что означают эти строки из /var/log/messages?
Jan 30 23:00:06 localhost kernel: [27244.133860] ata1: exception Emask 0x10 SAct 0x0 SErr 0x90000 action 0xe frozen
Jan 30 23:00:06 localhost kernel: [27244.133865] ata1: irq_stat 0x00400000, PHY RDY changed
Jan 30 23:00:06 localhost kernel: [27244.133869] ata1: SError: { PHYRdyChg 10B8B }
Jan 30 23:00:06 localhost kernel: [27244.133881] ata1: hard resetting link
Jan 30 23:00:12 localhost kernel: [27250.269029] ata1: link is slow to respond, please be patient (ready=0)
Jan 30 23:00:16 localhost kernel: [27254.145031] ata1: COMRESET failed (errno=-16)
Jan 30 23:00:16 localhost kernel: [27254.145038] ata1: hard resetting link
Jan 30 23:00:17 localhost kernel: [27254.868039] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
Jan 30 23:00:17 localhost kernel: [27254.868594] ata1.00: n_sectors mismatch 488397168 != 488395055
Jan 30 23:00:17 localhost kernel: [27254.868598] ata1.00: old n_sectors matches native, probably late HPA lock, will try to unlock HPA
Jan 30 23:00:17 localhost kernel: [27254.868602] ata1.00: revalidation failed (errno=-5)
Jan 30 23:00:22 localhost kernel: [27259.868033] ata1: hard resetting link
Jan 30 23:00:22 localhost kernel: [27260.173036] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
Jan 30 23:00:22 localhost kernel: [27260.174781] ata1.00: configured for UDMA/133
Jan 30 23:00:22 localhost kernel: [27260.174790] ata1: EH complete
Jan 30 23:00:37 localhost kernel: [27275.051866] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
Jan 30 23:00:37 localhost kernel: [27275.051871] ata1: irq_stat 0x00400000, PHY RDY changed
Jan 30 23:00:37 localhost kernel: [27275.051875] ata1: SError: { PHYRdyChg }
Jan 30 23:00:37 localhost kernel: [27275.051887] ata1: hard resetting link
Jan 30 23:00:38 localhost kernel: [27275.774045] ata1: SATA link down (SStatus 0 SControl 310)
Jan 30 23:00:38 localhost kernel: [27276.020186] ata1: hard resetting link
Jan 30 23:00:43 localhost kernel: [27281.374026] ata1: link is slow to respond, please be patient (ready=0)
Jan 30 23:00:44 localhost kernel: [27281.425042] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
Jan 30 23:00:44 localhost kernel: [27281.426800] ata1.00: configured for UDMA/133
Jan 30 23:00:44 localhost kernel: [27281.426809] ata1: EH complete
к тому же давно еще когда-то мне убунта говорила, что пора менять диск, но он работал и работал себе, а это недавно началось вот
сабж.