No, that means you're not following my logic. Hot-swapping power supplies and/or drives obviously improves you reliability (assuming you don't configure for speed but for redundancy). But they're not a guarantee against data-loss, only off-site back-ups that you test are a guarantee for that.
After all, if you controller goes on the blink your precious raid could easily die with it.
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What about RAID? If I follow your logic, you're claiming that by adding more harddrives to a RAID cluster I'm increasing the risk of data loss?
No, that means you're not following my logic. Hot-swapping power supplies and/or drives obviously improves you reliability (assuming you don't configure for speed but for redundancy). But they're not a guarantee against data-loss, only off-site back-ups that you test are a guarantee for that.
After all, if you controller goes on the blink your precious raid could easily die with it.