I'm previewing Windows 8 as well and I didn't know about this feature.
Are you familiar with the older Windows Server version called Drive Extender? If so it seems these are similar but Storage Spaces apparently has more features.
I ask because if you are familiar with Drive Extender then you may be able to answer your own question. How are these files stored on the multiple disks, and were you able to access them from outside of the Drive Extender environment?
If yes, then I would assume the same with Storage Spaces. In fact there is a FAQ in the link below, (at the end of the article, that tells more about this;
A couple more links for you, in case it is useful;
I note from the MSDN blog one FAQ about migrating from Drive Extender to Storage Spaces, ie;
Q) I use Windows Home Server with Drive Extender. Is there a tool to help me migrate data from the Drive Extender format to Storage Spaces?
No. You will need to create a pool on a Windows 8 PC with a fresh set of disks. Then, you can simply copy data over from your Drive Extender-based volumes to a space within your pool. The functionality delivered through Storage Spaces is more flexible and better integrated with NTFS, so it will generally be more reliable and useful.
That may or may not be significant. If Storage Spaces changes significantly when W8 goes retail you may have to create a new Storage Space and copy the data over.
Limited information from me I know, but I hope it helps.
I've been using Win8 since September. I installed the OS on a separate partition which installed a dual boot option on startup. When the Customer Preview was released, I reformatted the Win8 partition and installed it.
The computer is a Dell 1747 laptop with a touchscreen.
Far the most part I use it from the 'Desktop' mode. I've made some modifications to allow me to go directly to the desktop mode after the sign-in screen, skipping the initial screen and a small single button application to shutdown/restart the computer from the desktop.
So far I'm ok with the OS and the changes they have made. There are some bugs but the system seems rather stable.
What I'd like to do is use 'Storage Spaces' for the new features it provides. What I'm concerned about is if I re-format my disks and begin using it for my data... will it be compatible with the RC release or the final version of Win8.
Does anyone have any thoughts on this?... Maybe I need to check with the Building Win8 team on this.. but any thoughts would help. But until I'm sure, I'm not going to use this feature with real data.
Thanks for your thoughts