All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: Sandisk Cruzer 8GB recognized by OS but cant format or mount
PostPosted: February 28th, 2019, 21:34 
Offline

Joined: February 28th, 2019, 19:58
Posts: 1
Location: São Paulo
HI, my Sandisk Cruzer 8GB is recognized by Windows and Deepin. But after seconds disapear.

I tried to format in various softwares, no success. The applications can´t recognize the device even OS showing the USB unity in list.

Some programs says: "can´t format", "can´t write", "Write protected" but in fact they can´t find the USB device because it disapear after few seconds connected.

Somebody did see this before?

Thank fopr the help.


Top
 Profile  
 
 Post subject: Re: Sandisk Cruzer 8GB recognized by OS but cant format or m
PostPosted: March 1st, 2019, 5:58 
Offline

Joined: February 2nd, 2019, 1:21
Posts: 137
Location: Sri Lanka
i think this is hardware problem. just insert working SD for windows. if it is working then you have to throw the damaged chip.


Top
 Profile  
 
 Post subject: Re: Sandisk Cruzer 8GB recognized by OS but cant format or m
PostPosted: March 4th, 2019, 16:55 
Offline

Joined: January 7th, 2019, 12:19
Posts: 1
Location: United States
Look at it in Diskpart and see what the capacity is showing, if it is showing something in the kb range then it tells you it is seeing the control chip but not the storage chip. This usually means it is a hardware issue where there is a break somewhere in the tracings or the oscillating crystal (if applicable) has been damaged. If it is mounting then disappearing, there is a good chance that there is a short somewhere on the board and it is shutting it's self down or the OS/motherboard is shutting down the port to protect it. Use a multi meter to check the continuity of the resistors on the board or look for blank solder pads that should have a resistor on them. I've seen them blow clear off before if they get a big enough power spike.

Good Luck


Top
 Profile  
 
 Post subject: Re: Sandisk Cruzer 8GB recognized by OS but cant format or m
PostPosted: March 4th, 2019, 17:31 
Offline

Joined: August 18th, 2010, 17:35
Posts: 3306
Location: Massachusetts, USA
If the flash drive mounts every single time it is being connected to the system and it shows the correct capacity (or it shows the data via pop up in Explorer), but then unmounts randomly, then it is likely a bad sector issue. The flash chip(s) is degraded. Need to clone it with more advanced equipment that can deal with bad sectors, ideally a read-only equipment.

If the flash drive has the connector broken or bent in any kind of way, then it is possible, as pointed above in other posts, that it is an electronics issue as well.

Chip off recovery by a specialist could be an option, though typically chip off recovery on SanDisk can be a nightmare due to encryption or strange XOR.

_________________
Hard Disk Drive, SSD, USB Drive and RAID Data Recovery Specialist in Massachusetts


Top
 Profile  
 
 Post subject: Re: Sandisk Cruzer 8GB recognized by OS but cant format or m
PostPosted: March 5th, 2019, 3:17 
Offline
User avatar

Joined: December 4th, 2012, 1:35
Posts: 3294
Location: Adelaide, Australia
if you plug it in and it appears then disappears.. does it reappear if you gently push USB up or down? this indicates a bad or broken solder joint.

can you provide high res pics of both sides of PCB?


Top
 Profile  
 
 Post subject: Re: Sandisk Cruzer 8GB recognized by OS but cant format or m
PostPosted: March 5th, 2019, 4:37 
Offline

Joined: January 8th, 2008, 5:21
Posts: 872
Location: uk
I would also try plugging the device in to other pc's or laptops. Sometimes a failing or faulty out of spec device might draw more current than the usb port can supply. You could also try using a powered usb hub.


Top
 Profile  
 
 Post subject: Re: Sandisk Cruzer 8GB recognized by OS but cant format or m
PostPosted: March 18th, 2019, 10:30 
Offline

Joined: August 11th, 2010, 19:00
Posts: 145
Location: Portugal
try drive cleanup with a known good usb port

run as admin

https://www.majorgeeks.com/files/details/drivecleanup.html


Top
 Profile  
 
 Post subject: Re: Sandisk Cruzer 8GB recognized by OS but cant format or m
PostPosted: March 18th, 2019, 11:25 
Offline
User avatar

Joined: February 9th, 2009, 16:13
Posts: 2184
Location: Ontario, Canada
I have a similar case where the DeepSpar USB stabilizer and, amazingly enough, MRT DE together allowed me to get the device cloned without my having to manually restart everything every few seconds.

_________________
Luke
RAID Data Recovery


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 7 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group