Just to add another/different option.

I had a good 760G 2.5" hard drive left over when I upgraded my laptop to SSD. For less $20 I bought a USB3 case for it. It runs at aboutt SATA speeds and needs no other power.
While bigger than a USB stick it's still small enough for my backpack.

Joe

On 07/11/2014 10:44 PM, Steven Haigh wrote:
On 12/07/2014 3:24 PM, ToddAndMargo wrote:
On 07/11/2014 01:49 PM, Patrick J. LoPresti wrote:
On Fri, Jul 11, 2014 at 1:40 PM, Patrick J. LoPresti
<[email protected]> wrote:
Try giving the "--size-only" option to rsync.
Better yet, try "--modify-window=1". From the rsync man page:

--modify-window
                When  comparing  two  timestamps, rsync treats the
timestamps as
                being equal if they differ by no  more  than  the
modify-window
                value.   This  is  normally  0 (for an exact match),
but you may
                find it useful to set this to a larger value in some
situations.
                In  particular,  when  transferring to or from an MS
Windows FAT
                filesystem (which represents times with a 2-second
resolution),
                --modify-window=1 is useful (allowing times to differ
by up to 1
                second).


   - Pat

Hi Pat,

--modify-window=1
       3 hr - 9 sec

--modify-window=10
       3 hr - 8 sec

Rat!  I really though this sounded right


I did notice that the bugger the file (with no changes)
the longer it took.  So, I think they are still doing
check sums.

Any way to turn of the check sum testing?
Now you're starting to get off task... How can you sync something if you
don't know if it matches? Sure, you can only go off timestamps - but
what then? It leaves you with a situation where you may get files that
are different and you'll never know.

You'd be much better off getting a better flash drive (ie not add hack
upon hack that may not help) and fixing the root cause of the problem.

Hell, get a small laptop HDD and put it in a USB caddy case. Get a small
SSD (they're cheap!) and put that in a case...

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