It must be a Dynamic disk, not Basic.
dynamic disk
No, its supported on dynamic
RAID-5 to create a 50MB Raid-5 partition across the three disks enter command diskpart create volume raid size=50 disk 1,2,3 Source Windows Server 2008 Network Infrastructure Configuration Lesson 2 page 30
Disk Manager
Disk Spanning (raid 0)
You can try MiniTool partition wizard ,MiniTool Partition Wizard is a Windows based PC and Server partition manager software. Our server partition software supports both MBR and GUID partition table (GPT) on 32/64 bits Operating System including Windows XP, Vista, Windows Server 2000/2003/2008/2008-R2/2012, Windows SBS, Windows 7 and Windows 8.
You copy the RAID or Non RAID drivers file from the cards driver CD to the disk Read the documentation to find out which folder on the CD contains these files The card drivers must be installed during the Windows installation. you are given an opportunity at the beginning of the Windows installation to provide the drivers on floppy disk or a USB device.
Raid 1 suppports the Mirroring if any one hard disk faild one will get the copy of the data and fault tolerent. after replacing the hard disk you have to re create the mirroring. Raid 5 supports stripped with parity the data will be deviced into blocks and stored in all the drives with the parity information. if any one or two hard disks faild the data will be available.
Everything depends on which classes you are trying to use. If use Windows API, yes you can write to the same drive from different threads. Writing is done by Windows. There is no difference for RAID because windows takes care of it. As far as you have RAID drivers installed you should not have any problems. If you are using something different than Windows API, then the answers are not as straight forward. You will have to specify what you are planning to use.
Raid 5
Yes. Windows Vista still supports both legacy floppy controllers and modern USB floppy drives.
If I recall, XP can utilize a maximum of 2Gigs of RAM. I do not think there is any limit to the disk space.