I've seen a similar question arround here, but it doesn't solve my problem, because is a diferent problem.
I have an external hard disk and it works fine, but after a while being mounted and working fine, it gets unmounted and the related output of dmesg is as follows,
[22653.465263] usb 1-6: USB disconnect, device number 3
[22654.341275] Buffer I/O error on device sdb1, logical block 5851506
[22654.341285] Buffer I/O error on device sdb1, logical block 5851507
[22654.341290] Buffer I/O error on device sdb1, logical block 5851508
[22654.341295] Buffer I/O error on device sdb1, logical block 5851509
[22654.341300] Buffer I/O error on device sdb1, logical block 5851506
[22654.472971] Buffer I/O error on device sdb1, logical block 5851506
[22654.474689] Buffer I/O error on device sdb1, logical block 55417728
[22654.474698] Buffer I/O error on device sdb1, logical block 55417728
[22654.488099] Buffer I/O error on device sdb1, logical block 55417728
[22654.625318] Buffer I/O error on device sdb1, logical block 15213709
[22655.852960] usb 1-6: new high-speed USB device number 4 using ehci_hcd
[22655.986631] usb 1-6: New USB device found, idVendor=0bc2, idProduct=2300
[22655.986636] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[22655.986639] usb 1-6: Product: Portable
[22655.986641] usb 1-6: Manufacturer: Seagate
[22655.986644] usb 1-6: SerialNumber: 2GH1D7N9
[22655.995937] scsi7 : usb-storage 1-6:1.0
[22656.997526] scsi 7:0:0:0: Direct-Access Seagate Portable 0130 PQ: 0 ANSI: 4
[22656.999376] sd 7:0:0:0: [sdc] 488397168 512-byte logical blocks: (250 GB/232 GiB)
[22657.001473] sd 7:0:0:0: [sdc] Write Protect is off
[22657.001478] sd 7:0:0:0: [sdc] Mode Sense: 2f 08 00 00
[22657.002044] sd 7:0:0:0: [sdc] No Caching mode page present
[22657.002049] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[22657.006538] sd 7:0:0:0: [sdc] No Caching mode page present
[22657.006545] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[22657.064746] sdc: sdc1
[22657.068549] sd 7:0:0:0: [sdc] No Caching mode page present
[22657.068555] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[22657.068560] sd 7:0:0:0: [sdc] Attached SCSI disk
[22661.658006] quiet_error: 23 callbacks suppressed
[22661.658012] Buffer I/O error on device sdb1, logical block 15752430
[22661.658115] Buffer I/O error on device sdb1, logical block 15752435
[22661.809572] Buffer I/O error on device sdb1, logical block 15752430
and it goes on. I reinstalled the system a while ago and before that, it worked perfectly.
My system is Debian Wheezy up to date, and the disk is a Seagate of 250 GB (I don't know the model). I should add that I wasn't reading or writing stuff to the disk at the time of the issue.
Thanks in advance!
Edit: The device is mounted at the start of the system, and the line in fstab is as follows,
UUID=1678E1CC78E1AB27 /media/Expansion\040Drive ntfs-3g auto,user,rw,uid=1000,umask=077 0 0
I've read somewhere that some hard disks go to sleep mode after a while, when not used and while the usb port is on, the hard disk is sleeping. Could this be my problem? And if so, how can I correct it?