BTRFS partition not mount parent transid verified failed and child eb corrupted

aug7744

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Using BTRFS in the last 3 months with good experience ... until today ... BTRFS is very good, but when happen a problem it is a big trouble.
Using Lubuntu 20.04 64 bits being an partition for root and another for home both being BTRFS. Not swap partition.
home partition BTRFS configured in fstab how being
defaults,noautodefrag,compress-force=zlib:9,nospace_cache,noatime,commit=36000,max_inline=0

Allways when system crash I run the command below
sudo btrfs check --force --readonly --progress /dev/sda
if has any error almost allways is "cache and super generation don't match, space cache will be invalidated"
I run the command below to fix
sudo btrfs check --force --readonly --progress --clear-space-cache v1 /dev/sda
and after
sudo btrfs check --force --repair --progress /dev/sda
Never had problems doing it.

Today the system had crashed. thus had run the command below in sequence in partition home
sudo btrfs check --force --readonly --progress /dev/sda
sudo btrfs check --force --readonly --progress --clear-space-cache v1 /dev/sda
sudo btrfs check --force --repair --progress /dev/sda

When the system was restarted in user login screen not is possible continue loading the system how if the home partition not was mounted.
Starting in recovery mode and running the command below
sudo btrfs check --force --readonly --progress /dev/sda
was that result

parent transid verified failed on 30638080 wanted 73427 found 73667
ignoring transid failure
error child eb corrupted : parent byte nr=305725544 item=1 parent level=2 child level=0
error failed to read block groups input/output error
error cannot open filesystem

Not is possible mount the home partition

After I had tried several others commands being in sequence
btrfs resuce zero-log sda
restarting adding in fstab
usebackuproot
mount -t btrfs -o usebackuproot /dev/<btrfs-device
and again
sudo btrfs check --force --readonly --progress /dev/sda

and nothing fixed with the same error results.

Not bad block or others problems with the disk.
How recover that partition ?

I've been using computers for years and never seen anything like this happen.
See the link about BTRFS when has problems
Now trying learn about ZFS if is good for compression and easy to fix.
Thanks very much for your reply.
 

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