This
to my understanding...
No one yet has had an issue ...where they could not install solydmo ...


It appears that this is a partitioning issue.
as in "already mounted partitioning issue"
I am not sure of your exact methods of install you have or are trying to accomplish...
If you are trying to install solydmo from the running iso directly to a usb .....without first "installing" solydmo onto a hard drive...
that may be the issue...

Reading up on how to use and troubleshoot systemback may help you better than I can in trying to fathom what steps you have done...what steps you haven't ...how you are implementing it..



Solydmo is not useless, please do not use blanket statements...
for you ..currently ....it is an issue....
which hopefully can be resolved.

The only problems that have been had with solydmo are..
A couple of people in the past have gotten upset at the fact that solydmo would not install the way they wished...
Unfortunately their intended me method was their belief that solydmo was to be installed directly on the n900...
past their misunderstanding....
there has not been any problems with it .

This coming Monday -Tuesday
I will try to find time to work on a copy of solydmo and see if I can replicate your situation.

Patience please...
this is simply my own effort involved ..
I do what I can when I have the time for the enjoyment , ease-of-use, and benefit of fellow members.
there is no corporate salary or benefits..
and the complaints department has little sympathy .


UPDATE:

Actually ...
I am a little obsessive when it comes to puzzles and solving things and such ...
and could not wait to figure out what the problem was.
So I sat down right after the writing of the above post and went through your posts and issues...
Answering your last questions posed..
and
Replicated the issues accordingly...

Last questions posed :

quote
"Can you answer to me this questions?
1. Is this possible to create a persistent live system on USB flash from SOLYDmaemo.iso? (I would prefer simple yes/no)
2. What program do I have to use to achieve point 1? (LiLi, Rufus, UUI, DD, other)
3. Does creating .sblive (from systemback as far as I know) make it possible to put it on USB stick and use it as live persistent system? (yes/no)"
unquote

Answers:

Answer #1 - "Simple NO"
(proper explanation here *)

Answer #2- Lili is nice, UUI is nice , DD is fine,
Rufus works fine .
I use Rufus all the time .
Works Great.
Easy to use, not complicated, and works on pretty much any distro I have tried.
BUT NONE OF THEM WILL DO WHAT YOU WISH IN REGARD TO QUESTION #1
(please again refer to the more detailed and thorough explanation here * )

Answer #3- Yes (and I am not going to go into further detail on the issue here)




* The problem you are experiencing is that you are asking too much of systemback and it's ability.

The iso of the distro is the standard solydx distro iso..no extras ... past the maemo oriented material available on it ....
and systemback ..
to avoid any potential conflicts during installation...
none of which interferes with normal installation of the iso as a whole.

The issue you are having is that you wish to copy the mounted iso using Systemback on the iso ....(to a usb, sd or other form..)

or to use some colorful explanation...
instead of in the shipyard like everyone else.
you are trying to build a boat..while ON a boat.

As per your previous mentions of not wanting to use a hard drive
or
even partition briefly..
a space just big enough for the installed distro..
to then immediately utilize systemback to install to another device (usb, sd, etc..)

Systemback's ability is to take AN INSTALLED distro and work with it.

Systemback's abilities are deliberately limited working from INSIDE a mounted distro iso.
Not by my doing, but by the nature of the process of utilizing a mounted iso .
Other such apps and programs like systemback will ask exactly the same of you.
This is not an issue with Systemback specifically.

Hence the limited use you are experiencing with systemback on the iso.

To utilize Systemback properly...

installation ...

as I have stated in the very detailed and specific walkthrough...
must be done first.

Then systemback can alter and copy and replicate and install , (and all the other little goodies it can do) since it then has full permissions to do so.

to use a suitable comparable...
In essence what your desire is .. ..
Is to take a Christmas wrapped xerox printer and expect it to print a document for you without first unwrapping and opening the box and setting it up to be able to print said document for you


You can still use the Solydmo iso and what it has on it...
But until you actually follow-through with the instructions of proper installation and then deployment of your desire...
you are limited in your use.

Sorry man..
wish I could change the fundamental nature of the processes involved..
But I don't make the rules...
I just work within the parameters of them.


Note to all:
Please understand the instructions, directions, abilities and parameters in walkthroughs and refer if necessary to the methods of usage makers of specific programs offer. (for example Systemback)