Samsung SSD On Sata to USB3 Adapter Cable Shows As SCSI Not USB3

My external Sata Samsung SSD (on a Sata to USB3 adapter cable plugged into a USB3 motherboard external port) shows as a SCSI drive and not as a USB3 drive in Device Manager on my computer. It should show as a USB3 device As a result, the transfer speeds which should operate at 120mbs only operate at 13mbs.

I noticed this as I tried cloning my internal Samsung SSD to an identical external Samsung SSD drive plugged in via that Startech adapter cable. Both drives and the cable worked flawlessly in WIN 7 but not in WIN 10. I called Startech and they indicated it was a known WIN 10 issue on some machines, but had no solutions. Seems like it may be a driver problem and when I access that specific drive/driver it shows a working Windows driver from 2006 with no option to update.

As I said, it operated in WIN 7 properly but not WIN 10. A search showed others with the same issue but no real solution. It takes me over an hour to clone my C drive with WIN 10 whereas it normally takes only 10 minutes with WIN 7.

This desktop computer is a newly built i7-8700k on a MSI Z370 motherboard with a fresh copy of WIN 10 that I purchased. This is my 5th computer build with no issues on WIN XP or WIN 7 previous builds. Had I not decided to do an immediate clone (using Samsung Data Migration as always) I would not have noticed this issue until I tried a large data transfer way down the road. Any thoughts out there?

Had that issue with a Startech Pcie add on Sata Card, was showing as SCSI, in device manager with an ancient driver, so I tried updating the driver and Windows found the Marvel driver that it should have been using, problem solved. I'm guessing the adapter has a sata controller chip in it.

I'm pretty sure Startech use Marvel and ASMedia Sata chipsets, may help?

clam1952 said:

Had that issue with a Startech Pcie add on Sata Card, was showing as SCSI, in device manager with an ancient driver, so I tried updating the driver and Windows found the Marvel driver that it should have been using, problem solved. I'm guessing the adapter has a sata controller chip in it.

I'm pretty sure Startech use Marvel and ASMedia Sata chipsets, may help?

I'm not sure exactly what is inside the cable ends that allow it to convert from sata to USB3 but works well with WIN7 just not WIN10. I asked StarTech if the cable could use any other driver than the WIN driver and they said none were available only the WIN supplied one. They did spend some time looking up the issue and for any additional info. Unfortunately, in the end all they could offer was for me to try it on another WIN10 machine which I do not have.

Run USB Device Tree Viewer and click on your external drive. Copy+paste the device info (or File->Save the report and attach it to the thread). That will show what driver is in use.

Code:

      ======================== USB Device ========================

        +++++++++++++++++ Device Information ++++++++++++++++++
Device Description       : USB Attached SCSI (UAS) Mass Storage Device
Device Path              : \\.\usb#vid_152d&pid_1561#msft30db9876543214e#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Device ID                : USB\VID_152D&PID_1561\MSFT30DB9876543214E
Hardware IDs             : USB\VID_152D&PID_1561&REV_0204 USB\VID_152D&PID_1561
Driver KeyName           : {4d36e97b-e325-11ce-bfc1-08002be10318}\0003 (GUID_DEVCLASS_SCSIADAPTER)
Driver                   : \SystemRoot\System32\drivers\uaspstor.sys (Version: 10.0.17134.1  Date: 2018-04-11)
Driver Inf               : C:\WINDOWS\inf\uaspstor.inf
Legacy BusType           : PNPBus
Class                    : SCSIAdapter
Class GUID               : {4d36e97b-e325-11ce-bfc1-08002be10318} (GUID_DEVCLASS_SCSIADAPTER)
Interface GUID           : {a5dcbf10-6530-11d2-901f-00c04fb951ed} (GUID_DEVINTERFACE_USB_DEVICE)
Service                  : UASPStor
Enumerator               : USB
Location Info            : Port_#0016.Hub_#0001
Location IDs             : PCIROOT(0)#PCI(1400)#USBROOT(0)#USB(16), ACPI(_SB_)#ACPI(PCI0)#ACPI(XHC_)#ACPI(RHUB)#ACPI(SS04)
Container ID             : {8d3f8cc3-ac94-56c6-a1a5-42de69a5b422}
Manufacturer Info        : USB Attached SCSI (UAS) Compatible Device
Capabilities             : 0x14 (Removable, UniqueID)
Status                   : 0x0180600A (DN_DRIVER_LOADED, DN_STARTED, DN_DISABLEABLE, DN_REMOVABLE, DN_NT_ENUMERATOR, DN_NT_DRIVER)
Problem Code             : 0
Power State              : D0 (supported: D0, D3, wake from D0)
 Child Device 1          : Disk drive (Disk1)
  Device ID              : SCSI\DISK&VEN_SABRENT&PROD_\000000
  Class                  : DiskDrive
   Volume                : \\?\Volume{d93ef2d0-0000-0000-007e-000000000000}\
   Kernel Name           : \Device\HarddiskVolume11
   Mountpoint            : D:\