hi everybody, recently i have this problem:
when i put my usb into my laptop and look to see if appear in nautilus doesn t work, I mean is just appearing like sbd for a few seconds and then disappear so i can t access the file inside.
I was thinking there was something wrong with the key and I bought a new one but same story.
all the other usb key I put inside the laptop work perfectly except this one.
I have to say all the other usb are formatted ext4 and the one doesn t work is formatted fat32 (because this format is suitable for my 3d printer and it works for a while before this problem).
I can actually see the usb from terminal but when I try to access the message I got is that the media is not found.

any help would be great
thank you

What does return? ?

thank you for the quick answer
bad away now is not even flashing sdb when I remove and reinsert the usb; the usb is actually made out of two bits, one is the usb reader and the other bit is a micro sd card, all the other ordinary usb working, now is it possible that is the usb reader not working and not the micro card itself?
i also tried a different micro sd card on the same usb reader and is not working either; when before the usb was coming in and out with the sbd flashing the output of lsusb was actually seeing the device adding an extra line on the otput, but not anymore. anyway there is the output

result of lsusb
result of ls -l /dev/sd*

Do you recognize the reader in the lsusb output?

That would be consistent with the reader not working.

You have used the wrong words. You have an SD reader that attaches via USB and SD cards the reader is supposed to read.



You really have 8 physical devices, each of which is partitioned into 16 volumes? Is there a limit to the number of volumes?

What on Earth do you need 128 partitions for?

1 members found this post helpful.

Is there a limit?

thank you everybody for the answers
I solve the problem, the issue was hardware and not software.
when I was plugging the micro sd into the reprap was reading correctly so I was thinking he problem was the reader itself and so it was.
I changed the usb reader spending the unmissable amount of 10$ and voila' everithing is in order.
my previous 0.99 cents usb reader worked for at least 10 prints before was berried in the garden, so 0.09 cents for a single printer is probably more expensive then 10$ divide 100 prints that i m suppose to do now.
so it is true that Chinese products are much "cheaper" but it turned out to be very expensive after counting 4 hours of time to figure out what was wrong.
just to prove me wrong I just purchase a new usb reader from singapore for 1.05$ ( the plastic looks a bit better I have to say)

thank you again for your help.