报错

kernel:[ 575.194113] EXT4-fs (sda2): failed to convert unwritten extents to written extents -- potential data loss! (inode 669089, error -30)

解决

smartctl检查

https://www.reddit.com/r/debian/comments/k2gzy4/ext4fs_failed_to_convert_unwritten_extents_to/

sudo apt install smartmontools

smartctl -t long /dev/sda
smartctl -a /dev/sda

禁用write cache

sudo apt-get update && sudo apt-get install hdparm
get write cache status
sudo hdparm -W /dev/sda
disable
sudo hdparm -W 0 /dev/sda
enable
sudo hdparm -W 1 /dev/sda