Storage Spaces Volume Management question

[St4t1c]

Hello,

I'm currently checking out the neat features Win8 (& Server) has to offer, and i got stumbled a bit into Storages spaces.

Here's what i've done till now.

Added a few disks into a pool, various sizes and speeds, and made a new Virtual disk with fixed provisioning and with a capacity equal to the total of the pool. So far so good.

Now i've added a few more hard disks and added them to the previous pool. Worked like a charm and the percent used for the pool was decreased accordingly. After that i tried to expand the previous Virtual disk, but some how i cant get it to use the 100% of the remaining (added) space of the pool.

Is there a special expression i have to use in the "Extend Virtual Disk" dialog, like "100%" or "All" to use the remaining space?

All i see is the current size of the virtual disk, a empty space to enter a number and a drop down menu for the unit (mb/gb/tb)

Thanks a lot!