So, I used gparted to format the drive with a single ext4 partition, rebooted the system, mounted it, and the errors came back.
It's not a hardware issue. It's some combination of the OS, chipset, file system in use, and maybe (?) drive type. I can use the same drive on a Gigabyte board that uses the B85 chipset and have zero issues, so it doesn't seem to be the entire lynx point chipset family. The Z87 on this board is the revised C2 stepping. Anecdotal evidence from web searches might indicate some relation to ASrock Z87 boards in particular, but then, user reports of the error go back several years, and earlier reports were oftentimes hardware issues. And obviously, in the case of the initial bug report here, it was a Macbook Pro. I'm attaching dmesg output from the same system, this is from a fresh boot to a live environment and mounting the drive by clicking it in nautilus. The errors were back, just as they were before. After reinstalling the Windows 8 Trial on the system, it's back to working without any errors in a live ubuntu environment. Not really sure what to make of this, aside from it not being a hardware problem. ** Attachment added: "dmesg-errors.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1318218/+attachment/4296899/+files/dmesg-errors.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1318218 Title: SATA problems on MacBook Pro 11,1? Status in linux package in Ubuntu: Confirmed Bug description: I installed Ubuntu 14.04 next to MacOS following the guide at https://help.ubuntu.com/community/MacBookPro11-1/Saucy/ Looking into dmesg, I constantlz get entries like [ 276.380934] ata1: SError: { PHYRdyChg } [ 276.380943] ata1: hard resetting link [ 277.103527] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 277.103999] ata1.00: unexpected _GTF length (8) [ 277.104504] ata1.00: unexpected _GTF length (8) [ 277.104507] ata1.00: configured for UDMA/33 [ 277.104629] ata1: EH complete [ 277.206319] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen [ 277.206328] ata1: irq_stat 0x00400000, PHY RDY changed [ 277.206333] ata1: SError: { PHYRdyChg } [ 277.206343] ata1: hard resetting link [ 277.927757] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 277.928425] ata1.00: unexpected _GTF length (8) [ 277.929040] ata1.00: unexpected _GTF length (8) [ 277.929051] ata1.00: configured for UDMA/33 [ 277.929168] ata1: EH complete [ 278.030944] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen [ 278.030952] ata1: irq_stat 0x00400000, PHY RDY changed [ 278.030957] ata1: SError: { PHYRdyChg } [ 278.030965] ata1: hard resetting link [ 278.752008] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 278.752582] ata1.00: unexpected _GTF length (8) [ 278.753140] ata1.00: unexpected _GTF length (8) [ 278.753147] ata1.00: configured for UDMA/33 [ 278.753231] ata1: EH complete [ 278.853417] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen [ 278.853424] ata1: irq_stat 0x00400000, PHY RDY changed [ 278.853427] ata1: SError: { PHYRdyChg } [ 278.853434] ata1: hard resetting link [ 279.576258] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 279.576881] ata1.00: unexpected _GTF length (8) [ 279.577417] ata1.00: unexpected _GTF length (8) [ 279.577427] ata1.00: configured for UDMA/33 [ 279.577491] ata1: EH complete [ 279.677753] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen [ 279.677762] ata1: irq_stat 0x00400000, PHY RDY changed [ 279.677767] ata1: SError: { PHYRdyChg } [ 279.677776] ata1: hard resetting link [ 280.400449] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 280.401147] ata1.00: unexpected _GTF length (8) [ 280.401722] ata1.00: unexpected _GTF length (8) [ 280.401733] ata1.00: configured for UDMA/33 [ 280.401809] ata1: EH complete [ 280.502117] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen [ 280.502127] ata1: irq_stat 0x00400000, PHY RDY changed [ 280.502132] ata1: SError: { PHYRdyChg } ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.47 ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: markus 1663 F.... pulseaudio /dev/snd/controlC1: markus 1663 F.... pulseaudio CurrentDesktop: Unity Date: Sat May 10 19:33:44 2014 HibernationDevice: RESUME=UUID=c71381d2-e2f3-4c96-94ea-57b8986afd08 InstallationDate: Installed on 2014-05-09 (0 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: Apple Inc. MacBookPro11,1 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=7584bc70-893a-4291-a1cb-4680f5e09d22 ro libata.force=noncq quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/29/2013 dmi.bios.vendor: Apple Inc. dmi.bios.version: MBP111.88Z.0138.B03.1310291227 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-189A3D4F975D5FFC dmi.board.vendor: Apple Inc. dmi.board.version: MacBookPro11,1 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-189A3D4F975D5FFC dmi.modalias: dmi:bvnAppleInc.:bvrMBP111.88Z.0138.B03.1310291227:bd10/29/2013:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC: dmi.product.name: MacBookPro11,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. 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