| posts: 9,827 | Location: UK
Yes you can, you will get a 240GB RAID drive and can create another partition of 120GB.
You may not be able to get TRIM working, so make sure the drives you use have good garbage collection.
If not, the drives will slow down and wear themselves out faster.
When SSDs die, they often just die, you dont get a chance to backup your data.
She should use a backup anyway otherwise you risk losing everything.
If you want to keep your current windows install, you will need to back it up and restore it after creating the array.
You may need to write align the SSDs for the restore, otherwise you can lose performance.