[SOLVED] Raspbian: file is not really deleted in usb drive

[nesswaw]

Hello,

I have a Raspbian Stretch on RPI model 1
I have created a script that delete files on a USB flash drive => it's work perfectly on RPI 1

Now, I re-installed Strtech on RPI 3, config script, etc. => But deleting files on the key is random

When I make an "ls" in the dir, it's empty.
I insert the key on a Windows computer and find my file

I don't understand anything, how is that possible?

And the problem is random, it works on three times out of three.

An idea?

Thanks

[RaTTuS]

the usb has gone read only , create a file under windows - can you see it on the raspberry ?
or even back on windows after a eject and reload
or you are not mounting the drive right

[FTrevorGowen]

Hello,
I have a Raspbian Stretch on RPI model 1
...

Is that a really early B1 with the (extra) USB polyfuses? IIRC, something similar happened with mine (raspiblack**) running a UB-stick-based MoinMoin Wiki. I was able to read and clone/copy the Wiki to a new USB stick and run it on a later Pi. (Since then, it's been cloned again and is now run on my P2B. My "Raspberry Pi webpages" are an "export" of said Wiki). Said polyfuses were "removed" because of various problems discovered "back then".
Trev.
** http://www.cpmspectrepi.uk/raspberry_pi ... uePis.html

[nesswaw]

Hello,

I set the RPI3 SD card to RPI1 and everything works.

There is indeed a hardware problem with the RPI3...

What can we do about it? Or I have to do a special mount command?

How to solve the problem with these polyfuses?

Thank you for your help

PS: Details RPI

- RPI1 => Revision 000E => Model B Revision 2.0 512MB, (Sony)
- RPI3 => Revision a02082 => 3 Model B 1Go

[nesswaw]

After multiple tests, adding an umount command directly after copying the files would solve the problem??

How do you feel about that?

Thanks

[FTrevorGowen]

...
PS: Details RPI
- RPI1 => Revision 000E => Model B Revision 2.0 512MB, (Sony)
- RPI3 => Revision a02082 => 3 Model B 1Go

The "512Mb etc." implies that RP1 is not a B1 (256Mb + USB polyfuses) but a B2 so your issue appears not to be related to the issue I had (which I associated with the USB polyfuses because of various, other problems, reported, probably due to partial fuse activation.) - "red herring", unfortunately.
Trev.

[Paeryn]

After multiple tests, adding an umount command directly after copying the files would solve the problem??

How do you feel about that?

Thanks

Beforehand did you ever unmount the USB stick before removing it (either from the command line or the eject option from the GUI)? If not then there is always a chance that data hasn't been sent to the stick, the system generally buffers writes rather than doing them immediately (it's quicker to update an in memory block and can save writing the same blocks multiple times at the expense of loosing changes if you don't unmount before removing).

[nesswaw]

Hello,


On RPI1, it works:

1) RM command on usb drive
2) Physically removed usb drive
3) Umount command (via script and rules udev)

But it does not work on RPI3

On RPI3, it works:

1) RM command on usb drive
2) Umount command (via script)
3) Physically removed usb drive

I can close this topic, the problem is solved.

Thank you for your help