Comment 13 for bug 1318218

I just installed a fresh Xubuntu 14.04 on an iMac with Fusion drive. I split the Fusion drive to install the ubuntu on the SSD. I now get a lot of very similar errors:

[332951.343902] ata5: irq_stat 0x00400000, PHY RDY changed
[332951.343908] ata5: SError: { PHYRdyChg }
[332951.343916] ata5: hard resetting link
[332952.066052] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
[332952.066683] ata5.00: unexpected _GTF length (8)
[332952.067485] ata5.00: unexpected _GTF length (8)
[332952.067607] ata5.00: configured for UDMA/33
[332952.067726] ata5: EH complete
[332952.167737] ata5: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen

Machine is usable and working fine, though. uname -a yields:
Linux XiMac 3.13.0-30-generic #55-Ubuntu SMP Fri Jul 4 21:40:53 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux