Readynas Pro heat issues

Welp. I don't have proof about the Disk 1 shutting down. But here are the temperature alarms:



The CPU fan did not solved it, but it's pushing more air...

Device Description Status
Disk 1 WDC WD20EARX-00PASB0 1863 GB , 33 C / 91 F , Write-cache ON OK
Disk 2 WDC WD20EARX-00PASB0 1863 GB , 32 C / 89 F , Write-cache ON OK
Disk 3 WDC WD20EFRX-68AX9N0 1863 GB , 30 C / 86 F , Write-cache ON OK
Disk 4 WDC WD20EFRX-68AX9N0 1863 GB , 31 C / 87 F , Write-cache ON OK
Disk 5 WDC WD20EZRX-19D8PB0 1863 GB , 31 C / 87 F , Write-cache ON OK
Disk 6 WDC WD20EARX-00PASB0 1863 GB , 30 C / 86 F , Write-cache ON OK
Fan SYS 1493 RPM OK
Fan CPU 1939 RPM OK
Temp SYS 59 C / 138 F [Normal 0-65 C / 32-149 F] OK
Temp CPU 31 C / 87 F [Normal 0-60 C / 32-140 F] OK
UPS 1 APC Back-UPS ES 550, Battery charge: 100%, 17 minutes OK

Will see if I can improve air flow by crimping cables...

EDIT:

Removed the extra connector and crimped the cables. No difference.

So, completely clueless as to what is causing the Temp SYS to go high.