January 17, 20251 yr Hi, I've scrubbed Unraid forums to the best of my ability but been having an issue I am sure many have faced but could not find exact match or failed to fix it by using suggested fixes in those forum posts. I am talking about this heap of mess Jan 17 02:47:47 Blackfox kernel: ata4.00: exception Emask 0x10 SAct 0x300000 SErr 0x4050000 action 0xe frozen Jan 17 02:47:47 Blackfox kernel: ata4.00: irq_stat 0x00000040, connection status changed Jan 17 02:47:47 Blackfox kernel: ata4: SError: { PHYRdyChg CommWake DevExch } Jan 17 02:47:47 Blackfox kernel: ata4.00: failed command: READ FPDMA QUEUED Jan 17 02:47:47 Blackfox kernel: ata4.00: cmd 60/00:a0:90:8b:92/01:00:4a:00:00/40 tag 20 ncq dma 131072 in Jan 17 02:47:47 Blackfox kernel: res 40/00:70:c0:0f:09/00:00:8f:00:00/40 Emask 0x10 (ATA bus error) Jan 17 02:47:47 Blackfox kernel: ata4.00: status: { DRDY } Jan 17 02:47:47 Blackfox kernel: ata4.00: failed command: READ FPDMA QUEUED Jan 17 02:47:47 Blackfox kernel: ata4.00: cmd 60/00:a8:90:8c:92/01:00:4a:00:00/40 tag 21 ncq dma 131072 in Jan 17 02:47:47 Blackfox kernel: res 40/00:70:c0:0f:09/00:00:8f:00:00/40 Emask 0x10 (ATA bus error) Jan 17 02:47:47 Blackfox kernel: ata4.00: status: { DRDY } Jan 17 02:47:47 Blackfox kernel: ata4: hard resetting link Jan 17 02:47:48 Blackfox kernel: ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300) Jan 17 02:47:48 Blackfox kernel: ata4.00: configured for UDMA/133 Jan 17 02:47:48 Blackfox kernel: ata4: EH complete I've been randomly getting these link resets in my logs for **random** drives as well. There is no consistency to it. Some days there are no errors at all, sometimes one during the day and rarely 2-3+ in succession. I don't notice any effects, no data loss of any kind, parity checks always passed and whatever file I check all seem to be A-OK. Looking at other posts out there, many have suggested checking SATA cables. I re-checked and re-seated all the cables (in the process even once accidentally yanked the cable while system was on so even got to test rebuild from parity :P) and nothing, plus since it happens to random SATA links each time (between 1-4) I don't believe I am so unlucky that all my 4 SATA cables are bad. The only thing I get to latch on here is the fact that `SError` is a bit different than what many other forum posts have and I know they are related to some SATA error codes but this is outside of my domain expertise to fully understand. Anyone has any idea what else I could do/try? This has been going on pretty much since day one I've used UNRAID but again have not noticed any bad side effects but that isn't to say there is no harm in it obviously. diagnostics-20250117-2203.zip
January 19, 20251 yr Author On 1/18/2025 at 9:47 AM, JorgeB said: Any power splitters in use? I am using SATA power cable that came with my PSU (mine is Corsair, picture is just an example). Is that considered a power splitter? Edited January 19, 20251 yr by Icekronik
January 19, 20251 yr Community Expert 11 minutes ago, Icekronik said: Is that considered a power splitter? no
January 19, 20251 yr Community Expert Solution If no splitters are in use, and you have already replaced the cables, it could be just a firmware issue with those disks, I also have some Toshiba disks where the models that start with a common serial show some ATA errors during high load, in any controller. If you don't notice any effects, I would just ignore, next time you need to upgrade a disk, try using one for a different brand/model and then see if that one no longer shows the same issue.
January 19, 20251 yr Author 33 minutes ago, JorgeB said: If no splitters are in use, and you have already replaced the cables, it could be just a firmware issue with those disks, I also have some Toshiba disks where the models that start with a common serial show some ATA errors during high load, in any controller. If you don't notice any effects, I would just ignore, next time you need to upgrade a disk, try using one for a different brand/model and then see if that one no longer shows the same issue. I am using Seagate 4TB NAS Storage https://www.disctech.com/Seagate-ST4000NE001-4TB-SATA-Hard-Drive from my understanding these should have been pretty reliable. Do you have some recommendation going forward or is this just all luck these days? I didn't replace cables so much as re-did the connections shuffling them around. I could of course change all of them but as states the errors happen on all ATA interfaces at random which leads me to believe this can't be all cables being bad I hope... I don't see any bad side effects, just hoping this has no major implications in future. Server been running for 2 years now. Just out of curiosity, what does this error even mean? SError: { PHYRdyChg CommWake DevExch } Edited January 19, 20251 yr by Icekronik
January 19, 20251 yr Community Expert Those errors in general just mean a communication issue, but it then retries.
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