OK, we cloned the drive to an SSD off the Intel-based machine, now it's 
on an AMD64.

It found the ethernet 7i92 card no problem.  However, any attempt to 
move an axis throws a Joint Following Error immediately.  So, it don't work.

 >uname -a
Linux localhost 3.2.0-4-rt-686-pae #1 SMP PREEMPT RT Debian 3.2.78-1 
i686 GNU/Linux

Ran a latency test, found the number was surprisingly high:
servo 1ms interval 1056515 jitter  58515
base            interval  82973 jitter 57973

What concerns me is the i686 installation on an AMD64 machine. Does that 
need to be changed?

Danny

On 5/8/2016 6:37 AM, John Thornton wrote:
> While dd is touted as easy and convenient it is indeed a linux guru tool
> only with many gotchas and very difficult to use. Here is an example dd
> comand line for your viewing pleasure.
>
> sudo dd if=/dev/sdb1 of=/dev/sdc1 bs=4K count=2654720
>
> and how the numbers are arrived at lol
>
> fired up a python REPL as a calculator and checked partition and
> filesystem sizes
> for /dev/sdb1 I calculated (end-start)*sector size
> from tune2fs you multiply block count by block size
> divide two times by 1024 to get MB
> divide the partition size by 4k to get a proper block count for dd
>
> I use Clonezilla almost everyday and if you clone a drive the receiving
> drive must be the same exact size or larger. If they are not the same
> exact drives then you must use the expert mode and tell Clonezilla to
> not check the target drive size.
>
> The easy way is to copy the home directory then install from a live cd
> then copy the linuxcnc directory to the new drive.
>
> JT
>
>
> On 5/7/2016 10:34 AM, Danny Miller wrote:
>> So as per previous thread, I may be moving this to another PC.  And
>> probably change to an SSHD.
>>
>> I spent a ridiculous amount of time getting the OS and LinuxCNC RT
>> installed and configured.  And I didn't do all of it myself so it's not
>> a straight shot to repeat.  I'm just saying if I start from scratch
>> again, this will not be a quick operation.
>>
>> How reliable is it to just copy the entire installation to a new drive
>> on a new (different) machine?
>>
>> On Windows, I've just moved my old drive to a new machine a number of
>> times.  But I was foiled when I replaced my AMD-based motherboard with
>> an Intel-based MB, no boot.   My LinuxCNC machine is currently on an
>> Intel Core Duo, and I might change to an AMD-based machine. Will it even
>> be able to boot?  Will it be easy to adapt to an AMD without a full
>> reinstall?  What's it take to adapt it?
>>
>> I was told there's a convenient tool or method for creating an image of
>> the whole installation (OS and LinuxCNC) and packing it up.  Is that
>> true?  'Cause I sure wish one of those had been on Bittorrent, that
>> would have saved my a crazy amount of time.  If it can be done maybe
>> I'll do it and put it out there for others.
>>
>> Danny
>>
>>
>>
>>
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