Any second USB NVMe disk housing available? If yes, test the disk out in there. If it works: you found out the disk housing is defective. If it does not work: it may be the disk. Do you have a second NVMe disk available? Switch disks. Then check if the second disk works with this maybe defective disk housing. If it does, the disk may be defective. If it does not, the housing is defective. It may even be both are defective: the disk and the housing.
On Sun, Mar 30, 2025 at 2:45 PM Peter Humphrey <pe...@prh.myzen.co.uk> wrote: > Greetings, > > The journey continues... > > I recently bought a Ugreen USB-3 external NVMe housing and a Samsung 990 > Pro > 4TB SSD. They worked fine for a few weeks, including yesterday when I used > it > to back up my LAN server. Today, every attempt to connect it returns a > dmesg > error: "Read Capacity(10) failed" and of course it can't be connected. I've > tried it on three machines, all with the same result. > > My quandary is: how can I tell whether the Ugreen controller is not > querying > the SSD, or the SSD is not answering it? Which component do I return as > faulty? > > The full dmesg entry: > > usb 3-7: new high-speed USB device number 7 using xhci_hcd > usb 3-7: New USB device found, idVendor=0bda, idProduct=9210, > bcdDevice=20.01 > usb 3-7: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > usb 3-7: Product: Ugreen Storage Device > usb 3-7: Manufacturer: Ugreen > usb 3-7: SerialNumber: 012938058E61 > usb-storage 3-7:1.0: USB Mass Storage device detected > scsi host2: usb-storage 3-7:1.0 > scsi 2:0:0:0: Direct-Access Realtek RTL9210 1.00 PQ: 0 ANSI: > 6 > sd 2:0:0:0: [sda] Read Capacity(10) failed: Result: hostbyte=DID_OK > driverbyte=DRIVER_OK > sd 2:0:0:0: [sda] Sense Key : Illegal Request [current] > sd 2:0:0:0: [sda] Add. Sense: Invalid field in cdb > sd 2:0:0:0: [sda] 0 512-byte logical blocks: (0 B/0 B) > sd 2:0:0:0: [sda] 0-byte physical blocks > sd 2:0:0:0: [sda] Write Protect is off > sd 2:0:0:0: [sda] Mode Sense: 37 00 00 08 > sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't > support DPO or FUA > sd 2:0:0:0: [sda] Attached SCSI disk > > -- > Regards, > Peter. > > > > > -- Thomas
