All, I've found a relatively cheap multi-disk chassis that connects using e-SATA. Since my machine doesn't have e-SATA, I've ordered a simple e-SATA card which is currently on backorder.
However, I realized my Cubox has an e-SATA port, so I tried connecting it there, and it does get detected. However, with errors and the disks that are in the chassis are not found: imxahci0 at simplebus0: AHCI 1.3 imxahci0: port multiplier found: chip=38261095 rev=0x1706<PM1.1,PM1.0> nports=6, features: 0x9<AsyncNotify,BIST>, enabled: 0x1<BIST> imxahci0: device on port 0 didn't come ready, TFD: 0x50 imxahci0: port 0: 3.0Gb/s scsibus0 at imxahci0: 32 targets uk0 at scsibus0 targ 0 lun 0: <ATA, Port Multiplier, > SCSI3 30/unknown fixed imxahci0.0: unable to clear PHY status imxahci0.0: PMP port softreset cmd failed imxahci0.0: unable to clear PHY status imxahci0.0: PMP port softreset cmd failed imxahci0.0: unable to probe PMP port due to softreset failure imxahci0.1: unable to probe PMP port; portreset failed imxahci0.2: unable to probe PMP port; portreset failed imxahci0.3: unable to probe PMP port; portreset failed imxahci0.4: unable to probe PMP port; portreset failed imxahci0.5: unable to probe PMP port; portreset failed I have no prior experience with port multipliers on OpenBSD, so I'm not sure where the problem lies. Is this a limitation of imxahci? Cheers, Paul 'WEiRD' de Weerd OpenBSD 6.1-current (GENERIC) #193: Sat Jul 1 03:40:04 MDT 2017 dera...@armv7.openbsd.org:/usr/src/sys/arch/armv7/compile/GENERIC real mem = 2147483648 (2048MB) avail mem = 2097532928 (2000MB) mainbus0 at root: SolidRun Cubox-i Dual/Quad cpu0 at mainbus0: ARM Cortex A9 R2 rev 10 (ARMv7 core) cpu0: DC enabled IC enabled WB disabled EABT branch prediction enabled cpu0: 32KB(32b/l,4way) I-cache, 32KB(32b/l,4way) wr-back D-cache cortex0 at mainbus0 amptimer0 at cortex0: tick rate 396000 KHz armliicc0 at cortex0: rtl 7 waymask: 0x0000000f simplebus0 at mainbus0: "soc" ampintc0 at simplebus0 nirq 160, ncpu 4 simplebus1 at simplebus0: "aips-bus" imxccm0 at simplebus1: imx6 rev 1.5 CPU freq: 792 MHz imxiomuxc0 at simplebus1 simplebus2 at simplebus1: "spba-bus" imxuart0 at simplebus2: console imxgpio0 at simplebus1 imxgpio1 at simplebus1 imxgpio2 at simplebus1 imxgpio3 at simplebus1 imxgpio4 at simplebus1 imxgpio5 at simplebus1 imxgpio6 at simplebus1 imxdog0 at simplebus1 imxtemp0 at simplebus1 imxgpc0 at simplebus1 simplebus3 at simplebus0: "aips-bus" imxehci0 at simplebus3 usb0 at imxehci0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "i.MX6 EHCI root hub" rev 2.00/1.00 addr 1 imxehci1 at simplebus3 usb1 at imxehci1: USB revision 2.0 uhub1 at usb1 configuration 1 interface 0 "i.MX6 EHCI root hub" rev 2.00/1.00 addr 1 fec0 at simplebus3 fec0: address d0:63:b4:00:3f:fb atphy0 at fec0 phy 0: AR8035 10/100/1000 PHY, rev. 2 imxesdhc0 at simplebus3 imxesdhc0: 198 MHz base clock sdmmc0 at imxesdhc0: 4-bit, mmc high-speed, dma imxesdhc1 at simplebus3 imxesdhc1: 198 MHz base clock sdmmc1 at imxesdhc1: 4-bit, mmc high-speed, dma imxiic0 at simplebus3 iic0 at imxiic0 imxiic1 at simplebus3 iic1 at imxiic1 pcfrtc0 at iic1 addr 0x68: battery ok imxocotp0 at simplebus3 imxuart1 at simplebus3 imxahci0 at simplebus0: AHCI 1.3 imxahci0: port multiplier found: chip=38261095 rev=0x1706<PM1.1,PM1.0> nports=6, features: 0x9<AsyncNotify,BIST>, enabled: 0x1<BIST> imxahci0: device on port 0 didn't come ready, TFD: 0x50 imxahci0: port 0: 3.0Gb/s scsibus0 at imxahci0: 32 targets uk0 at scsibus0 targ 0 lun 0: <ATA, Port Multiplier, > SCSI3 30/unknown fixed imxahci0.0: unable to clear PHY status imxahci0.0: PMP port softreset cmd failed imxahci0.0: unable to clear PHY status imxahci0.0: PMP port softreset cmd failed imxahci0.0: unable to probe PMP port due to softreset failure imxahci0.1: unable to probe PMP port; portreset failed imxahci0.2: unable to probe PMP port; portreset failed imxahci0.3: unable to probe PMP port; portreset failed imxahci0.4: unable to probe PMP port; portreset failed imxahci0.5: unable to probe PMP port; portreset failed simplebus4 at mainbus0: "regulators" scsibus1 at sdmmc1: 2 targets, initiator 0 sd0 at scsibus1 targ 1 lun 0: <Sandisk, SA16G, 0024> SCSI2 0/direct removable sd0: 14772MB, 512 bytes/sector, 30253056 sectors (manufacturer 0x2d0, product 0x4330)at sdmmc0 function 1 not configured (manufacturer 0x2d0, product 0x4330)at sdmmc0 function 2 not configured vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets boot device: sd0 root on sd0a (fe2f3d685a24e68d.a) swap on sd0b dump on sd0b -- >++++++++[<++++++++++>-]<+++++++.>+++[<------>-]<.>+++[<+ +++++++++++>-]<.>++[<------------>-]<+.--------------.[-] http://www.weirdnet.nl/