The SATA driver doesn't appear to be entire stable, for whatever reason. There have been a couple of anecdotal reports of file system corruption and the occasional error dumped on the console (error dumps appended here).

I have no idea what could be causing this (or even if it's totally normal)...

The errors I got were:

[ 116.050000] ata1.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x6 frozen
[ 116.060000] ata1.00: failed command: WRITE FPDMA QUEUED
[ 116.070000] ata1.00: cmd 61/08:00:b0:1e:e4/00:00:06:00:00/40 tag 0 ncq 4096 out
[ 116.070000] res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 116.080000] ata1.00: status: { DRDY }

...followed by:

[ 116.890000] ata1.00: status: { DRDY }
[ 116.900000] ata1: hard resetting link
[ 117.370000] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 117.700000] ata1.00: configured for UDMA/100
[ 117.710000] ata1.00: device reported invalid CHS sector 0
[ 117.720000] ata1.00: device reported invalid CHS sector 0
...repeated for several seconds...
[ 118.020000] ata1: EH complete

And then it was fine. And a bit later I got:

[ 368.570000] ata1.00: exception Emask 0x12 SAct 0x2 SErr 0x1280500 action 0x6 frozen
[ 368.580000] ata1.00: irq_stat 0x08000000, interface fatal error
[ 368.590000] ata1: SError: { UnrecovData Proto 10B8B BadCRC TrStaTrns }
[ 368.600000] ata1.00: failed command: READ FPDMA QUEUED
[ 368.610000] ata1.00: cmd 60/a8:08:08:6d:65/00:00:06:00:00/40 tag 1 ncq 86016 in
[ 368.610000] res 40/00:0c:08:6d:65/00:00:06:00:00/40 Emask 0x12 (ATA bus error)
[ 368.620000] ata1.00: status: { DRDY }
[ 368.630000] ata1: hard resetting link
[ 369.170000] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 369.530000] ata1.00: configured for UDMA/100
[ 369.540000] ata1: EH complete

Another list member got:

<3>ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 frozen
[51815.040000] ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 frozen
<3>ata1.00: failed command: WRITE FPDMA QUEUED
[51815.050000] ata1.00: failed command: WRITE FPDMA QUEUED
<3>ata1.00: cmd 61/08:00:88:97:08/00:00:1e:00:00/40 tag 0 ncq 4096 out
res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[51815.060000] ata1.00: cmd 61/08:00:88:97:08/00:00:1e:00:00/40 tag 0
ncq 4096 out
[51815.060000] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask
0x4 (timeout)
<3>ata1.00: status: { DRDY }
[51815.070000] ata1.00: status: { DRDY }
<6>ata1: hard resetting link
<6>ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
<6>ata1.00: configured for UDMA/133
<4>ata1.00: device reported invalid CHS sector 0
[51815.440000] ata1.00: device reported invalid CHS sector 0
<6>ata1: EH complete
<6>kmemleak: 15 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
<6>kmemleak: 12 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
<3>ata1.00: exception Emask 0x10 SAct 0xfc SErr 0x280100 action 0x6 frozen
[101718.400000] ata1.00: exception Emask 0x10 SAct 0xfc SErr 0x280100
action 0x6 frozen
<3>ata1.00: irq_stat 0x08000000, interface fatal error
[101718.410000] ata1.00: irq_stat 0x08000000, interface fatal error
<3>ata1: SError: { UnrecovData 10B8B BadCRC }
[101718.420000] ata1: SError: { UnrecovData 10B8B BadCRC }
<3>ata1.00: failed command: READ FPDMA QUEUED
[101718.430000] ata1.00: failed command: READ FPDMA QUEUED
<3>ata1.00: cmd 60/08:10:10:9c:19/00:00:02:00:00/40 tag 2 ncq 4096 in
res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask 0x10 (ATA bus error)
[101718.430000] ata1.00: cmd 60/08:10:10:9c:19/00:00:02:00:00/40 tag 2
ncq 4096 in
[101718.430000] res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask
0x10 (ATA bus error)
<3>ata1.00: status: { DRDY }
[101718.440000] ata1.00: status: { DRDY }
<3>ata1.00: failed command: READ FPDMA QUEUED
[101718.450000] ata1.00: failed command: READ FPDMA QUEUED
<3>ata1.00: cmd 60/08:18:18:9c:19/00:00:02:00:00/40 tag 3 ncq 4096 in
res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask 0x10 (ATA bus error)
[101718.460000] ata1.00: cmd 60/08:18:18:9c:19/00:00:02:00:00/40 tag 3
ncq 4096 in
[101718.460000] res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask
0x10 (ATA bus error)
<3>ata1.00: status: { DRDY }
[101718.470000] ata1.00: status: { DRDY }
<3>ata1.00: failed command: READ FPDMA QUEUED
[101718.480000] ata1.00: failed command: READ FPDMA QUEUED
<3>ata1.00: cmd 60/08:20:20:9c:19/00:00:02:00:00/40 tag 4 ncq 4096 in
res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask 0x10 (ATA bus error)
[101718.490000] ata1.00: cmd 60/08:20:20:9c:19/00:00:02:00:00/40 tag 4
ncq 4096 in
[101718.490000] res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask
0x10 (ATA bus error)
<3>ata1.00: status: { DRDY }
[101718.500000] ata1.00: status: { DRDY }
<3>ata1.00: failed command: READ FPDMA QUEUED
[101718.510000] ata1.00: failed command: READ FPDMA QUEUED
<3>ata1.00: cmd 60/08:28:28:9c:19/00:00:02:00:00/40 tag 5 ncq 4096 in
res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask 0x10 (ATA bus error)
[101718.520000] ata1.00: cmd 60/08:28:28:9c:19/00:00:02:00:00/40 tag 5
ncq 4096 in
[101718.520000] res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask
0x10 (ATA bus error)
<3>ata1.00: status: { DRDY }
[101718.530000] ata1.00: status: { DRDY }
<3>ata1.00: failed command: READ FPDMA QUEUED
[101718.530000] ata1.00: failed command: READ FPDMA QUEUED
<3>ata1.00: cmd 60/08:30:30:9c:19/00:00:02:00:00/40 tag 6 ncq 4096 in
res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask 0x10 (ATA bus error)
[101718.540000] ata1.00: cmd 60/08:30:30:9c:19/00:00:02:00:00/40 tag 6
ncq 4096 in
[101718.540000] res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask
0x10 (ATA bus error)
<3>ata1.00: status: { DRDY }
[101718.550000] ata1.00: status: { DRDY }
<3>ata1.00: failed command: READ FPDMA QUEUED
[101718.560000] ata1.00: failed command: READ FPDMA QUEUED
<3>ata1.00: cmd 60/08:38:38:9c:19/00:00:02:00:00/40 tag 7 ncq 4096 in
res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask 0x10 (ATA bus error)
[101718.570000] ata1.00: cmd 60/08:38:38:9c:19/00:00:02:00:00/40 tag 7
ncq 4096 in
[101718.570000] res 40/00:3c:38:9c:19/00:00:02:00:00/40 Emask
0x10 (ATA bus error)
<3>ata1.00: status: { DRDY }
[101718.580000] ata1.00: status: { DRDY }
<6>ata1: hard resetting link
<6>ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
<6>ata1.00: configured for UDMA/133
<6>ata1: EH complete