USB Stick in a cRIO-9033 gets sometimes unusable

[EWiebe]

Hi all,

I have a problem:

A cRIO-9033 with a connected (inserted) USB stick - sometimes the connected USB stick gets unusable.

The problem is that this USB stick (with FAT32) gets sometimes unusable.

In the logs I can see:

kernel: FAT-fs (sdc1): error, fat_free_clusters: deleting FAT entry beyond EOF

And after this entry the file system is set to read-only.

Restart of the cRIO does not help !!!

After restart same issue: Filesystem is set to read-only

The USB stick is needed inside application for the storage of test result data.

I have this workaround. After this it works some time: unmount and re-format the USB stick from the cRIO (over putty) :

umount -l /dev/sdc1
mkfs -t vfat -F 32 /dev/sdc1

A NI technical support engineer told me:

I have reviewed the issue extensively and based on Linux, this error happens when there are I/O errors on the flash drive.
Remounting resets the error and returns you to a working scenario. However, I wish to try and repair the issue.
There should be a tool that does this, could you please run the following command when the issue appears:

dosfsck -a /dev/sdc1

After that the issue did not appear again, but I wanted to let you know about this issue.

The Service Request is closed because not appeared any more but I think it will appear again in some time.

Perhaps anybody had similar / same situation.

BR

Eugen Wiebe