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Flash disk problem

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Special Forums Hardware Filesystems, Disks and Memory Flash disk problem
# 1  
Old 09-19-2009
Question Flash disk problem
Hi,
I have USB flash drive.
I have formated this one on windows
( fdisk /dev/sdb showed me that this is WIN95 FAT32 )
ok

When I tried to copy some data from /media/cdrecord I get IO error.
and dvice automaticly unmount.
And kernel Oops is called:
Code:
CPU:    0
EIP:    0060:[<c0553041>]    Not tainted VLI
EFLAGS: 00010202   (2.6.21-1.3194.fc7 #1)
EIP is at make_class_name+0x27/0x7a
eax: 00000000   ebx: ffffffff   ecx: ffffffff   edx: 0000000b
esi: f8913368   edi: 00000000   ebp: 00000000   esp: f7c53e5c
ds: 007b   es: 007b   fs: 00d8  gs: 0000  ss: 0068
Process khubd (pid: 164, ti=f7c53000 task=f7c6c230 task.ti=f7c53000)
Stack: d9cd5e0c d9cd5e04 f8921040 f8920fc0 d9cd5e0c c055318d 00000000 d9cd5e04 
       e2e59400 00000246 e2e59000 c0553217 d9cd5c00 f89091a8 d9cd5c00 e2e59400 
       f8906e5e e2e59430 e2e59400 f890239b e2e596fc ed10f618 f8cd2b60 f8cc6769 
Call Trace:
 [<c055318d>] class_device_del+0x9d/0x11f
 [<c0553217>] class_device_unregister+0x8/0x10
 [<f89091a8>] __scsi_remove_device+0x1d/0x60 [scsi_mod]
 [<f8906e5e>] scsi_forget_host+0x2d/0x4a [scsi_mod]
 [<f890239b>] scsi_remove_host+0x65/0xd6 [scsi_mod]
 [<f8cc6769>] storage_disconnect+0xe/0x16 [usb_storage]
 [<c0569da2>] usb_unbind_interface+0x44/0x85
 [<c05527f7>] __device_release_driver+0x6e/0x8b
 [<c0552c49>] device_release_driver+0x32/0x48
 [<c055223f>] bus_remove_device+0x6a/0x7a
 [<c05509b7>] device_del+0x14c/0x1ad
 [<c05679f8>] usb_disable_device+0x5c/0xbb
 [<c05648d1>] usb_disconnect+0x97/0x123
 [<c0565595>] hub_thread+0x37b/0xa6e
 [<c0436e71>] autoremove_wake_function+0x0/0x35
 [<c056521a>] hub_thread+0x0/0xa6e
 [<c0436da8>] kthread+0xb0/0xd8
 [<c0436cf8>] kthread+0x0/0xd8
 [<c0405b3f>] kernel_thread_helper+0x7/0x10
 =======================


And I tried put off and agin put into usb slot this flash drive
and after this I get in dmesg:

Code:
sd 7:0:0:0: Attached scsi removable disk sdc
sd 7:0:0:0: Attached scsi generic sg2 type 0
sdc : READ CAPACITY failed.
sdc : status=0, message=00, host=1, driver=00 
sdc : sense not available. 
sdc: Write Protect is off
sdc: Mode Sense: 00 00 00 00
sdc: assuming drive cache: write through
sdc : READ CAPACITY failed.
sdc : status=0, message=00, host=1, driver=00 
sdc : sense not available. 
sdc: Write Protect is off
sdc: Mode Sense: 00 00 00 00
sdc: assuming drive cache: write through
sdc : READ CAPACITY failed.
sdc : status=0, message=00, host=1, driver=00 
sdc : sense not available. 
sdc: Write Protect is off
sdc: Mode Sense: 00 00 00 00
sdc: assuming drive cache: write through
sdc : READ CAPACITY failed.
sdc : status=0, message=00, host=1, driver=00 
sdc : sense not available. 
sdc: Write Protect is off
sdc: Mode Sense: 00 00 00 00
sdc: assuming drive cache: write through
scsi 6:0:0:0: rejecting I/O to dead device
scsi 6:0:0:0: rejecting I/O to dead device
FAT: Directory bread(block 15632) failed
scsi 6:0:0:0: rejecting I/O to dead device
FAT: Directory bread(block 15633) failed
scsi 6:0:0:0: rejecting I/O to dead device
FAT: Directory bread(block 15634) failed
scsi 6:0:0:0: rejecting I/O to dead device
(....)

Is anybody who know what it's going on with my flash ?
# 2  
Old 09-21-2009
A kernel oops is very bad. That shouldn't happen under normal circumstances, or even under most abnormal circumstances really. Have you rebooted your system since then? It might need one to resume normal operation, a kernel oops can shut down things you need to do this, if not lock your system up completely.

What is your system, anyway?
# 3  
Old 09-28-2009
I suppose I mean this look like this flash memory is broken. I tried restart the system many times. When I turn on other flash disk evrything is ok.

My system is
Linux localhost.localdomain 2.6.21-1.3194.fc7 #1 SMP Wed May 23 22:35:01 EDT 2007 i686 i686 i386 GNU/Linux

I know that oops is not very good situation but maybe there is some solution or way to fix my flash. I tried
fsck.vfat
and this not work.
I tried to reformat this flash disk but still no effect.

Maybe somebody know a way or tools to "debug" flash memory and to fix it.
# 4  
Old 10-06-2009
I can only guess, but from the stack trace it looks like the device is removing itself when being written to, or the kernel thinks it is.
# 5  
Old 10-12-2009
I bought new flash memory. I think that this is the one of the best solution in this situation Smilie but if anybody know what can I do to bring up my old flash please tell me.
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