On 5/9/2017 2:24 PM, Styma, Robert (Nokia - US/Phoenix) wrote: > You mention this is a USB drive. Input/output error means something is wrong. Possibly seriously. > > The blkid command should tell you if this is a FAT32 file system or some flavor of file system. It will also tell you the device being mounted. Eg. /dev/sdc1 > > If it is FAT32, you would want to unmount it and plug it into a Windows box and run chkdsk or scandsk on it. If it has been formatted to a Linux type file system, unmount it and use fsck to scan the disk for errors with a command similar to "fsck /dev/sdc1". Again blkid or "df -k -l" will tell you the device name. Make sure the device is unmounted when you run fsck or bad things will happen to your data. > > You might also want to try "smartctl -a /dev/sdc" > This will give you warnings if the disk is beginning to fail. > Again, I am using /dev/sdc as an example. also, dmesg | grep sdc to see what physical errors were logged. (replacing sdc with whatever the physical device name is, without any partition number). -- john r pierce, recycling bits in santa cruz