Import current diskset in new install (as secondary array) - Solved

[Grra]

I have several Synologies (is that the correct plural form?) and this question is in regard to the setup of my DS1821+
 
I have 5 disks installed in a SHR2 array.
 
I’m now thinking about buying into the Surveillance Station for 10 cameras.
 
My thought is that I would like to have the video stored on SSDs that I will buy (Micron 5400 MAX is the front contender at the moment).

Dockers in the future and the current logserver can also be write intensive, and other reasons are why I would like to have the SSD array to be the "boot" array and where all applications and data will be stored by default.
 
So I’m thinking/wondering if the following would work?
 
If I remove my current 5 disks from the NAS.
I put in the (SATA) SSDs and create a new volume and install and configure the system.
 
Is there a way to import the array that I have on my 5 disks and retain the data, this would practically make this array the second array in the NAS?
 
I don’t want a kludge solution that will probably be possible by running some (many) shell commands.
 
So the question is if anyone has tried this and know that it is officially supported?

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OK so Here is my Edit after trying the following.

Inserted the two 2.5" SSDs in the NAS in bay 1 and 2.
Removed the current 5 disks.

Started the NAS and configured the two SSD's in SHR-1.
System installed and set up. Shut down system.

Put in the ohter 5 disks in bay 4-8.
Started system.

System boots up.

Looking in the Storage Manager and the five old disks are seen as an array and I have the option to "adopt" them (don't remember the specific term uses in the GUI).
After doing this and the system running a check for this array - which took 24+ hours for me.

Then the 5 disks are seen as Volume2 and I did not need to restore from backup.

Note!
I did not setup any share before I did the above operation.
When it was done then the shares I had on the old array (5 disks) showed up as shared folders.

I don't know if this is a feature in the latest version of DSM or not. But I'm surprised in a positive way as I was expecting to have restore from my backup.

[ed]

Most likely these drives will show up as uninitialised and will ask you to format them. You will need to copy that data to a USB backup and then copy them back when you have done reset on the NAS.
Having SSD as a first volume will install OS and apps on this volume.

[Grra]

Most likely these drives will show up as uninitialised and will ask you to format them. You will need to copy that data to a USB backup and then copy them back when you have done reset on the NAS.
Having SSD as a first volume will install OS and apps on this volume.

This is what my investigations have also lead to - but practice and theory are not always the same so I thought to ask if anyone had done what I propose and could give their summary of what actually happened.