Friday 20 November 2015

Acer V3-372 SATA failed command: READ FPDMA QUEUED


Just when you think you got the laptop fixed and running well, I noticed these errors in dmesg:

[    9.998225] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[   10.001522] ata1.00: configured for UDMA/100
[   10.002694] ata1: EH complete
[   10.046132] ata1: limiting SATA link speed to 3.0 Gbps
[   10.047274] ata1.00: exception Emask 0x10 SAct 0x700 SErr 0x280100 action 0x6 frozen
[   10.048415] ata1.00: irq_stat 0x08000000, interface fatal error
[   10.049557] ata1: SError: { UnrecovData 10B8B BadCRC }
[   10.050707] ata1.00: failed command: READ FPDMA QUEUED
[   10.051842] ata1.00: cmd 60/80:40:80:f8:3a/01:00:1c:00:00/40 tag 8 ncq 196608 in
                        res 50/00:50:20:f8:3a/00:00:1c:00:00/40 Emask 0x10 (ATA bus error)
[   10.054118] ata1.00: status: { DRDY }
[   10.055250] ata1.00: failed command: READ FPDMA QUEUED
[   10.056376] ata1.00: cmd 60/38:48:40:f8:3a/00:00:1c:00:00/40 tag 9 ncq 28672 in
                        res 50/00:50:20:f8:3a/00:00:1c:00:00/40 Emask 0x10 (ATA bus error)
[   10.058647] ata1.00: status: { DRDY }
[   10.059759] ata1.00: failed command: READ FPDMA QUEUED
[   10.060883] ata1.00: cmd 60/18:50:20:f8:3a/00:00:1c:00:00/40 tag 10 ncq 12288 in
                        res 50/00:50:20:f8:3a/00:00:1c:00:00/40 Emask 0x10 (ATA bus error)
[   10.063158] ata1.00: status: { DRDY }
[   10.064277] ata1: hard resetting link
[   10.382466] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 320)

Read errors leading to a down-rating of the link to 3Gbps. OK, not the end of the world, but potentially worrying if it portends future data integrity issues.

Having tested this further, I'm able to reproduce the errors when I put the Logitech mouse usb receiver on the usb port on the right of the machine (near the SSD). Putting the receiver on the left side away from the SSD eliminates this problem.

I will check whether it can be fixed with shielding.

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