Synology BTRFS repair

Repair synology BTRFS volume

btrfs fi show -d
(/dev/mapper/vg1000-lv)

syno_poweroff_task -d

(or: umount /volume1)
(or2: umount /volume1 -f -k)

Check to see if all us unmounted:
df -h

mdadm --stop /dev/vg1000/lv

btrfsck /dev/vg1000/lv

btrfs check --repair /dev/vg1000/lv

btrfs rescue super-recover -v /dev/vg1000/lv

vgchange -ay

e2fsck -nvf -C 0 /dev/vg1000/lv

fsck.ext4 -pvf -C 0 /dev/vg1000/lv

(or: e2fsck -pvf -C 0 /dev/vg1000/lv -C O)
(do not do this: -C fd)

Tried again:

> btrfs scrub status -d /volume1
scrub status for 98dcebd8-a24e-4d16-b7d1-90917471e437
scrub device /dev/mapper/cachedev_0 (id 1) history
scrub started at Tue Jun 10 23:36:50 2025 and was aborted after 03:57:18
total bytes scrubbed: 13.32TiB with 1 errors
error details: csum=1
corrected errors: 0, uncorrectable errors: 1, unverified errors: 0

> btrfs scrub status -d -R /volume1
scrub status for 98dcebd8-a24e-4d16-b7d1-90917471e437
scrub device /dev/mapper/cachedev_0 (id 1) history
scrub started at Tue Jun 10 23:36:50 2025 and was aborted after 03:57:18
data_extents_scrubbed: 223444115
tree_extents_scrubbed: 3395356
data_bytes_scrubbed: 14590691647488
tree_bytes_scrubbed: 55629512704
read_errors: 0
csum_errors: 1
verify_errors: 0
no_csum: 2450
csum_discards: 0
super_errors: 0
malloc_errors: 0
uncorrectable_errors: 1
unverified_errors: 0
corrected_errors: 0
last_physical: 15662894481408

And again,

> btrfs scrub status -d /volume1
scrub status for 98dcebd8-a24e-4d16-b7d1-90917471e437
scrub device /dev/mapper/cachedev_0 (id 1) history
scrub started at Wed Jun 11 03:56:46 2025 and was aborted after 03:40:22
total bytes scrubbed: 13.32TiB with 1 errors
error details: csum=1
corrected errors: 0, uncorrectable errors: 1, unverified errors: 0

> btrfs scrub status -d -R /volume1
scrub status for 98dcebd8-a24e-4d16-b7d1-90917471e437
scrub device /dev/mapper/cachedev_0 (id 1) history
scrub started at Wed Jun 11 03:56:46 2025 and was aborted after 03:40:22
data_extents_scrubbed: 223443880
tree_extents_scrubbed: 3395228
data_bytes_scrubbed: 14590688092160
tree_bytes_scrubbed: 55627415552
read_errors: 0
csum_errors: 1
verify_errors: 0
no_csum: 2450
csum_discards: 0
super_errors: 0
malloc_errors: 0
uncorrectable_errors: 1
unverified_errors: 0
corrected_errors: 0
last_physical: 15662894481408

Sadly, same thing. No logs in the log center. No info. No help. Nothing.