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[SOLVED] Trouble with new USB

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Re: Trouble with new USB
« Reply #15 on: December 08, 2014, 01:59:19 AM »
 

Alex

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Well that looked much better - the USB flashed its weak LED at me, for the first time since I broke it. It too 16 minutes, I feel positive about it. Now to Gparted...

:)
 


Re: Trouble with new USB
« Reply #16 on: December 08, 2014, 02:11:05 AM »
 

Alex

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Used Gparted:



I'm not sure what to do with the unlocated part...

Tried to mount it, and...got the same message (as above)  again:



:(
 

Re: Trouble with new USB
« Reply #17 on: December 08, 2014, 02:51:21 AM »
 

Alex

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I also tried "sudo fdisk -l /dev/sdb" and this is what I get, it means nothing to me lol



Thought it might help...
 

Re: Trouble with new USB
« Reply #18 on: December 08, 2014, 03:28:11 AM »
 

bobw

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This doesn't help with your problem, Alex, but it may be of interest to other people who want to "zero out" a storage device.  Apparently, the process can also be achieved using Gnome-disk-utiliity (aka Disks), with the advantage that you are using a GUI rather than a terminal and it tells you what it is doing and reports % progress.  You select ""Overwrite existing data with zeros (slow)" in the Erase box when formatting the device.


On my quite low-end system it took 21 seconds to do a 1G test partition on the hard drive (compared to about 1 second for a standard reformat).
 

Re: Trouble with new USB
« Reply #19 on: December 08, 2014, 06:40:23 AM »
 

gold_finger

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Alex,

Just to be sure I know exactly what has happened, are you saying that you re-ran dd command (with fixed "bs=4K") and it only took 16 minutes?

Your fdisk -l output is not showing anything unusual/(wrong) -- just that there is one FAT32 partition on USB.

The GParted pic you posted -- is that what it looked like after zeroing out?  Or did you add that FAT32 partition to it yourself?

If the FAT32 partition was on there after running dd command, something is not right.  There should be nothing at all on the USB after dd completes -- not even a partition table.  If dd ran correctly, you'd need to create a new partition table on USB first, then create new partition(s) on it.

(As an aside, I have no idea whether "Disks" program works and/or if it truly zeros out a drive.  I've never used it for anything myself.)

As far as your error message goes, can you tell us exactly how you are trying to mount the drive?  What are the exact steps you're trying?

Reason I ask is because GParted pic shows that it is currently mounted at "/mnt".  So I'm wondering two things:
  • Are you trying to mount something that is already mounted? -- thus getting an error message.
  • Why is it mounted there?  Normally, when a USB gets plugged into computer it gets mounted by system at "/media/username".
P.s.  I've confirmed that my previously dead 2GB USB is back to working now.  I burned live ISO to it, booted and did an installation from it.
Last Edit: December 08, 2014, 06:43:07 AM by gold_finger
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Re: Trouble with new USB
« Reply #20 on: December 08, 2014, 07:35:44 AM »
 

Alex

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Quote
Just to be sure I know exactly what has happened, are you saying that you re-ran dd command (with fixed "bs=4K") and it only took 16 minutes?

Yes I re-ran the corrected dd command and it was finished in 16 minutes

Quote
The GParted pic you posted -- is that what it looked like after zeroing out?  Or did you add that FAT32 partition to it yourself?

I followed your instructions. These were: to repartition the drive using Gparted after zeroing. I used fat32 to make it compatible with Win.

Quote
As far as your error message goes, can you tell us exactly how you are trying to mount the drive?  What are the exact steps you're trying?

I plug in the drive

It shows up on the desk top



I right click on it

I left click on the "mount volume"



Immediately I get the error message shown a few times above

I also get the same error message if I left click on the "open"

:)






Last Edit: December 08, 2014, 07:48:01 AM by Alex
 

Re: Trouble with new USB
« Reply #21 on: December 08, 2014, 07:54:14 AM »
 

gold_finger

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Sorry to say -- I'm stumped!

EDIT:  Can you plug in the USB, open Thunar file manager and look to see if it shows up under "/mnt"?  If yes, see if you can save something to it.

Aside from not knowing how/why your prior pic was showing that the USB was mounted at "/mnt" instead of "/media/alex", steps you just listed look fine and it should be working.

Can you open GParted and do Device -> Create Partition Table -> "msdos"; then make a new FAT32 partition that covers whole disk?

If not, maybe try one last time to zero it out with dd.

If still no luck, maybe you just got unlucky and ended up with a dud USB.
Last Edit: December 08, 2014, 07:57:09 AM by gold_finger
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Re: Trouble with new USB
« Reply #22 on: December 08, 2014, 03:00:34 PM »
 

Alex

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Quote
EDIT:  Can you plug in the USB, open Thunar file manager and look to see if it shows up under "/mnt"?  If yes, see if you can save something to it.
Yes it shows up under /mnt:



But when I try to save something e'g' a tex document it does not let me:




[/color]
Quote
Can you open GParted and do Device -> Create Partition Table -> "msdos"; then make a new FAT32 partition that covers whole disk?


Yes:



But it still does not work.  :(

I have researched the problem online a bit and it seems that problems between Lexar USBs and Linux are not uncommon, but i do not think that is the problem here as the USB worked untill I fiddled with it - I feel that I somehow removed the part of it that tells any (it now wont even work with Windows - I tried it on my daughter's computer - it does not even 'see' it!) computer how to store data on the USB (is that the USB 'booting' software?).

I think that I should be doing something like is described in this article:

http://www.linuxjournal.com/article/8366

But I can hardly understand 1/2 of what he is talking about! LOL

:)
 

Re: Trouble with new USB
« Reply #23 on: December 22, 2014, 01:06:26 AM »
 

N4RPS

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Hello!

The article is 9 1/2 years old, and, given today's larger drives, may or may not still be relevant...

73 DE N4RPS
Rob


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