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The same >> DAS, including the same eSATA cable, works perfectly when connected >> to an older Linksys WRT-1900AC v1 with Marvell Armada XP (MV78230), >> using sata-mv driver. This is the kernel log from the older router: >>=20 >=20 > Sorry to interfering in from the side, but I have observed very similar > behavior with a Marvel 88SE6121 controller (AHCI kernel module): Very > old SATA-1 HDDs (mostly laptop HDDs in my tests) work flawlessly, > SATA-2/3 HDDs consistently fail. Limiting SATA speed (libata.force=3D1.= 5G > ...) does not help. >=20 > Interestingly, SATA-2/3 HDDs do work with U-Boot and 'ancient' 3.x > kernels. There was a suspicion that it was the PCI subsystem (the > change in kernel 3.16 from kirkwood/pci.c to mvebu-pci). Pali Roh=C3=A1= r did > a great job to investigate this problem very persistently, but in the > end we did not find a solution. >=20 > Without knowing anything about this area, there was the assumption that > the problem must be at one of the lower levels close to the hardware. >=20 > You can find all the details and a lot of protocols in Bug > https://bugzilla.kernel.org/show_bug.cgi?id=3D216094 >=20 > I've been trying to revive my NAS440 for over 10 years with all the > components (https://github.com/hn/seagate-blackarmor-nas), so I have > the hardware available and am happy to persevere to try things or > otherwise help. Well, the first thing to do would be to test your system using the latest kernel 6.2-rc5 and see if the problem still exists. If it does, please report the issue. --=20 Damien Le Moal Western Digital Research