Yup changing the SATA mode to 'Compatibility' solved this issue for me.
No more error logs indicating failed SATA
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https://bugs.launchpad.net/bugs/1247806
Title:
Kernel resetting SATA link
Status in linux package in Ubuntu:
Expired
Bug description:
On Ubuntu 13.10 I encounter kernel reseting SATA link in connection
with temporary system freezes (KDE lags). Such a bug has previously
been reported here
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/888764 for the
same hardware but older software. This behavior has also been reported
here https://lkml.org/lkml/2011/10/26/11 for same hardware and in
connection with unresponsive KDE. For me it occurs if the system is
under high load.
In such situations dmesg says repeatedly:
[23391.818508] ata4: exception Emask 0x10 SAct 0x0 SErr 0x404 action 0xe
frozen
[23391.818513] ata4: irq_stat 0x0040, connection status changed
[23391.818516] ata4: SError: { CommWake DevExch }
[23391.818523] ata4: limiting SATA link speed to 1.5 Gbps
[23391.818525] ata4: hard resetting link
[23392.538993] ata4: SATA link down (SStatus 0 SControl 310)
[23392.554893] ata4: EH complete
Smart does not report any critical errors:
=== START OF INFORMATION SECTION ===
Model Family: Seagate Momentus Thin
Device Model: ST320LT007-9ZV142
Serial Number:W0Q4FQRR
LU WWN Device Id: 5 000c50 04998da73
Firmware Version: 0004LVM1
User Capacity:320'072'933'376 bytes [320 GB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate:7242 rpm
Device is:In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 2.6, 3.0 Gb/s (current: 3.0 Gb/s)
Local Time is:Mon Nov 4 12:55:25 2013 CET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
See vendor-specific Attribute list for marginal Attributes.
General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection:
Disabled.
Self-test execution status: ( 0) The previous self-test routine
completed
without error or no self-test has
ever
been run.
Total time to complete Offline
data collection:(0) seconds.
Offline data collection
capabilities:(0x73) SMART execute Offline immediate.
Auto Offline data collection on/off
support.
Suspend Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities:(0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability:(0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time:( 1) minutes.
Extended self-test routine
recommended polling time:( 63) minutes.
Conveyance self-test routine
recommended polling time:( 2) minutes.
SCT capabilities: (0x303b) SCT Status supported.
SCT Error Recovery Control supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 113 099 034Pre-fail Always
- 55387800
3 Spin_Up_Time0x0003 098 098 000Pre-fail Always
- 0
4 Start_Stop_Count0x0032 100 100 020Old_age Always
- 768
5 Reallocated_Sector_Ct 0x0033 100 100 036Pre-fail Always
- 0
7 Seek_Error_Rate 0x000f 074 060 030Pre-fail Always
- 8647632770
9 Power_On_Hours 0x0032 097 097 000Old_age Always
- 3216
