You can't do that. with RAID 1 there is already a performanc hit. You would't want to mix HD sizes/types anyways it would cause even more problems. You should read up on RAID to get a better understanding. RAID 1 is mirroring with no stripping so the SSD would be running faster than the Platter drive. SSD is far more superior when it comes to read/write speed anyways. Furthermore, an important thing to remember is that with RAID 1 the drive space is cut in half. IE: if you setup a RAID 1 with 2x500GB drives you still would only have 500GB. It's best to have the OS on a single SSD and then make a seperate RAID for backup image/clones of C: and other data. If the Raid was made of SSD's the performance would be through the roof and the Read/Write would also be really good between C: & D:
Generally you want to start from scratch building an array and use the motherboards bios controller to set it up. There is a way to do it software wise within disk management in Windows 7. As an example leaving drive C the way it is and buy two more SSD, then in disk management you can mirror those two together. They would show up as one drive, but you would have backup redudancy with the two SSD because they are RAID and your clone image of C would reside on that RAID. Anything that gets sent to D: drive would be mirrored. You could go cheaper and use platter drives and do a RAID 0+1 stripping and mirroring. This would give some better read/write performance and do mirroring. RAID is nice, but it's more expensive. Many people just have JBOD (just a bunch of disks) and don't even do RAID and just use backup software like True Imaged. It all depends on your specific needs. Do you need performance, redundacy or both? You can get as elaberate with RAID as you want. It's up to you to decide if you want your OS mirrored. However, there is always a chance of it not mirroring right during the crash. You download a virus the virus goes on the mirror. Things like that. This is why a snapshot clone of the drive there is a guarantee there. Hope that helps you out.
Edited by technonymous, 28 August 2014 - 02:32 AM.