Hello,
The arming of an audio track (record or echo) with octa-capture takes 4 seconds. Still not fixed ....
I do not know with any other sound card if it is the same.

This is likely due to the Octa Capture drivers and not Sonar.  If that's the case, the Bakers will not be able to fix it.
 
However, what are your i/o buffer settings?  If they are high you might lower them to see if it arms faster.

I see you have the latest drivers but are you on the latest system program?
http://roland.com/support/article/?q=downloads&p=UA-1010
 

try renaming your aud.ini file aud.old so it can rebuild itself.

I have seen this issue but only using settings where the audio interface is having difficulty handling the settings.
Usually this translates to not being able to smoothly produce audio as well. I have never seen it happen if the audio is not dropping out or is not having sample rate issues.

Yes I have lastest driver and I don't have this delay with Cubase or Maschine. I tried everything, but without results.

BlackBird67
Yes I have lastest driver

I was asking about the system program (not drivers).
 
Cheers..