$ dmesg | grep -i ata5
[    5.277082] ata5: SATA max UDMA/133 abar m2048@0xc0404000 port 0xc0404300 irq 27
[    5.771902] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    5.780979] ata5.15: Port Multiplier 1.2, 0x197b:0x0562 r0, 2 ports, feat 0x5/0xf
[    5.788476] ata5.00: hard resetting link
[    6.294126] ata5.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[    6.296352] ata5.01: hard resetting link
[    7.337944] ata5.01: failed to resume link (SControl 0)
[    7.340164] ata5.01: SATA link down (SStatus 0 SControl 0)
[    7.348327] ata5.00: ATA-8: ST2000DL004 HD204UI, 1AQ10001, max UDMA/133
[    7.350321] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 32), AA
[    7.358542] ata5.00: configured for UDMA/133
[    7.360599] ata5: EH complete
[   15.117920] ata5.00: failed to read SCR 1 (Emask=0x40)
[   15.119764] ata5.01: failed to read SCR 1 (Emask=0x40)
[   15.121558] ata5.00: exception Emask 0x100 SAct 0x100000 SErr 0x0 action 0x6 frozen
[   15.125207] ata5.00: failed command: READ FPDMA QUEUED
[   15.127167] ata5.00: cmd 60/00:a0:00:00:00/01:00:00:00:00/40 tag 20 ncq dma 131072 in
[   15.134895] ata5.00: status: { DRDY }
[   20.657921] ata5.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[   20.660301] ata5.00: hard resetting link
[   21.701929] ata5.00: failed to resume link (SControl 0)
[   21.704309] ata5.00: SATA link down (SStatus 0 SControl 0)
[   22.745930] ata5.01: failed to resume link (SControl 0)
[   22.748320] ata5.01: SATA link down (SStatus 0 SControl 0)
[   26.881898] ata5.00: hard resetting link
[   27.921932] ata5.00: failed to resume link (SControl 0)
[   27.924236] ata5.00: SATA link down (SStatus 0 SControl 0)
[   33.025909] ata5.00: hard resetting link
[   34.065943] ata5.00: failed to resume link (SControl 0)
[   34.068187] ata5.00: SATA link down (SStatus 0 SControl 0)
[   34.070265] ata5.00: disabled
[   34.086519] ata5: EH complete
[   34.092982] ata5.00: detaching (SCSI 4:0:0:0)
[  164.439860] ata5.00: failed to read SCR 1 (Emask=0x40)
[  164.439990] ata5.01: failed to read SCR 1 (Emask=0x40)
[  165.150848] ata5.15: SATA link down (SStatus 0 SControl 300)
[  168.319253] ata5.15: qc timeout (cmd 0xe4)
[  168.319369] ata5.15: failed to read PMP GSCR[0] (Emask=0x4)
[  168.319494] ata5.15: PMP revalidation failed (errno=-5)
[  180.208233] ata5.15: softreset failed (device not ready)
[  182.540369] ata5.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[  183.024672] ata5.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[  184.064465] ata5.01: failed to resume link (SControl 0)
[  184.064829] ata5.01: SATA link down (SStatus 0 SControl 0)
[  184.071149] ata5.00: ATA-8: ST2000DL004 HD204UI, 1AQ10001, max UDMA/133
[  184.071263] ata5.00: 3907029168 sectors, multi 0: LBA48 NCQ (depth 32), AA
[  184.077605] ata5.00: configured for UDMA/133
[  218.228139] ata5.00: failed to read SCR 1 (Emask=0x40)
[  218.230238] ata5.01: failed to read SCR 1 (Emask=0x40)
[  218.232275] ata5.00: exception Emask 0x100 SAct 0x40000 SErr 0x0 action 0x6 frozen
[  218.236249] ata5.00: failed command: READ FPDMA QUEUED
[  218.238317] ata5.00: cmd 60/08:90:4f:28:02/00:00:00:00:00/40 tag 18 ncq dma 4096 in
[  218.246741] ata5.00: status: { DRDY }
[  223.771886] ata5.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[  223.774333] ata5.00: hard resetting link
[  224.815852] ata5.00: failed to resume link (SControl 0)
[  224.818315] ata5.00: SATA link down (SStatus 0 SControl 0)
[  225.859805] ata5.01: failed to resume link (SControl 0)
[  225.862275] ata5.01: SATA link down (SStatus 0 SControl 0)
[  230.015542] ata5.00: hard resetting link
[  231.055520] ata5.00: failed to resume link (SControl 0)
[  231.057985] ata5.00: SATA link down (SStatus 0 SControl 0)
[  236.159178] ata5.00: hard resetting link
[  237.199167] ata5.00: failed to resume link (SControl 0)
[  237.201433] ata5.00: SATA link down (SStatus 0 SControl 0)
[  237.203568] ata5.00: disabled
[  237.220064] ata5: EH complete
[  237.226616] ata5.00: detaching (SCSI 4:0:0:0)
[  253.575310] ata5.00: failed to read SCR 1 (Emask=0x40)
[  253.578217] ata5.01: failed to read SCR 1 (Emask=0x40)
[  253.580981] ata5.15: limiting SATA link speed to 1.5 Gbps
[  254.302049] ata5.15: SATA link down (SStatus 0 SControl 310)
[  257.405783] ata5.15: qc timeout (cmd 0xe4)
[  257.408001] ata5.15: failed to read PMP GSCR[0] (Emask=0x4)
[  257.410205] ata5.15: PMP revalidation failed (errno=-5)
[  259.644060] ata5.15: SATA link down (SStatus 0 SControl 310)
[  262.781375] ata5.15: qc timeout (cmd 0xe4)
[  262.783456] ata5.15: failed to read PMP GSCR[0] (Emask=0x4)
[  262.785584] ata5.15: PMP revalidation failed (errno=-5)
[  264.984055] ata5.15: SATA link down (SStatus 0 SControl 310)
[  268.160973] ata5.15: qc timeout (cmd 0xe4)
[  268.163033] ata5.15: failed to read PMP GSCR[0] (Emask=0x4)
[  268.165094] ata5.15: PMP revalidation failed (errno=-5)
[  270.327170] ata5.15: SATA link down (SStatus 0 SControl 310)
[  273.536561] ata5.15: qc timeout (cmd 0xe4)
[  273.538672] ata5.15: failed to read PMP GSCR[0] (Emask=0x4)
[  273.540791] ata5.15: PMP revalidation failed (errno=-5)
[  275.672166] ata5.15: SATA link down (SStatus 0 SControl 310)
[  278.912143] ata5.15: qc timeout (cmd 0xe4)
[  278.914080] ata5.15: failed to read PMP GSCR[0] (Emask=0x4)
[  278.915946] ata5.15: PMP revalidation failed (errno=-5)
[  278.917806] ata5.15: failed to recover PMP after 5 tries, giving up
[  278.919724] ata5.15: Port Multiplier detaching
[  278.921576] ata5.00: disabled
[  281.014316] ata5: SATA link down (SStatus 0 SControl 300)