September 5, 20187 yr This issue started a few days ago and keeps getting worse. My Dockers crashed the other day, I found a bunch of BRTFS errors in the event log after searching the forums I found it was due to the Cache pool (2 SSDs) being full. Even though it shows that it has plenty of space free. I deleted and recreated the Docker image and rebooted the server. Ever since then I've been having issues with Docker especially Plex. When running fix common problems it keeps telling me that unRAID can't write to the cache pool because it's full but it shows there is space there. This morning I got up and the server was locked up and I had to hard power it off. After coming back up Docker service won't start and I'm getting lots of BRTFS errors and it's telling me the "Cache Disk free space is less than the cache floor setting" but I have it set to 5gb and it shows currently as having almost 65gb free. SMART tests show no errors on the cache disks. I have attached diagnostics from the last few days. Any help with this issue is greatly appreciated. tower-diagnostics-20180905-0805.zip tower-diagnostics-20180903-1721.zip tower-diagnostics-20180901-1545.zip Edited September 9, 20187 yr by nickro8303
September 5, 20187 yr See the FAQ, you have two different size cache devices, using default raid1 profile free space is incorrectly reported, usable space is equal to the smallest device, so you really are out of space despite what's reported by the GUI.
September 5, 20187 yr Author @johnnie.black I see. I'm almost certain when I set up the cache pool originally I did it as RAID 0 to maximize the space available this was a few years ago though so my memory is foggy but I don't think I would have set it to RAID 1. Not sure how or when that changed. Thank you for your help. Edited September 5, 20187 yr by nickro8303
September 5, 20187 yr It wouldn't change on it's own, it would when running a balance on older releases, but note that raid0 would double your usable space, but it wouldn't use all the space and free space would still be wrongly reported, you could use single profile for that, more info here: https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=480421
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