I think most experts agree that magnetic storage (HD or tapes) is more stable in the long run. But that’s assuming it’s [I]stored properly[/I]. You don’t mention how your drive was stored, or even if it was stored at all. Which leads me to believe it has most likely been in use while the CD-RW was stored.
Think about spinning that CD-R/W at 14x for threeÂ¹ to nineÂ² thousand hours, all the while reading and writing to and fro. No disc could hold up against that kind of abuse. But most hard-drives do just that, and usually have a five to six year life span.
Even if you had a thousand such examples, it’s still not a fair test unless the drives are [I]stored[/I] properly.
Â¹ 8 hours a day is 2,920 hours over the course of a year.
Â² 24 hours a day is 8,760 hours over the course of a year.