My issue has been resolved by upgrading the firmware of my SSD from
SBFKB1C2 to SBFKB1C3.
https://askubuntu.com/questions/1107053/ubutnu-18-04-ssd-sometimes-
freeze-for-seconds
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I too am having an SSD corruption issue with Ubuntu 18.04, same exact
symptoms. I have a Kingston 480gb SSD, not nvme, connected over SATA. My
PC is a desktop, I have attached the output of lspci -vvnn. I have to do
manual fsck every 1.5 weeks or so. When I am using my PC, it will freeze
up
Here is the iotop log I mentioned above (attached)
** Attachment added: "iotop.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1746340/+attachment/5241595/+files/iotop.log
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