SATA SSD keeps disconnecting

Hello.

I've got a desktop system with two SSD drives (gmirror swap + ZFS 
mirrored pool) and one of them keeps disconnecting.

Smart says the drive is good and I've already tried replacing the cables.

Relevant dmesg:
> FreeBSD 12.3-RELEASE-p1 releng/12.3-n234208-c1494385203 AAAAA amd64
> FreeBSD clang version 10.0.1 (git@github.com:llvm/llvm-project.git llvmorg-10.0.1-0-gef32c611aa2)
> VT(vga): resolution 640x480
> CPU: Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz (3200.09-MHz K8-class CPU)
>   Origin="GenuineIntel"  Id=0x306a9  Family=0x6  Model=0x3a  Stepping=9
> ...
> ahci0: <Intel Panther Point AHCI SATA controller> port 0xf0b0-0xf0b7,0xf0a0-0xf0a3,0xf090-0xf097,0xf080-0xf083,0xf060-0xf07f mem 0xf7d15000-0xf7d157ff irq 19 at device 31.2 on pci0
> ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supported
> ahcich0: <AHCI channel> at channel 0 on ahci0
> ahcich1: <AHCI channel> at channel 1 on ahci0
> ahciem0: <AHCI enclosure management bridge> on ahci0
> ...
> ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> ada0: <PNY CS900 120GB SSD CS900613> ACS-4 ATA SATA 3.x device
> ada0: Serial Number PNY14200238640200E14
> ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> ada0: Command Queueing enabled
> ada0: 114473MB (234441648 512 byte sectors)
> ...
> ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
> ada1: <PNY CS900 120GB SSD CS900613> ACS-4 ATA SATA 3.x device
> ada1: Serial Number PNY46200029240203D8C
> ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> ada1: Command Queueing enabled
> ada1: 114473MB (234441648 512 byte sectors)



And this is what I get in the logs:
> Feb 26 12:01:01  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 12:01:01  kernel: ada0: <PNY CS900 120GB SSD CS900613> s/n PNY14200238640200E14 detached
> Feb 26 12:01:01  kernel: GEOM_MIRROR: Device swap: provider ada0p2 disconnected.
> Feb 26 12:01:01  kernel: (ada0:ahcich0:0:0:0): Periph destroyed
> Feb 26 12:01:01  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 12:01:01  kernel: ada0: <PNY CS900 120GB SSD CS900613> ACS-4 ATA SATA 3.x device
> Feb 26 12:01:01  kernel: ada0: Serial Number PNY14200238640200E14
> Feb 26 12:01:01  kernel: ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> Feb 26 12:01:01  kernel: ada0: Command Queueing enabled
> Feb 26 12:01:01  kernel: ada0: 114473MB (234441648 512 byte sectors)
> Feb 26 12:40:56  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 12:40:56  kernel: ada0: <PNY CS900 120GB SSD CS900613> s/n PNY14200238640200E14 detached
> Feb 26 12:40:56  kernel: GEOM_MIRROR: Device swap: provider ada0p2 disconnected.
> Feb 26 12:40:56  kernel: (ada0:ahcich0:0:0:0): Periph destroyed
> Feb 26 12:40:56  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 12:40:56  kernel: ada0: <PNY CS900 120GB SSD CS900613> ACS-4 ATA SATA 3.x device
> Feb 26 12:40:56  kernel: ada0: Serial Number PNY14200238640200E14
> Feb 26 12:40:56  kernel: ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> Feb 26 12:40:56  kernel: ada0: Command Queueing enabled
> Feb 26 12:40:56  kernel: ada0: 114473MB (234441648 512 byte sectors)
> Feb 26 14:34:30  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 14:34:30  kernel: ada0: <PNY CS900 120GB SSD CS900613> s/n PNY14200238640200E14 detached
> Feb 26 14:34:30  kernel: GEOM_MIRROR: Device swap: provider ada0p2 disconnected.
> Feb 26 14:34:30  kernel: (ada0:ahcich0:0:0:0): Periph destroyed
> Feb 26 14:34:31  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 14:34:31  kernel: ada0: <PNY CS900 120GB SSD CS900613> ACS-4 ATA SATA 3.x device
> Feb 26 14:34:31  kernel: ada0: Serial Number PNY14200238640200E14
> Feb 26 14:34:31  kernel: ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> Feb 26 14:34:31  kernel: ada0: Command Queueing enabled
> Feb 26 14:34:31  kernel: ada0: 114473MB (234441648 512 byte sectors)
> Feb 26 14:34:32  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 14:34:32  kernel: ada0: <PNY CS900 120GB SSD CS900613> s/n PNY14200238640200E14 detached
> Feb 26 14:34:32  kernel: GEOM_MIRROR: Device swap: provider ada0p2 disconnected.
> Feb 26 14:34:32  kernel: (ada0:ahcich0:0:0:0): Periph destroyed
> Feb 26 14:34:34  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 14:34:34  kernel: ada0: <PNY CS900 120GB SSD CS900613> ACS-4 ATA SATA 3.x device
> Feb 26 14:34:34  kernel: ada0: Serial Number PNY14200238640200E14
> Feb 26 14:34:34  kernel: ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> Feb 26 14:34:34  kernel: ada0: Command Queueing enabled
> Feb 26 14:34:34  kernel: ada0: 114473MB (234441648 512 byte sectors)
> Feb 26 18:22:58  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 18:22:58  kernel: ada0: <PNY CS900 120GB SSD CS900613> s/n PNY14200238640200E14 detached
> Feb 26 18:22:58  ZFS[52913]: vdev I/O failure, zpool=$zroo2 path=$/dev/ada0p3 offset=$270336 size=$8192 error=$6
> Feb 26 18:22:58  ZFS[52914]: vdev I/O failure, zpool=$zroo2 path=$/dev/ada0p3 offset=$102852993024 size=$8192 error=$6
> Feb 26 18:22:58  ZFS[52915]: vdev I/O failure, zpool=$zroo2 path=$/dev/ada0p3 offset=$102853255168 size=$8192 error=$6
> Feb 26 18:22:58  ZFS[52916]: vdev probe failure, zpool=$zroo2 path=$/dev/ada0p3
> Feb 26 18:22:58  kernel: GEOM_MIRROR: Device swap: provider ada0p2 disconnected.
> Feb 26 18:22:58  kernel: (ada0:ahcich0:0:0:0): Periph destroyed
> Feb 26 18:23:00  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 18:23:00  kernel: ada0: <PNY CS900 120GB SSD CS900613> ACS-4 ATA SATA 3.x device
> Feb 26 18:23:00  kernel: ada0: Serial Number PNY14200238640200E14
> Feb 26 18:23:00  kernel: ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> Feb 26 18:23:00  kernel: ada0: Command Queueing enabled
> Feb 26 18:23:00  kernel: ada0: 114473MB (234441648 512 byte sectors)
> Feb 26 18:23:01  kernel: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> Feb 26 18:23:01  kernel: ada0: <PNY CS900 120GB SSD CS900613> s/n PNY14200238640200E14 detached
> Feb 26 18:23:01  kernel: GEOM_MIRROR: Device swap: provider ada0p2 disconnected.
> Feb 26 18:23:01  kernel: (ada0:ahcich0:0:0:0): Periph destroyed



Anything I can try on the software side?
Some more logging?
Some sysctl?
Other tweaks?

  bye & Thanks
	av.