Input/Output error while playing video

I am using Linux Mint 15. Nowadays I am getting Input/Output error while watching movies. Sometimes when I copy/paste, I get the same error. What should I do? I have a laptop so unable to check inside the machine. If the hard disk is corrupt, how to take the backup as I am unable to copy/paste the data.

Edit- The VLC error message is -

File reading failed: VLC could not read the file (Input/output error)

The system logs are below

Sep 26 21:08:30 gambler kernel: [ 6038.411430] ata1.00: exception Emask 0x0 SAct     0x7fffffff SErr 0x0 action 0x0
Sep 26 21:08:30 gambler kernel: [ 6038.411434] ata1.00: irq_stat 0x40000008
Sep 26 21:08:30 gambler kernel: [ 6038.411438] ata1.00: failed command: READ FPDMA QUEUED
Sep 26 21:08:30 gambler kernel: [ 6038.411444] ata1.00: cmd 60/08:00:d0:85:b1/00:00:15:00:00/40 tag 0 ncq 4096 in
Sep 26 21:08:30 gambler kernel: [ 6038.411444]          res 41/40:00:d0:85:b1/00:00:15:00:00/40 Emask 0x409 (media error) <F>
Sep 26 21:08:30 gambler kernel: [ 6038.411448] ata1.00: status: { DRDY ERR }
Sep 26 21:08:30 gambler kernel: [ 6038.411450] ata1.00: error: { UNC }
Sep 26 21:08:30 gambler ntfs-3g[2726]: ntfs_attr_pread_i: ntfs_pread failed: Input/output error
Sep 26 21:08:30 gambler ntfs-3g[2726]: ntfs_attr_pread error reading '/Dexter.1x07.Circle.Of.Friends.HDTV.XviD-LOL.[tvu.org.ru].avi' at offset 229416960: 4096 <> -1: Input/output error
Sep 26 21:08:30 gambler kernel: [ 6038.430101] ata1.00: configured for UDMA/100
Sep 26 21:08:30 gambler kernel: [ 6038.430139] sd 0:0:0:0: [sda] Unhandled sense code
Sep 26 21:08:30 gambler kernel: [ 6038.430144] sd 0:0:0:0: [sda]  
Sep 26 21:08:30 gambler kernel: [ 6038.430147] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Sep 26 21:08:30 gambler kernel: [ 6038.430151] sd 0:0:0:0: [sda]  
Sep 26 21:08:30 gambler kernel: [ 6038.430154] Sense Key : Medium Error [current] [descriptor]
Sep 26 21:08:30 gambler kernel: [ 6038.430161] Descriptor sense data with sense descriptors (in hex):
Sep 26 21:08:30 gambler kernel: [ 6038.430164]         72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 
Sep 26 21:08:30 gambler kernel: [ 6038.430183]         15 b1 85 d0 
Sep 26 21:08:30 gambler kernel: [ 6038.430192] sd 0:0:0:0: [sda]  
Sep 26 21:08:30 gambler kernel: [ 6038.430199] Add. Sense: Unrecovered read error - auto reallocate failed
Sep 26 21:08:30 gambler kernel: [ 6038.430203] sd 0:0:0:0: [sda] CDB: 
Sep 26 21:08:30 gambler kernel: [ 6038.430211] Read(10): 28 00 15 b1 85 d0 00 00 08 00
Sep 26 21:08:30 gambler kernel: [ 6038.430221] end_request: I/O error, dev sda, sector 363955664
Sep 26 21:08:30 gambler kernel: [ 6038.430225] Buffer I/O error on device sda3, logical block 6553274
Sep 26 21:08:30 gambler kernel: [ 6038.430258] ata1: EH complete