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A while ago I purchased 2 kingston 240GB SSDs which were on sale and I ran my windows from one of them. The other one has just been sitting there for almost a year now.
I now want to RAID them but my question is, since I have my current SSD running with my OS, apps and files etc, if I plug the other one in, and make the BIOS settings to RAID them, will I loose any data? Is it possible for me to just plug in the drive, make the settings adjustments and for it to work (Like my drobo for example) or will I loose anything?
If you want RAID 0 (which is a stripe and not real/normal RAID), then yes. You almost certainly will need to reinstall. There might be very rare exceptions to this on hardware cards, but most of the time those rebuild the array and need at least some redundancy for that. RAID 0 does not use any redundancy. – Hennes – 2015-11-04T14:42:58.173
As for the actual question: Change from one disk (SSD or HDD does not matter) to two disks in an array. That has been asked before on the site. Please first read those answers. – Hennes – 2015-11-04T14:43:39.403