Samsung 870 EVO SSD limited to 3Gbps SATA link

[synoxpe]

Is anyone getting the full speed with these SSDs? Benchmark is showing half speed, which can by explained by corresponding error messages in e.g. dmesg log:

[Tue Aug  6 21:54:52 2024] ata14.00: exception Emask 0x10 SAct 0x100000 SErr 0x400100 action 0x6 frozen
[Tue Aug  6 21:54:52 2024] ata14.00: irq_stat 0x08000000, interface fatal error
[Tue Aug  6 21:54:52 2024] ata14: SError: { UnrecovData Handshk }
[Tue Aug  6 21:54:52 2024] ata14.00: failed command: WRITE FPDMA QUEUED
[Tue Aug  6 21:54:52 2024] ata14.00: cmd 61/00:a0:00:88:13/02:00:00:00:00/40 tag 20 ncq 262144 out
                                    res 40/00:a0:00:88:13/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
[Tue Aug  6 21:54:52 2024] ata14.00: status: { DRDY }
[Tue Aug  6 21:54:52 2024] ata14: hard resetting link
[Tue Aug  6 21:54:52 2024] ata9.00: configured for UDMA/133
[Tue Aug  6 21:54:52 2024] ata9: EH complete
[Tue Aug  6 21:54:53 2024] ata14: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[Tue Aug  6 21:54:53 2024] ata14.00: supports DRM functions and may not be fully accessible
[Tue Aug  6 21:54:53 2024] ata14.00: disabling queued TRIM support
[Tue Aug  6 21:54:53 2024] ata14.00: supports DRM functions and may not be fully accessible
[Tue Aug  6 21:54:53 2024] ata14.00: disabling queued TRIM support
[Tue Aug  6 21:54:53 2024] ata14.00: configured for UDMA/133
[Tue Aug  6 21:54:53 2024] ata14: EH complete
[Tue Aug  6 21:54:53 2024] ata14.00: Enabling discard_zeroes_data
[Tue Aug  6 21:54:53 2024] ata14.00: supports DRM functions and may not be fully accessible
[Tue Aug  6 21:54:53 2024] ata14.00: disabling queued TRIM support
[Tue Aug  6 21:54:53 2024] ata14.00: supports DRM functions and may not be fully accessible
[Tue Aug  6 21:54:53 2024] ata14.00: disabling queued TRIM support
[Tue Aug  6 21:54:53 2024] ata14.00: configured for UDMA/133
[Tue Aug  6 21:54:53 2024] ata14: EH complete
[Tue Aug  6 21:54:53 2024] ata14.00: Enabling discard_zeroes_data
[Tue Aug  6 21:54:53 2024] ata14: limiting SATA link speed to 3.0 Gbps
[Tue Aug  6 21:54:53 2024] ata14.00: exception Emask 0x10 SAct 0x200 SErr 0x400100 action 0x6 frozen
[Tue Aug  6 21:54:53 2024] ata14.00: irq_stat 0x08000000, interface fatal error
[Tue Aug  6 21:54:53 2024] ata14: SError: { UnrecovData Handshk }
[Tue Aug  6 21:54:53 2024] ata14.00: failed command: WRITE FPDMA QUEUED
[Tue Aug  6 21:54:53 2024] ata14.00: cmd 61/50:48:b8:3e:20/03:00:00:00:00/40 tag 9 ncq 434176 out
                                    res 40/00:48:b8:3e:20/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
[Tue Aug  6 21:54:53 2024] ata14.00: status: { DRDY }
[Tue Aug  6 21:54:53 2024] ata14: hard resetting link
[Tue Aug  6 21:54:53 2024] ata14: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[Tue Aug  6 21:54:53 2024] ata14.00: supports DRM functions and may not be fully accessible
[Tue Aug  6 21:54:53 2024] ata14.00: disabling queued TRIM support
[Tue Aug  6 21:54:53 2024] ata14.00: supports DRM functions and may not be fully accessible
[Tue Aug  6 21:54:53 2024] ata14.00: disabling queued TRIM support
[Tue Aug  6 21:54:53 2024] ata14.00: configured for UDMA/133
[Tue Aug  6 21:54:53 2024] ata14: EH complete
[Tue Aug  6 21:54:53 2024] ata14.00: Enabling discard_zeroes_data

 

This seems to be a known issue and patches are out, but only with kernel 5.15+. I'm running DSM 7.0.1-42218 Update 2 (which seems to have kernel 4.14) on Proxmox 7.1, on an intel Nuc10iFNH. The SATA contoller has been passed through the DSM VM.

 

root@ds918p:~# uname -a
Linux ds918p 4.4.180+ #42218 SMP Mon Oct 18 19:17:56 CST 2021 x86_64 GNU/Linux synology_apollolake_918+

How are others getting the full SATA 6 Gbps link and hence full performance with these disks?

[smileyworld]

 

root@xxx:~# uname -a
Linux xxx 4.4.302+ #69057 SMP Fri Jan 12 17:02:26 CST 2024 x86_64 GNU/Linux synology_broadwellnk_3622xs+