Since you apparently planned to re-rip anyway, I suppose that's not all that bad. But "... a few weeks ..." of time sure seems like a good case for backups !!
Note that your comment that "... it was all movie ISO's and I'm going to start replacing those with MKV's, so would have to re-rip anyway " isn't correct => if you've already got the ISO's, there's no need to re-rip, you can simply create MKV's from the ISO [MUCH faster and easier than re-ripping]. In fact, you can set up a batch transcode to do an entire folder full of ISO's without intervention [i.e. you could do your entire collection if you wanted => obviously the transcoding would run for a LONG time, but it'd take about 5 minutes of "your" time vs. all those hours of "computer" time.
I did this recently. ~300 DVD ISOs took less than a day to convert to MKVs and copy to a new folder on unRAID.