Ik denk dat het hier ergen fout gaat:
.........
Mar 31 15:46:04 ubuntu kernel: [ 27.183508] ata1.00: ATA-6: WDC WD600LB-55DNA0, 77.07W77, max UDMA/100
Mar 31 15:46:04 ubuntu kernel: [ 27.183513] ata1.00: 117231408 sectors, multi 16: LBA48
Mar 31 15:46:04 ubuntu kernel: [ 27.191489] ata1.00: configured for UDMA/100
Mar 31 15:46:04 ubuntu kernel: [ 27.191502] scsi1 : ata_piix
Mar 31 15:46:04 ubuntu kernel: [ 27.678989] ata2.00: ATAPI, max UDMA/33
Mar 31 15:46:04 ubuntu kernel: [ 27.842476] ata2.01: ATAPI, max UDMA/33
Mar 31 15:46:04 ubuntu kernel: [ 28.006463] ata2.00: configured for UDMA/33
Mar 31 15:46:04 ubuntu kernel: [ 57.959373] ata2.01: qc timeout (cmd 0xef)
Mar 31 15:46:04 ubuntu kernel: [ 57.959383] ata2.01: failed to set xfermode (err_mask=0x4)
Mar 31 15:46:04 ubuntu kernel: [ 57.959388] ata2: failed to recover some devices, retrying in 5 secs
Mar 31 15:46:04 ubuntu kernel: [ 63.774755] ata2.00: configured for UDMA/33
Mar 31 15:46:04 ubuntu kernel: [ 93.727649] ata2.01: qc timeout (cmd 0xef)
Mar 31 15:46:04 ubuntu kernel: [ 93.727660] ata2.01: failed to set xfermode (err_mask=0x4)
Mar 31 15:46:04 ubuntu kernel: [ 93.727666] ata2.01: limiting speed to UDMA/33:PIO3
Mar 31 15:46:04 ubuntu kernel: [ 93.727670] ata2: failed to recover some devices, retrying in 5 secs
Mar 31 15:46:04 ubuntu kernel: [ 99.543010] ata2.00: configured for UDMA/33
Mar 31 15:46:04 ubuntu kernel: [ 129.495926] ata2.01: qc timeout (cmd 0xef)
Mar 31 15:46:04 ubuntu kernel: [ 129.495936] ata2.01: failed to set xfermode (err_mask=0x4)
Mar 31 15:46:04 ubuntu kernel: [ 129.495941] ata2.01: disabled
Mar 31 15:46:04 ubuntu kernel: [ 129.495944] ata2: failed to recover some devices, retrying in 5 secs
Mar 31 15:46:04 ubuntu kernel: [ 134.492148] ata2.00: failed to set xfermode (err_mask=0x40)
Mar 31 15:46:04 ubuntu kernel: [ 134.492154] ata2: failed to recover some devices, retrying in 5 secs
Mar 31 15:46:04 ubuntu kernel: [ 140.147773] ata2.00: configured for UDMA/33
Mar 31 15:46:04 ubuntu kernel: [ 140.147932] scsi 0:0:0:0: Direct-Access ATA WDC WD600LB-55DN 77.0 PQ: 0 ANSI: 5
Mar 31 15:46:04 ubuntu kernel: [ 140.150192] scsi 1:0:0:0: CD-ROM PHILIPS DVDR1648P1 P2.4 PQ: 0 ANSI: 5