NoteBook

Appearance

F3 F3probe ​

F3 a simple tool that tests flash cards capacity and performance to see if they live up to claimed specifications.

Install ​

sudo apt-get install f3

Test method ​

quick method:

  • first we need to find the device path, using lsblk
  • If you see a mount point under the memory(like sdb1 under sdb for example), you need to unmount sudo umount /dev/sdb1
  • now it's time to checkit sudo f3probe --destructive --time-ops /dev/sd<replace_by_your_drive_letter_here>

slow method:

  • lsblk again.
  • You need to mount it this time and use f3write <your_mount_point>
  • wait until f3 finish
  • Then, f3read <your_mount_point>
  • after theses test you will show a report, saying how much data was corrupted, changed, or overwritten — a genuine card should show 0 for all of them.

Fix it ! ​

With f3probe, you can find the usable blocks, by using that number as the last sector, you can create a partition that ends where the disk actually ends, this way you can put data in without it being overwritten and corrupted when putting new files in.

sudo f3fix --last-sec=yournumber /dev/sdx

References : ​