Hi Kim,

On Mon, Oct 10, 2016 at 4:50 PM, Francis Kim <fkim@berkcom.com> wrote:
No problem.  The DS4243s can also be upgraded to a DS4246 by replacing the IOM modules, if you want to avoid the 3/6 transition issues at some point.

This is explicitly prohibited as per the Storage Subsystem Technical FAQ:

CAN THE DS4243 BE UPGRADED TO A DS4246?

No. The DS4243 is not upgradeable to the DS4246 

Although I would like to know why this is not technically possible...
We were having a discussion about this amongst colleagues just last week, and I'm pretty sure I tried this out in the past and didn't seem to run into any problems...

Best regards,
Filip