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540s 'SError: { UnrecFIS }' on linux boot irregulary

New Contributor

I'am trying to understand the meaning and severe of a totally irregular appearing error during boot according to one of the SSDs connected to my NUC5I5RYH:

New SSD M.2 240GB INTEL SSDSCKKW24 (Modell: 540s), Firmware Version: LSF036C, checked without any errors with Intels SSD Tool (with W10), SMART values unremarkable.

SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03) (prog-if 01 [AHCI 1.0])

CPU: Intel(R) Core(TM) i5-5250U (Broadwell-U)

OS: ArchLinux, 4.8.12-3 x86_64 GNU/Linux

I testet reboot, boot after shutdown and boot after shutdown with power unplugged.

On every ca. fifth to tenth boot I get:


ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300)

ata4.00: ATA-10: INTEL SSDSCKKW240H6, LSF036C, max UDMA/133

ata4.00: 468862128 sectors, multi 16: LBA48 NCQ (depth 31/32), AA

ata4.00: READ LOG DMA EXT failed, trying unqueued

ata4.00: failed to get Identify Device Data, Emask 0x40

ata4.00: configured for UDMA/133

ata4: exception Emask 0x2 SAct 0x0 SErr 0x2000000 action 0x6 frozen t4

ata4: irq_stat 0x00000011, unknown FIS 00478027 a0000830 00000000 08000001

ata4: SError: { UnrecFIS }

ata4: hard resetting link


Perhaps related to former June 2016 031C firmware release which provided the following changes:

* Corrected errant FIS causing BSOD when Write Cache disabled


Esteemed Contributor III

Hello Nadotu,

Thanks for posting in our forum.We would like to take a look into this situation you reported, we will contact our engineering team and we will provide you updates soon.Regards,NC

Esteemed Contributor III

Hi Nadotu,

We are still checking on your case, but in the meantime, could you please let us know if you can confirm the following:-Is the latest BIOS installed on the NUC?-Can you try in a different operating system? (Example: Ubuntu on Linux or any Windows* (7 to 10)-Any way to test the SSD in a total different computer? (hardware and software)Please let us know if you can follow these suggestions, we will be waiting for your response.Regards,NC

New Contributor

Hello NC;

Thank you for your response.

- BIOS was flashed to V. 0360 (latest) before the 540s was added and again after it was added. Issue persisted.

- I unfortunately do not own another device with M.2 slot.

- Will try other OSes soon. Will report back than.



Esteemed Contributor III


Thanks for the prompt response.We will be waiting for you to report us back once you can test any other OS.Regards,NC