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The user used "mkfs.btrfs -f /dev/sdX" to create a new > volume. And he tested xfs on the same device without any issue. > > Reported-By: LUO Xiang > HDD Model:Seagate ST18000NM009J > uname -a:Linux pro69 7.1.3-arch2-2 #1 SMP PREEMPT_DYNAMIC Thu, 16 Jul 2026 > 17:41:28 +0000 x86_64 GNU/Linux > btrfs-progs: local/btrfs-progs 7.1-1 > dmesg: > [redacted] [snip] > Jul 19 21:28:37 pro69 kernel: BTRFS: error (device sde state A) in > cleanup_transaction:2067: errno=-11 unknown > Jul 19 21:28:37 pro69 kernel: BTRFS info (device sde state EA): forced > readonly > Jul 19 21:29:08 pro69 kernel: BTRFS error (device sde state EA): > cow_file_range failed, root=5 inode=268 start=68295892992 len=688128 > cur_offset=68295892992 cur_alloc_size=0: -30 > Jul 19 21:29:08 pro69 kernel: writepage_delalloc: 383 callbacks suppressed > Jul 19 21:29:08 pro69 kernel: BTRFS error (device sde state EA): failed to > run delalloc range, root=5 ino=268 folio=68295892992 submit_bitmap=0 > start=68295892992 len=688128: -30 > > the full dmesg can be retreived if interested. I /think/ I know the source of the problem. Errno 11 is EAGAIN and from writepage_delalloc() it means we've hit a "hole" or out-of-order metadata. This is exactly the kind of bug I'm trying to fix for 2 weeks now. Not sure why it surfaces now but I see it failing in my fstests setups as well. There's some hotfix attempts to it and I *hope* I have something upstream acceptible as well soon. This is a BTRFS specific sequential metadata thing XFS will not see because XFS is not putting metadata on sequential zones. I hope I can give you something to try by the end of the week. Byte, Johannes