.st.... Library/Thunderbird/Profiles/9oo8rcyn.default/global-messages-db.sqlite
   100335616 100%    5.21MB/s    0:00:18 (xfer#115, to-check=50563/238948)
rsync: read errors mapping "/Users/aaronmk/Library/Thunderbird/Profiles/9oo8rcyn.default/global-messages-db.sqlite": Input/output error (5)
ERROR: Library/Thunderbird/Profiles/9oo8rcyn.default/global-messages-db.sqlite failed verification -- update discarded.