error messages::ext4-fs error(device dm-0) after write-error on swap device

recently, i moved fedora29 into the desktop harddrive from external hard drive (Miraculously, i installed fedora29 on external hard drive anyway ^^:) as installed as soon, it was too slow. i added up second swap partition on the secondary hard disk(/dev/sda1:4TB) after that, my computer was always busy with hdd led on(hdd is too busy to work). then i removed the second swap partition, the secondary disk from the /etc/fstab. Since then, my computer became unstable..like write-error , kernel panic...etcdm-0(maybe mounted disk name with /etc/fstab) How could i fix the problem??? /etc/fstab /dev/mapper/fedora-root / ext4 defaults 1 1 UUID=9b493611-0fb7-491b-9fc0-ae42f5a54a3f /boot ext4 defaults 1 2 /dev/mapper/fedora-home /home ext4 defaults 1 2 /dev/mapper/fedora-swap swap swap defaults 0 0 blkid: /dev/sda1: UUID="5fedba61-5bf3-4c50-9818-bc63b771306a" TYPE="ext4" PARTLABEL="primary" PARTUUID="84d63caf-ab6d-4350-af92-39e87755a96d" /dev/sdb1: UUID="9b493611-0fb7-491b-9fc0-ae42f5a54a3f" TYPE="ext4" PARTUUID="9b543e06-01" /dev/sdb2: UUID="qnCBLA-tzkn-Lt0E-m9ed-4Ujj-W1A2-OAtoFG" TYPE="LVM2_member" PARTUUID="9b543e06-02" /dev/mapper/fedora-root: UUID="5a09dd9f-03c5-474f-8e13-08aa5cde26a4" TYPE="ext4" /dev/mapper/fedora-swap: UUID="28a3e920-5418-4799-9e18-5e501b838447" TYPE="swap" /dev/mapper/fedora-home: UUID="b3c099eb-83e1-4328-98bf-e8f46c59e35f" TYPE="ext4". df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 2.0G 0 2.0G 0% /dev tmpfs 2.0G 0 2.0G 0% /dev/shm tmpfs 2.0G 1.1M 2.0G 1% /run tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup /dev/mapper/fedora-root 49G 19G 29G 39% / tmpfs 2.0G 4.0K 2.0G 1% /tmp /dev/sdb1 1008M 203M 737M 22% /boot /dev/mapper/fedora-home 52G 9.0G 41G 19% /home tmpfs 395M 0 395M 0% /run/user/0