USB key issues: Unable to stop drive and Read only file system

[adummy]

Every time when I right click the USB drive icon and select "Safely remove drive" I always get this error message
Unable to stop drive

Error detaching: helper exited with exit code 1: Detaching device /dev/sdc
USB device: /sys/devices/pci0000:00/0000:00:04.1/usb2/2-4)
SYNCHRONIZE CACHE: synchronize cache(10): Fixed format, current; Sense key: Key=9
Additional sense: Logical unit not ready, cause not reportable
Info fld=0x0 [0]
FAILED: No such file or directory
(Continuing despite SYNCHRONIZE CACHE failure.)
STOP UNIT: start stop unit: transport: Host_status=0x07 [DID_ERROR]
Driver_status=0x00 [DRIVER_OK, SUGGEST_OK]

FAILED: No such file or directory
even though the icon does disappear from the desk top. :confused:
I have been ignoring it since the USB drive seems working fine.

Now I have a more serious problem. When I tried to copy files onto the USB drive it says "read only file system" and doesn't let me. I tried unplug and plug the USB key but that doesn't help. :(

[mikewhatever]

When was the last time you've run a file system check on it? Do you know what file system is there?
Can you post the output of sudo fdisk -l with the device attached.

[adummy]

When was the last time you've run a file system check on it? Do you know what file system is there?
Can you post the output of sudo fdisk -l with the device attached.

Here you go:

last_lba(): I don't know how to handle files with mode 40700File system is FAT32 - is this compatible with ubuntu?

Windows chkdsk did find a bunch of errors and fixed them with /f option. After the fix the ubuntu fdisk still gives the same "I don't know" message and "safely remove disk" still gives the error message. Help!

[mikewhatever]

If the file system check doesn't solve it, formatting may help. Just backup the files before formatting. Both fat32 and ntfs, Windows file systems, work in Linux.

[adummy]

If the file system check doesn't solve it, formatting may help. Just backup the files before formatting. Both fat32 and ntfs, Windows file systems, work in Linux.

Thanks but I would avoid formatting if possible though. It works fine on Windows PCs. I just did chkdsk two more time, both OK. I copied and binary compared some files in between the two, all OK. Safely removed from the Windows PC no problem. Any other suggestions to check on the ubuntu side?

[michopop]

the same problem on nokia 5230 with a 16 gb sd card! any other solution then formating?