Jeff Brown

Absolutely positive this isn’t the case for me. I’m not sure if it’s the specific combo of controller and SSD that I have, or if it’s an issue with having first upgraded to 6.4 and then downgrading to 6.3.5 but I can assure you there IS in fact some issue present. With that said, I do apppreciate the suggestions but still am faced with the same problem. Should i I consider looking into a different controller, different SSDs, a SATA card or a fresh install of unRAID etc at this point? Thanks, Jeff

Downgraded to 6.3.5 and appears the same issue is present. Discard operation is not supported. Any other ideas how I might go about troubleshooting? Thanks, Jeff EDIT: Also upgraded to 6.4.1 out of curiosity and same issue

Much appreciated - how would I go about downgrading? Any concerns with docker/vm/plugin compatibility etc. switching between versions? Should I do a parity check first? Had a look and see that 6.4.1 is out - I'm currently on 6.4. Should I attempt the upgrade first? Jeff

Hi All, Trying to get SSD trim working on my BTRFS Cache Pool with no success so far. Here's the rundown: Dell R510 12 Bay with dual X5650s 48GB ECC RAM 12 x SATA Drives formatted XFS totaling 44 TB --> 36 TB usable with dual parity. 2 x 500GB Samsung 850 EVOs in RAID 1 BTRFS Cache Pool installed in the two 2.5" internal slots LSI 9207-8i flashed to latest IT Firmware (Started as an HP H220) Started with a Dell H200 flashed to LSI-9211-8i IT Mode Firmware but soon found out that the SAS 2008 chip doesn't agree with SSD trim. Looked around the forums/reddit and found a few posts suggesting that the LSI-9207-8i with the newer SAS 2308 so have purchased, flashed and installed but still getting an error saying "the discard operation is not supported" when I try to run fstrim manually on the cache pool. Any ideas? Is there another controller I should try? The R510 12 bay version doesn't allow use of any internal SATA ports on the motherboard so that's not an option. My only other though so far is to purchase a plain old SATA card and install just for the internal SSDs. Thanks, Jeff