LinuxQuestions.org - USB flash drive problems in FC3.

I have a SanDisk 512MB Cruzer USB Micro flash drive which gives me the following problems in FC3.

After umounting the device using 'umount /mnt/usb' pulling the device produces dmesg output:

Code:

SELinux: initialized (dev sda1, type vfat), uses genfs_contexts

usb 1-4: USB disconnect, address 7

ehci_hcd 0000:00:1d.7: qh 40429080 (#0) state 1

sda : READ CAPACITY failed.

sda : status=0, message=00, host=7, driver=00

sda : sense not available.

sda: Write Protect is off

sda: Mode Sense: 00 00 00 00

sda: assuming drive cache: write through

scsi5 (0:0): rejecting I/O to dead device

scsi5 (0:0): rejecting I/O to dead device

scsi5 (0:0): rejecting I/O to dead device

scsi5 (0:0): rejecting I/O to dead device

sda : READ CAPACITY failed.

sda : status=0, message=00, host=0, driver=04

sda : sense not available.

scsi5 (0:0): rejecting I/O to dead device

sda: Write Protect is off

sda: Mode Sense: 00 00 00 00

sda: assuming drive cache: write through

sda:<3>scsi5 (0:0): rejecting I/O to dead device

Buffer I/O error on device sda, logical block 0

scsi5 (0:0): rejecting I/O to dead device

Buffer I/O error on device sda, logical block 0

scsi5 (0:0): rejecting I/O to dead device

Buffer I/O error on device sda, logical block 262143

scsi5 (0:0): rejecting I/O to dead device

Buffer I/O error on device sda, logical block 262143

scsi5 (0:0): rejecting I/O to dead device

Buffer I/O error on device sda, logical block 0

unable to read partition table

When the device is reconnected I get the following dmesg output:

Code:

usb 1-4: new high speed USB device using address 8

scsi6 : SCSI emulation for USB Mass Storage devices

 Vendor: SanDisk  Model: Cruzer Micro      Rev: 2033

 Type:  Direct-Access                      ANSI SCSI revision: 02

SCSI device sda: 1024000 512-byte hdwr sectors (524 MB)

usb 1-4: control timeout on ep0in

And then I am unable to mount the device. The only solution I have found is to reboot the machine.

As a side note, When I first attach the usb drive, I have a removable disk icon appear on my desktop. If I then umount the drive and pull it the icon is removed. If I then re-connect the usb drive again, the icon does not appear... I have a feeling that I am not correctly removing the device.. Is there something more than umount-ing it required? On windows machines, I if I ask to 'safely remove' the device, the light on the flash drive goes out before I remove it. On Linux I have not found a way to make the light go off before I remove the drive, can this be done?

Cheers..