Fedora 15 and USB Device

Today I encountered a strange problem with fedora-15. When I plugged-in USB disk to my laptop, the USB disk failed to auto-mount and showed error “Unable to mount device, Input/Output Error”. I tried to mount manually in terminal using:

#sudo mount -t vfat --rw /dev/sdb1 /media

It showed me no error and mount the USB disk also, but when I was trying to copy any directory or file in mounted USB disk, it showed error that the disk is read-only. I searched some forums and websites and found a solution that since the disk was formatted with FAT partition so I should format the disk in Windows first then try to mount the disk again in fedora 15. Although I didn’t have any Windows machine, but anyhow I managed a Windows system to format the USB disk. But I was still facing the same problem.

I tried to list the device using fdisk utility and it showed me nothing mischievous.

 #sudo fdisk -l /dev/sdb
 Disk /dev/sdb: 2034 MB, 2034236416 bytes
 63 heads, 62 sectors/track, 1017 cylinders, total 3973118 sectors
 Units = sectors of 1 * 512 = 512 bytes
 Sector size (logical/physical): 512 bytes / 512 bytes
 I/O size (minimum/optimal): 512 bytes / 512 bytes
 Disk identifier: 0x0000f124
Device Boot Start End Blocks Id System
 /dev/sdb1 * 62 3972401 1986170 b W95 FAT32

Then I found a wired solution on a website. According to that solution, I should umount the disk improperly( without ejecting or Safely remove). Then I should re-insert the disk. I tried that solution also and magic happened. It worked perfectly for me.


About bijolianabhi

Graduate from Engineering College Bikaner, India in 2010 and working as Open Source activist. I love programming and implementing interesting ideas. I have interest in Mozilla Firefox extension development. I am currently learning basics of python to develop some interesting applications.
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