[Bug 35054] Re: Cannot mount FAT partitions

[Osmo Laitinen]

I have this same problem also, it started to occur after upgrading to Ubuntu 9.10. 
It happens very often after attaching my mp3 player (Trextor Cebrax), after a few minutes usb's filesystem becomes read-only and file transfers with Nautilus naturally stops.

if I manually mount mp3 player as root, there hasn't been any problems.

Here's dmesg:

[ 2428.916016] usb 4-1: new full speed USB device using uhci_hcd and address 2
[ 2430.316050] hub 4-0:1.0: unable to enumerate USB device on port 1
[ 2432.392015] usb 4-1: new full speed USB device using uhci_hcd and address 3
[ 2435.704579] usb 4-1: configuration #1 chosen from 1 choice
[ 2435.749975] Initializing USB Mass Storage driver...
[ 2435.751153] scsi2 : SCSI emulation for USB Mass Storage devices
[ 2435.751423] usb-storage: device found at 3
[ 2435.751429] usb-storage: waiting for device to settle before scanning
[ 2435.751454] usbcore: registered new interface driver usb-storage
[ 2435.751460] USB Mass Storage support registered.
[ 2440.758679] usb-storage: device scan complete
[ 2440.769307] scsi 2:0:0:0: Direct-Access     TrekStor i.Beat cebrax FM 0100 PQ: 0 ANSI: 4
[ 2440.770382] sd 2:0:0:0: Attached scsi generic sg2 type 0
[ 2440.782284] sd 2:0:0:0: [sdb] 1001088 2048-byte logical blocks: (2.05 GB/1.90 GiB)
[ 2440.785449] sd 2:0:0:0: [sdb] Write Protect is off
[ 2440.785458] sd 2:0:0:0: [sdb] Mode Sense: 3e 00 00 00
[ 2440.785464] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 2440.799358] sd 2:0:0:0: [sdb] 1001088 2048-byte logical blocks: (2.05 GB/1.90 GiB)
[ 2440.802251] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 2440.802261]  sdb: sdb1
[ 2440.821466] sd 2:0:0:0: [sdb] 1001088 2048-byte logical blocks: (2.05 GB/1.90 GiB)
[ 2440.828565] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 2440.828579] sd 2:0:0:0: [sdb] Attached SCSI removable disk
[ 2511.659888] FAT: Filesystem error (dev sdb1)
[ 2511.659898]     fat_bmap_cluster: request beyond EOF (i_pos 47251481)
[ 2511.659906]     File system has been set read-only

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Cannot mount FAT partitions
https://bugs.launchpad.net/bugs/35054
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