Marc

ran a scanning check on the disk no errors/issues

OK good idea to open a ticket. I run the trouble shooter and get it uploaded. Thanks for sticking with me and enjoy the long WE!

OK So i restarted as suggested and run several re-balancing sessions. Unfortunately the 3.0 unusable disk space remains. I'm starting to think that the re-balancing in my case will not solve the issue. Somehow Drivepool does not recognize the 3TB space as usable and that also impacts the re-balancing. It might be the fact that i extended the drive after it was in use by Drivepool. Should i remove the drive from the pool, re-initialize and format and return it to the pool? I rather not, but if it is the only way...

Yes indeed partitioning a disk is a bad idea with duplication. That's a good point! I changed the balancers as suggested and the targets per disk moved immediately. I posted new pictures below. If i press the triangle it runs for a short period and goes back to this light green pool bar. I will let it run for 24 hours and see what happens. Thanks again for the input!

Thank you for taking the time to help me on this issue, that is much appreciated. I have pushed the Re-balancing arrow a couple of times, with increasing the priority to speed it up. It does start copying files but stops after max 15 min, with no effect on the unusable space. What you suggest with the disk, is this something I could optimize by creating partitions? I have all my four slots occupied. I do have scanner. I didnt change the balancing settings, just added and enabled disk space equalizer after reading a forum thread on unusable space for duplication. What would you recommend as the sequence of balancers (i put scanner as 1 again and equalizer as 2nd).

Dear SB team, I run a small home server with 4 disks and use Drivepool with 2x duplication (haven't figured out how to setup snapraid). Unfortunately, Drivepool reports 3.03TB in "Unusable for duplication". I read the forum and noticed the advice to install the plugin "Drive equalizer", which i did. I have forced re-balancing in Drivepool several times in the hope that this will reduce the unusable space, but it went from 3.05TB to 3.03TB. I'm not sure what I need to do to claim the 3TB back. I would like to highlight one issue which I had, not sure if relevant. I inserted the Raw 6TB drive into the server and for some reason it converted it to MBR. I realized this late and Drivepool had already transferred a considerable amount of data to the disk. I used EaseUS Partion Master to convert without data loss the MBR drive to GPT. Then I extended the 2TB partition of the drive to the full 5.5TB. I had no problems with my Drivepool after this, but 3TB showed as unusable for duplication. Advice is much appreciated.