Public bug reported:

I have many errors in file /var/log/kern.log.1
21 00:24:43 krot-PC kernel: [  120.865170] ata1.01: exception Emask 0x50 SAct 
0x0 SErr 0x280900 action 0x0 frozen
Nov 21 00:24:43 krot-PC kernel: [  120.865173] ata1.01: SError: { UnrecovData 
HostInt 10B8B BadCRC }
Nov 21 00:24:43 krot-PC kernel: [  120.865176] ata1.01: failed command: READ DMA
Nov 21 00:24:43 krot-PC kernel: [  120.865180] ata1.01: cmd 
c8/00:00:d0:50:48/00:00:00:00:00/fb tag 0 dma 131072 in
Nov 21 00:24:43 krot-PC kernel: [  120.865181]          res 
40/00:00:00:4f:c2/00:00:00:00:00/10 Emask 0x74 (host bus error)
Nov 21 00:24:43 krot-PC kernel: [  120.865183] ata1.01: status: { DRDY }
Nov 21 00:24:43 krot-PC kernel: [  120.865188] ata1.00: hard resetting link
Nov 21 00:24:43 krot-PC kernel: [  121.184520] ata1.01: hard resetting link
Nov 21 00:24:43 krot-PC kernel: [  121.660563] ata1.00: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:24:43 krot-PC kernel: [  121.660577] ata1.01: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:24:43 krot-PC kernel: [  121.692715] ata1.00: configured for UDMA/133
Nov 21 00:24:43 krot-PC kernel: [  121.700746] ata1.01: configured for UDMA/133
Nov 21 00:24:43 krot-PC kernel: [  121.700751] ata1.01: device reported invalid 
CHS sector 0
Nov 21 00:24:43 krot-PC kernel: [  121.700759] ata1: EH complete
Nov 21 00:25:34 krot-PC kernel: [  171.872515] ata1: lost interrupt (Status 
0x51)
Nov 21 00:25:34 krot-PC kernel: [  171.872531] ata1.01: exception Emask 0x50 
SAct 0x0 SErr 0x280900 action 0x0 frozen
Nov 21 00:25:34 krot-PC kernel: [  171.872535] ata1.01: SError: { UnrecovData 
HostInt 10B8B BadCRC }
Nov 21 00:25:34 krot-PC kernel: [  171.872539] ata1.01: failed command: READ DMA
Nov 21 00:25:34 krot-PC kernel: [  171.872546] ata1.01: cmd 
c8/00:00:30:0e:4d/00:00:00:00:00/fb tag 0 dma 131072 in
Nov 21 00:25:34 krot-PC kernel: [  171.872547]          res 
40/00:00:00:4f:c2/00:00:00:00:00/10 Emask 0x74 (host bus error)
Nov 21 00:25:34 krot-PC kernel: [  171.872550] ata1.01: status: { DRDY }
Nov 21 00:25:34 krot-PC kernel: [  171.872558] ata1.00: hard resetting link
Nov 21 00:25:34 krot-PC kernel: [  172.192519] ata1.01: hard resetting link
Nov 21 00:25:34 krot-PC kernel: [  172.668567] ata1.00: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:25:34 krot-PC kernel: [  172.668580] ata1.01: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:25:34 krot-PC kernel: [  172.700718] ata1.00: configured for UDMA/133
Nov 21 00:25:34 krot-PC kernel: [  172.712237] ata1.01: configured for UDMA/133
Nov 21 00:25:34 krot-PC kernel: [  172.712242] ata1.01: device reported invalid 
CHS sector 0
Nov 21 00:25:34 krot-PC kernel: [  172.712249] ata1: EH complete
Nov 21 00:27:10 krot-PC kernel: [  267.872514] ata1: lost interrupt (Status 
0x51)
Nov 21 00:27:10 krot-PC kernel: [  267.872527] ata1.01: exception Emask 0x50 
SAct 0x0 SErr 0x280900 action 0x0 frozen
Nov 21 00:27:10 krot-PC kernel: [  267.872530] ata1.01: SError: { UnrecovData 
HostInt 10B8B BadCRC }
Nov 21 00:27:10 krot-PC kernel: [  267.872532] ata1.01: failed command: READ DMA
Nov 21 00:27:10 krot-PC kernel: [  267.872536] ata1.01: cmd 
c8/00:00:20:9b:4d/00:00:00:00:00/fb tag 0 dma 131072 in
Nov 21 00:27:10 krot-PC kernel: [  267.872537]          res 
40/00:00:00:4f:c2/00:00:00:00:00/10 Emask 0x74 (host bus error)
Nov 21 00:27:10 krot-PC kernel: [  267.872539] ata1.01: status: { DRDY }
Nov 21 00:27:10 krot-PC kernel: [  267.872545] ata1.00: hard resetting link
Nov 21 00:27:10 krot-PC kernel: [  268.192517] ata1.01: hard resetting link
Nov 21 00:27:10 krot-PC kernel: [  268.668060] ata1.00: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:27:10 krot-PC kernel: [  268.668071] ata1.01: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:27:10 krot-PC kernel: [  268.700740] ata1.00: configured for UDMA/133
Nov 21 00:27:10 krot-PC kernel: [  268.708741] ata1.01: configured for UDMA/133
Nov 21 00:27:10 krot-PC kernel: [  268.708746] ata1.01: device reported invalid 
CHS sector 0
Nov 21 00:27:10 krot-PC kernel: [  268.708753] ata1: EH complete
Nov 21 00:28:00 krot-PC kernel: [  318.370028] ata1: lost interrupt (Status 
0x51)
Nov 21 00:28:00 krot-PC kernel: [  318.370048] ata1.01: limiting SATA link 
speed to 1.5 Gbps
Nov 21 00:28:00 krot-PC kernel: [  318.370052] ata1.01: exception Emask 0x50 
SAct 0x0 SErr 0x280900 action 0x0 frozen
Nov 21 00:28:00 krot-PC kernel: [  318.370057] ata1.01: SError: { UnrecovData 
HostInt 10B8B BadCRC }
Nov 21 00:28:00 krot-PC kernel: [  318.370061] ata1.01: failed command: READ DMA
Nov 21 00:28:00 krot-PC kernel: [  318.370067] ata1.01: cmd 
c8/00:00:c0:94:4a/00:00:00:00:00/fb tag 0 dma 131072 in
Nov 21 00:28:00 krot-PC kernel: [  318.370074]          res 
40/00:00:00:4f:c2/00:00:00:00:00/10 Emask 0x74 (host bus error)
Nov 21 00:28:00 krot-PC kernel: [  318.370076] ata1.01: status: { DRDY }
Nov 21 00:28:00 krot-PC kernel: [  318.370081] ata1.00: hard resetting link
Nov 21 00:28:00 krot-PC kernel: [  318.688018] ata1.01: hard resetting link
Nov 21 00:28:01 krot-PC kernel: [  319.164066] ata1.00: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:28:01 krot-PC kernel: [  319.164080] ata1.01: SATA link up 1.5 Gbps 
(SStatus 113 SControl 310)
Nov 21 00:28:01 krot-PC kernel: [  319.196210] ata1.00: configured for UDMA/133
Nov 21 00:28:01 krot-PC kernel: [  319.204248] ata1.01: configured for UDMA/133
Nov 21 00:28:01 krot-PC kernel: [  319.204253] ata1.01: device reported invalid 
CHS sector 0
Nov 21 00:28:01 krot-PC kernel: [  319.204261] ata1: EH complete
Nov 21 00:28:36 krot-PC kernel: [  354.010080] ata1: lost interrupt (Status 
0x51)
Nov 21 00:28:36 krot-PC kernel: [  354.010099] ata1.01: exception Emask 0x50 
SAct 0x0 SErr 0x280900 action 0x0 frozen
Nov 21 00:28:36 krot-PC kernel: [  354.010104] ata1.01: SError: { UnrecovData 
HostInt 10B8B BadCRC }
Nov 21 00:28:36 krot-PC kernel: [  354.010108] ata1.01: failed command: READ DMA
Nov 21 00:28:36 krot-PC kernel: [  354.010114] ata1.01: cmd 
c8/00:00:f8:7e:37/00:00:00:00:00/fb tag 0 dma 131072 in
Nov 21 00:28:36 krot-PC kernel: [  354.010116]          res 
40/00:00:00:4f:c2/00:00:00:00:00/10 Emask 0x74 (host bus error)
Nov 21 00:28:36 krot-PC kernel: [  354.010119] ata1.01: status: { DRDY }
Nov 21 00:28:36 krot-PC kernel: [  354.010126] ata1.00: hard resetting link
Nov 21 00:28:36 krot-PC kernel: [  354.328518] ata1.01: hard resetting link
Nov 21 00:28:36 krot-PC kernel: [  354.804565] ata1.00: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:28:36 krot-PC kernel: [  354.804578] ata1.01: SATA link up 1.5 Gbps 
(SStatus 113 SControl 310)
Nov 21 00:28:36 krot-PC kernel: [  354.836190] ata1.00: configured for UDMA/133
Nov 21 00:28:36 krot-PC kernel: [  354.844246] ata1.01: configured for UDMA/133
Nov 21 00:28:36 krot-PC kernel: [  354.844251] ata1.01: device reported invalid 
CHS sector 0
Nov 21 00:28:36 krot-PC kernel: [  354.844258] ata1: EH complete
Nov 21 00:29:11 krot-PC kernel: [  388.992521] ata1: lost interrupt (Status 
0x51)
Nov 21 00:29:11 krot-PC kernel: [  388.992541] ata1.01: exception Emask 0x50 
SAct 0x0 SErr 0x280900 action 0x0 frozen
Nov 21 00:29:11 krot-PC kernel: [  388.992546] ata1.01: SError: { UnrecovData 
HostInt 10B8B BadCRC }
Nov 21 00:29:11 krot-PC kernel: [  388.992550] ata1.01: failed command: READ DMA
Nov 21 00:29:11 krot-PC kernel: [  388.992556] ata1.01: cmd 
c8/00:00:60:40:3e/00:00:00:00:00/fb tag 0 dma 131072 in
Nov 21 00:29:11 krot-PC kernel: [  388.992557]          res 
40/00:00:00:4f:c2/00:00:00:00:00/10 Emask 0x74 (host bus error)
Nov 21 00:29:11 krot-PC kernel: [  388.992560] ata1.01: status: { DRDY }
Nov 21 00:29:11 krot-PC kernel: [  388.992567] ata1.00: hard resetting link
Nov 21 00:29:11 krot-PC kernel: [  389.312517] ata1.01: hard resetting link
Nov 21 00:29:11 krot-PC kernel: [  389.792065] ata1.00: SATA link up 3.0 Gbps 
(SStatus 123 SControl 300)
Nov 21 00:29:11 krot-PC kernel: [  389.792077] ata1.01: SATA link up 1.5 Gbps 
(SStatus 113 SControl 310)
Nov 21 00:29:11 krot-PC kernel: [  389.824198] ata1.00: configured for UDMA/133
Nov 21 00:29:11 krot-PC kernel: [  389.832220] ata1.01: configured for UDMA/133
Nov 21 00:29:11 krot-PC kernel: [  389.832223] ata1.01: device reported invalid 
CHS sector 0
Nov 21 00:29:11 krot-PC kernel: [  389.832229] ata1: EH complete

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Hard disk write/read freezes for 5-20 seconds time to time
https://bugs.launchpad.net/bugs/681588
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