عند تثبيت Ubuntu 14.01 توقف عند Preparing to install؟

أحاول تثبيت Ubuntu 14.04 على Dell 5110، لكن العملية توقفت عند مرحلة Preparing to install، وحصلت على الخطأ التالي:

Sep 25 16:28:15 ubuntu kernel: [  237.686513] ata1.00: irq_stat 0x40000008
Sep 25 16:28:15 ubuntu kernel: [  237.686522] ata1.00: failed command: READ FPDMA QUEUED
Sep 25 16:28:15 ubuntu kernel: [  237.686535] ata1.00: cmd 60/01:d0:4e:58:31/00:00:29:00:00/40 tag 26 ncq 512 in
Sep 25 16:28:15 ubuntu kernel: [  237.686535]          res 41/40:01:4e:58:31/00:00:29:00:00/00 Emask 0x409 (media error) <F>
Sep 25 16:28:15 ubuntu kernel: [  237.686541] ata1.00: status: { DRDY ERR }
Sep 25 16:28:15 ubuntu kernel: [  237.686546] ata1.00: error: { UNC }
Sep 25 16:28:15 ubuntu kernel: [  237.746707] ata1.00: configured for UDMA/133
Sep 25 16:28:15 ubuntu kernel: [  237.746747] sd 0:0:0:0: [sda] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Sep 25 16:28:15 ubuntu kernel: [  237.746755] sd 0:0:0:0: [sda] Sense Key : Medium Error [current] [descriptor]
Sep 25 16:28:15 ubuntu kernel: [  237.746761] sd 0:0:0:0: [sda] Add. Sense: Unrecovered read error - auto reallocate failed
Sep 25 16:28:15 ubuntu kernel: [  237.746765] sd 0:0:0:0: [sda] CDB: 
Sep 25 16:28:15 ubuntu kernel: [  237.746769] Read(10): 28 00 29 31 58 4e 00 00 01 00
Sep 25 16:28:15 ubuntu kernel: [  237.746788] blk_update_request: I/O error, dev sda, sector 691099726
Sep 25 16:28:15 ubuntu kernel: [  237.746798] Buffer I/O error on dev sda6, logical block 6293582, async page read
Sep 25 16:28:15 ubuntu kernel: [  237.746840] ata1: EH complete
Sep 25 16:28:15 ubuntu kernel: [  240.241475] ata1.00: exception Emask 0x0 SAct 0xf SErr 0x0 action 0x0
Sep 25 16:28:15 ubuntu kernel: [  240.241495] ata1.00: irq_stat 0x40000008
Sep 25 16:28:15 ubuntu kernel: [  240.241500] ata1.00: failed command: READ FPDMA QUEUED  

ما سبب المشكل؟ وكيف يمكنني تجاوز هذا المشكل؟