This is also my advice, being certain that you get them in the same slot you had them before. This model does indeed have dual hard drive bays. It’s not configured as RAID out of the box, and no one in their right mind would configure a laptop as RAID 5. You might mirror them for redundancy, or combine them for a single drive letter, but striping gives you only a slight boost of speed while rendering all your data vulnerable to a single failure.
I think you mean RAID-1. (RAID-5 requires 3 or more drives.) And I don’t think it’s uncommon to have RAID-1 on a laptop, for those who want maximum performance. Especially since laptop drives are slower than desktop counterparts.
But anyway, even if it’s a RAID-0 (mirroring) configuration, if you take out one drive and connect it to another computer, I think it would be unreadable. So this seems like a very real possibility.
Is that true? Seems like it would not be, although I admit I’ve never tried it. Why couldn’t you use a mirrored drive in a singleton configuration, as long as you aren’t trying to boot from it?