I am concerned. After a power outage, I had a problem with my Drobo Pro. I was able to get it online again, but the ext3 superblock was unavailable. I ran e2fsck, and it repaired the superblock, but when it started asking about deleted blocks in groups, I realized I did not know what it meant. The Drobo used capacity went down from 76% to 74% and when I mounted the disk Read Only so that I could copy stuff off, the linux machine claimed only 9GB was used.
All files seem to currently be there with their original data intact.
I got a new Mac Mini server because Drobo is officially supported on it, and was hoping to create a new HFS+ partition and copy the files over using MacFuse. Once I got drobo dashboard installed and the drobo mounted, the capacity lights on the front of the drobo went out, and drobo dashboard is usually telling me only 9GB is used, but occasionally flashes up with the more correct 3.74TB used.
If I create the HFS+ Partition and start copying files, will the drobo write over blocks that may actually have data in them, or will it protect areas where a filesystem has written even if they become “deleted”? Or is this a complete unknown at this point?