I recently upgraded to v6.11.5 and installed an NVMe drive to replace the current SATA SSD cache drive using these instructions: Stop the array - Did this. On the main page click on the cache device you want to replace/upgrade and select the new one from the drop down list (any data on the new device will be deleted) - Did this. Start the array - Did this, however, the array did not start immediately. I received message from the browser that the page needed to be refreshed. When I did so, the Main page showed the array to still be offline. I opened the Main page in a different tab and still had the same result. There was no indication that anything was taking place and the only buttons available at the bottom of the Main page were Reboot, Shutdown, and Sleep IIRC. I rebooted and lost GUI access. The login screen would occasionally appear but would provide a 503 Service Unavailable error. This continued for 4 hours, during which I would check randomly to see if the status changed. After ~4 hours, I was able to login and GUI access was restored. The array was online without me turning it back on again. All buttons were available at the bottom and the Format button was added. The new NVMe drive was set to Cache but was unmountable because it had not been formatted. I ran the formatting process. A btrfs device replace will begin, wait for cache activity to stop, the stop array button will be inhibited during the operation, this can take some time depending on how much data is on the pool and how fast your devices are. - This and the remaining steps did not take place. Is there something else I was supposed to do in order to have my old appdata etc. move to the new cache drive? If I ran the Kluth CA Backup/Restore Appdata prior to the upgrade, can I do the restore on the new drive? Thanks in advance! cylon-diagnostics-20230326-1339.zip

Under normal circumstances the 2nd option would be easier, unless something goes wrong during the balance, so always good to make sure backups are up to date before starting, then add the NVMe device to the cache pool, wait for the balance to finish, it will finish when the cache activity stops and you can stop the array, stop array, unassign the 840 EVO SSD, start array, a new balance will start to delete the old device, once that finishes you are done.

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Upgraded Cache - btrfs Device Replace Did Not Start

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Solved by JorgeB

March 27, 20233 yr

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March 27, 20233 yr

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@JorgeB Great! Thanks for your help again.

@MAM59 Thanks for your help as well and for jumping into the conversation so quickly after I posted!

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March 27, 20233 yr

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Things seem to be working as expected!

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Upgraded Cache - btrfs Device Replace Did Not Start

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