I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.

You might be lucky and a cap has gone SC. More often the controller
chip is dead.

--
Best Regards:
Baron.

Meat Plow wrote in :

On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrote:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.

You might be lucky and a cap has gone SC. More often the controller
chip is dead.

Well one of the most common (non physical abuse) problem is corruption
of the file system since there is a unique read/write algorithm used
to spread the usage of the file system over the entire flash memory.

but his drive is not even recognized by the PC.


Unfortunately this isn't something that can be recovered from by the
average person.




--
Jim Yanik
jyanik
at
kua.net

gave me a USB overcurrent message and now the drive no longer works.


Did anyone get the memo?

This is like trying to do a recovery on a hard drive after it's been on the
drill press.

Meat Plow wrote in
:

On 18 Jun 2009 16:26:58 GMT, Jim Yanik wrote:

Meat Plow wrote in
:

On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrote:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and
the LED does not flash. When it was last connected to a cpu, the
screen gave me a USB overcurrent message and now the drive no
longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown?
I've looked it over and don't recognize one. There's a osc
crystal, a couple of IC's and several trans/caps/res units.

You might be lucky and a cap has gone SC. More often the controller
chip is dead.

Well one of the most common (non physical abuse) problem is
corruption of the file system since there is a unique read/write
algorithm used to spread the usage of the file system over the
entire flash memory.

but his drive is not even recognized by the PC.

It won't be if there is not a recognizable file system.

hard drives are recognized even if they are brand new and no file system.
other USB devices get recognized without "recognizable file systems".



Unfortunately this isn't something that can be recovered from by the
average person.




--
Jim Yanik
jyanik
at
kua.net

Meat Plow wrote in :

On 19 Jun 2009 14:33:01 GMT, Jim Yanik wrote:

Meat Plow wrote in
:

On 18 Jun 2009 16:26:58 GMT, Jim Yanik wrote:

Meat Plow wrote in
:

On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrote:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and
the LED does not flash. When it was last connected to a cpu, the
screen gave me a USB overcurrent message and now the drive no
longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown?
I've looked it over and don't recognize one. There's a osc
crystal, a couple of IC's and several trans/caps/res units.

You might be lucky and a cap has gone SC. More often the controller
chip is dead.

Well one of the most common (non physical abuse) problem is
corruption of the file system since there is a unique read/write
algorithm used to spread the usage of the file system over the
entire flash memory.

but his drive is not even recognized by the PC.

It won't be if there is not a recognizable file system.

hard drives are recognized even if they are brand new and no file system.

Yep

other USB devices get recognized without "recognizable file systems".

Yep.

And your point is what? That if other USB devices and hard drives get
recognized as hardware with no file systems this should hold true for
everything you plug into a USB port?

I suppose that's the average assumption.


so when does a USB device NOT get recognized as hardware when plugged into
a USB port? How's that work??

(under Windows,not some other op system)

--
Jim Yanik
jyanik
at
kua.net

On 20 Jun 2009 16:30:49 GMT, Jim Yanik wrote:

so when does a USB device NOT get recognized as hardware when plugged into
a USB port? How's that work??

(under Windows,not some other op system)

When it's just powered by the 5VDC on the USB jack. My LED night
light runs on USB power and doesn't get recognized by Windoze. Same
with my USB massager:
http://www.usbgeek.com/prod_detail.php?prod_id=0081
However, a USB memory device will need to be recognized by Windoze in
order to work, so my examples don't really count.

I wonder if Windoze will recognize this USB device?
http://gizmodo.com/5232951/usb-vibrator-brings-bodily-fluids-a-bit-too-close-to-your-ports

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Meat Plow wrote in
:

On 20 Jun 2009 16:30:49 GMT, Jim Yanik wrote:

Meat Plow wrote in
:

On 19 Jun 2009 14:33:01 GMT, Jim Yanik wrote:

Meat Plow wrote in
:

On 18 Jun 2009 16:26:58 GMT, Jim Yanik wrote:

Meat Plow wrote in
:

On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrot e:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized
by computers. I've tried it in several and they do not see it
and the LED does not flash. When it was last connected to a
cpu, the screen gave me a USB overcurrent message and now the
drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be
blown? I've looked it over and don't recognize one. There's a
osc crystal, a couple of IC's and several trans/caps/res
units.

You might be lucky and a cap has gone SC. More often the
controller chip is dead.

Well one of the most common (non physical abuse) problem is
corruption of the file system since there is a unique read/write
algorithm used to spread the usage of the file system over the
entire flash memory.

but his drive is not even recognized by the PC.

It won't be if there is not a recognizable file system.

hard drives are recognized even if they are brand new and no file
system.

Yep

other USB devices get recognized without "recognizable file
systems".

Yep.

And your point is what? That if other USB devices and hard drives
get recognized as hardware with no file systems this should hold
true for everything you plug into a USB port?

I suppose that's the average assumption.


so when does a USB device NOT get recognized as hardware when plugged
into a USB port? How's that work??

When it fails to communicate with the hotplug/automount hal daemon. Do
you think a USB flash drive Fairy sees your device being plugged in
then flips a magic switch inside your PC?

IOW,you have NO answer,and don't know. You should man up and just say so.

(under Windows,not some other op system)

Actually now it's done the same way in Linux and should be the same in
any OS running a hald with hotplug.

And no it doesn't hold true for everything plugged into a USB port,

Eveything that's a PC I/O USB device.(stuff that's MEANT for a PC to use.)
Not the power tappers like Lieberman cited.

just a NAND or NOR type EEPROM flash drive that was asked of in the
original subject.




--
Jim Yanik
jyanik
at
kua.net

On Sat, 20 Jun 2009 09:16:16 -0400, Meat Plow
put finger to keyboard and composed:

And your point is what? That if other USB devices and hard drives get
recognized as hardware with no file systems this should hold true for
everything you plug into a USB port?

I suppose that's the average assumption.

AIUI, this MS utility will retrieve information from any USB device,
file system or no file system, even without any drivers being
installed:

http://www.users.on.net/~fzabkar/USB...VCView.x86.exe

The device also reports its maximum rated current demand.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Mon, 29 Jun 2009 19:26:59 +1000 Franc Zabkar
wrote in Message id:
:

On Sat, 20 Jun 2009 09:16:16 -0400, Meat Plow
put finger to keyboard and composed:

And your point is what? That if other USB devices and hard drives get
recognized as hardware with no file systems this should hold true for
everything you plug into a USB port?

I suppose that's the average assumption.

AIUI, this MS utility will retrieve information from any USB device,
file system or no file system, even without any drivers being
installed:

http://www.users.on.net/~fzabkar/USB...VCView.x86.exe

The device also reports its maximum rated current demand.

Nice little program, hard to believe it was written by MS.
Thanks.

Meat Plow wrote:
On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrote:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.
You might be lucky and a cap has gone SC. More often the controller
chip is dead.

Well one of the most common (non physical abuse) problem is corruption
of the file system since there is a unique read/write algorithm used
to spread the usage of the file system over the entire flash memory.

Probably the most common fault I've seen is a result of physical abuse,
and that is minute cracks in the print or soldered joints where the USB
connector meets the pcb. Repairable in some cases tho it requires the
touch of a midwife to be successful.

Ron

Ron wrote:

Meat Plow wrote:
On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrote:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the
screen gave me a USB overcurrent message and now the drive no
longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown?
I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.
You might be lucky and a cap has gone SC. More often the controller
chip is dead.

Well one of the most common (non physical abuse) problem is
corruption of the file system since there is a unique read/write
algorithm used to spread the usage of the file system over the entire
flash memory.

Probably the most common fault I've seen is a result of physical
abuse, and that is minute cracks in the print or soldered joints where
the USB connector meets the pcb. Repairable in some cases tho it
requires the touch of a midwife to be successful.

Ron

Yes I would agree with that synopsis ! However the OP reported an "Over
Current Event" Which suggests SC rather than cracks caused by flexing.
Those would tend to cause intermittent loss of recognition !

--
Best Regards:
Baron.

On Thu, 18 Jun 2009 22:23:23 +0100, Baron
put finger to keyboard and
composed:

However the OP reported an "Over Current Event" Which suggests SC ..

There looks to be a 3-terminal linear 3.3V (?) regulator at the rear
of the PCB in this example:

http://upload.wikimedia.org/wikipedi...x-DSCN0411.JPG

I wonder if it could be a possible suspect.

BTW, the NAND flash memory IC, K9K2G08U0M, is a 3.3V part:

http://www.datasheetarchive.com/pdf-.../DSA-86237.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Franc Zabkar wrote:

On Thu, 18 Jun 2009 22:23:23 +0100, Baron
put finger to keyboard and
composed:

However the OP reported an "Over Current Event" Which suggests SC ..

There looks to be a 3-terminal linear 3.3V (?) regulator at the rear
of the PCB in this example:


http://upload.wikimedia.org/wikipedi...x-DSCN0411.JPG

I wonder if it could be a possible suspect.

BTW, the NAND flash memory IC, K9K2G08U0M, is a 3.3V part:


http://www.datasheetarchive.com/pdf-.../DSA-86237.pdf

- Franc Zabkar

If that device is indeed a 3.3V regulator it would definitely be
suspect. In the dead ones I've played around with there has never been
any markings to identify the small components.

--
Best Regards:
Baron.

"Ron" wrote in message
...
Meat Plow wrote:
On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrote:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.
You might be lucky and a cap has gone SC. More often the controller
chip is dead.

Well one of the most common (non physical abuse) problem is corruption
of the file system since there is a unique read/write algorithm used
to spread the usage of the file system over the entire flash memory.

Probably the most common fault I've seen is a result of physical abuse,
and that is minute cracks in the print or soldered joints where the USB
connector meets the pcb. Repairable in some cases tho it requires the
touch of a midwife to be successful.

Ron

I mean really! The poster cited a USB overcurrent message. Do we really
need to guess what kind of flash drive would give an overcurrent message. I
could see this kind of thing with a portable Hard Drive. Gee, why not try
plugging it into one of the rear ports and see if it will pull the power
supply down? Lol! I like the joke about "too close to bodily fluids!"
Something about Cruisers and Hot Pockets!

Meat Plow wrote:
On Wed, 17 Jun 2009 23:02:20 +0100, Baron
wrote:

wmson364 wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.
You might be lucky and a cap has gone SC. More often the controller
chip is dead.

Well one of the most common (non physical abuse) problem is corruption
of the file system since there is a unique read/write algorithm used
to spread the usage of the file system over the entire flash memory.

"Write-leveling"

Unfortunately this isn't something that can be recovered from by the
average person.

You wouldn't want to anyway, because it doesn't happen until most of the
memory cells have worn out.


--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

On Fri, 19 Jun 2009 14:18:02 +1000, Bob Larter
put finger to keyboard and composed:

Meat Plow wrote:

Well one of the most common (non physical abuse) problem is corruption
of the file system since there is a unique read/write algorithm used
to spread the usage of the file system over the entire flash memory.

"Write-leveling"

I've always seen it called "wear leveling".

http://en.wikipedia.org/wiki/Wear_leveling

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Franc Zabkar wrote:
On Fri, 19 Jun 2009 14:18:02 +1000, Bob Larter
put finger to keyboard and composed:

Meat Plow wrote:

Well one of the most common (non physical abuse) problem is corruption
of the file system since there is a unique read/write algorithm used
to spread the usage of the file system over the entire flash memory.

"Write-leveling"

I've always seen it called "wear leveling".

http://en.wikipedia.org/wiki/Wear_leveling

Yep, my mistake.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

"wmson364" wrote in message
...
I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.

If you don't have critical files on that flash drive, forget it. My last
purchase of Cruzers (4 GB each) was only about $33 for three of them.

If you do have critical files that you need to get back, may God be with
you.

You might have done something that corrupted the RAM. (I did this to one by
accident.) If this is the case, it's unlikely you'll be able to get it
working again.

On Wed, 17 Jun 2009 14:27:16 -0700 (PDT), wmson364
wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers.

Was it setup with an encrypted filesystem? If so, try to reinstall
the Secure utilities (which won't work if you can't access the drive):
http://hk-ie.sandisk.com/Retail/Default.aspx?CatID=1345

I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

It's melted into a solid blob of silicon. Give up.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.

Just for fun, try testing the flash drive:
http://hk-ie.sandisk.com/Retail/Default.aspx?CatID=1354

Jeff Liebermann wrote in
news
On Wed, 17 Jun 2009 14:27:16 -0700 (PDT), wmson364
wrote:

I have a 2 gb Cruzer flash drive that is no longer recognized by
computers.

Was it setup with an encrypted filesystem? If so, try to reinstall
the Secure utilities (which won't work if you can't access the drive):
http://hk-ie.sandisk.com/Retail/Default.aspx?CatID=1345

I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

It's melted into a solid blob of silicon. Give up.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.

Just for fun, try testing the flash drive:
http://hk-ie.sandisk.com/Retail/Default.aspx?CatID=1354



it's possible the controller IC has failed.
I have an Attache flash drive with a transparent case,you can see two large
ICs;one is the memory IC and one the controller.

--
Jim Yanik
jyanik
at
kua.net

On 18 Jun 2009 13:06:23 GMT, Jim Yanik wrote:

it's possible the controller IC has failed.
I have an Attache flash drive with a transparent case,you can see two large
ICs;one is the memory IC and one the controller.

Actually, there's another possibility. It might be a counterfeit
flash drive.
http://reviews.ebay.com/BEWARE-of-FAKE-16GB-32GB-64GB-USB-Flash-Drives-on-eBay_W0QQugidZ10000000001236200
In the past, I've run into various flash drives and camera cards that
were counterfeit. They didn't last. A few were dead on arrival.
Looks like the Sandisk Cruzer drive is a candidate:
http://reviews.ebay.com/FAKE-SanDisk-Cruzer-USB-Flash-Drives-Exposed_W0QQugidZ10000000001236054

Topic drift: I've been testing the speed of flash drives with
FDBench. It works but isn't really very useful. Most of the hard
disk benchmark utilities don't seem to recognize a flash drive as a
hard disk. Is there a Windoze program for benchmarking flash drives?

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann wrote:

On 18 Jun 2009 13:06:23 GMT, Jim Yanik wrote:


it's possible the controller IC has failed.
I have an Attache flash drive with a transparent case,you can see two large
ICs;one is the memory IC and one the controller.


Actually, there's another possibility. It might be a counterfeit
flash drive.
http://reviews.ebay.com/BEWARE-of-FAKE-16GB-32GB-64GB-USB-Flash-Drives-on-eBay_W0QQugidZ10000000001236200
In the past, I've run into various flash drives and camera cards that
were counterfeit. They didn't last. A few were dead on arrival.
Looks like the Sandisk Cruzer drive is a candidate:
http://reviews.ebay.com/FAKE-SanDisk-Cruzer-USB-Flash-Drives-Exposed_W0QQugidZ10000000001236054

Topic drift: I've been testing the speed of flash drives with
FDBench. It works but isn't really very useful. Most of the hard
disk benchmark utilities don't seem to recognize a flash drive as a
hard disk. Is there a Windoze program for benchmarking flash drives?


Well, I remember having lots of options in SisSoft's 'Sandra'; just checked on
the Web and indeed it has flash drive benchmarks. It's big, but even as
paranoid as I am, I found that it doesn't muck up the system and is pretty
open and transparent during and after installation.

Michael

On Thu, 18 Jun 2009 10:01:55 -0700 Jeff Liebermann
wrote in Message id: :

Topic drift: I've been testing the speed of flash drives with
FDBench. It works but isn't really very useful. Most of the hard
disk benchmark utilities don't seem to recognize a flash drive as a
hard disk. Is there a Windoze program for benchmarking flash drives?

Try this freeware utility: http://www.steelbytes.com/?mid=20 This works
great with just about any disk drive. Note that the write tests are
destructive, so back up your data.

On Fri, 19 Jun 2009 05:13:56 -0400, JW wrote:

On Thu, 18 Jun 2009 10:01:55 -0700 Jeff Liebermann
wrote in Message id: :

Topic drift: I've been testing the speed of flash drives with
FDBench. It works but isn't really very useful. Most of the hard
disk benchmark utilities don't seem to recognize a flash drive as a
hard disk. Is there a Windoze program for benchmarking flash drives?

Try this freeware utility: http://www.steelbytes.com/?mid=20 This works
great with just about any disk drive. Note that the write tests are
destructive, so back up your data.

Ummm... Looks like exactly what I need. However, when I downloaded it
from the USA, German, and AUS sites, AVG 8.5 complained that it was
infected with WIN32/HEUR virus. SuperAntiSpyware, MalwareBytes, and
Spybot S&D didn't find anything wrong, so I think it's a false
positive. However, I don't wanna try running it on this machine as
the backups are about 2 months old. I'll try it later on some other
machine. Thanks.

wmson364 wrote:
I have a 2 gb Cruzer flash drive that is no longer recognized by
computers. I've tried it in several and they do not see it and the
LED does not flash. When it was last connected to a cpu, the screen
gave me a USB overcurrent message and now the drive no longer works.

Its no longer under warranty so...
Does the circuit board have a "fuse" on it that could be blown? I've
looked it over and don't recognize one. There's a osc crystal, a
couple of IC's and several trans/caps/res units.

Sounds like one of the chips/caps has shorted out. Throw it in the bin &
get a new one.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------