Am 07.02.20 um 05:02 schrieb Chris Murphy: > On Thu, Feb 6, 2020 at 3:03 PM Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: >> >> There is a gotcha moving Btrfs between different archs. "Btrfs sector >> size", which is an internal Btrfs thing, not a reference to either >> logical or physical sector size of the device, must be the same as >> page size. Page size is 4KiB on x86 and I'm pretty sure it's 16KiB on >> ARM. >> >> So I wonder if you've run into an arch mixing problem (or bug). > > OK I pulled my Pi Zero out, which also uses Btrfs, and 4.19.75 kernel. > The Btrfs sector size is 4096. Same as on x86_64. > > So now I'm back to something stepping on the end of the drives, that > munged the backup GPT, and possibly munged Btrfs too. > > Has either device been mounted degraded since the successful scrub? > No, a degraded mount was not performed since the successful scub. This is very kind of you. I'm probably not fit enough to do these steps.
