From Kern.log:
Mar 21 21:57:22 ubuntu kernel: [ 20.788412] end_request: I/O error, dev fd0, sector 0 Mar 21 21:57:22 ubuntu kernel: [ 32.869106] end_request: I/O error, dev fd0, sector 0 Mar 21 21:57:22 ubuntu kernel: [ 32.869109] Buffer I/O error on device fd0, logical block 0
Mar 21 21:57:22 ubuntu kernel: [ 2209.279269] end_request: I/O error, dev fd0, sector 0 Mar 21 21:57:22 ubuntu kernel: [ 2209.279271] Buffer I/O error on device fd0, logical block 0
Look at the times.
From Kern.log:
Mar 21 21:57:22 ubuntu kernel: [ 20.788412] end_request: I/O error, dev fd0, sector 0
Mar 21 21:57:22 ubuntu kernel: [ 32.869106] end_request: I/O error, dev fd0, sector 0
Mar 21 21:57:22 ubuntu kernel: [ 32.869109] Buffer I/O error on device fd0, logical block 0
Mar 21 21:57:22 ubuntu kernel: [ 2209.279269] end_request: I/O error, dev fd0, sector 0
Mar 21 21:57:22 ubuntu kernel: [ 2209.279271] Buffer I/O error on device fd0, logical block 0
Look at the times.