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I have an Icy Box IB-1816M-C31 USB 3.1 Gen 2 enclosure containing a 512GB Samsung 950 Pro NVMe SSD, for which Scanner cannot read the SMART data. This enclosure uses a JMicron JMS583 USB-NVMe bridge, and shows up as a UASP device using the ASUS UAS Storage Driver (removing this driver and using the default driver, which takes it out of UASP mode, doesn't change anything). CystalDiskInfo is able to read the SMART data, as is smartctl when run with the -d sntjmicron option to correctly identify the USB device. -d sntjmicronC:\Program Files\smartmontools\bin>smartctl -a -d sntjmicron /dev/sdg smartctl 7.0 2018-12-30 r4883 [x86_64-w64-mingw32-w10-1803] (sf-7.0-1) Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Number: Samsung SSD 950 PRO 512GB Serial Number: S2GMNXAH113261W Firmware Version: 2B0QBXX7 PCI Vendor/Subsystem ID: 0x144d IEEE OUI Identifier: 0x002538 Controller ID: 1 Number of Namespaces: 1 Namespace 1 Size/Capacity: 512,110,190,592 [512 GB] Namespace 1 Utilization: 237,899,358,208 [237 GB] Namespace 1 Formatted LBA Size: 512 Namespace 1 IEEE EUI-64: 002538 5161b033cd Local Time is: Sat Jul 20 17:41:36 2019 GMTST Firmware Updates (0x06): 3 Slots Optional Admin Commands (0x0007): Security Format Frmw_DL Optional NVM Commands (0x001f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat Maximum Data Transfer Size: 32 Pages Supported Power States St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat 0 + 6.50W - - 0 0 0 0 5 5 1 + 5.80W - - 1 1 1 1 30 30 2 + 3.60W - - 2 2 2 2 100 100 3 - 0.0700W - - 3 3 3 3 500 5000 4 - 0.0050W - - 4 4 4 4 2000 22000 Supported LBA Sizes (NSID 0x1) Id Fmt Data Metadt Rel_Perf 0 + 512 0 0 === START OF SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 51 Celsius Available Spare: 100% Available Spare Threshold: 10% Percentage Used: 2% Data Units Read: 40,017,269 [20.4 TB] Data Units Written: 74,499,658 [38.1 TB] Host Read Commands: 586,596,545 Host Write Commands: 842,689,794 Controller Busy Time: 3,890 Power Cycles: 3,841 Power On Hours: 10,578 Unsafe Shutdowns: 66 Media and Data Integrity Errors: 0 Error Information Log Entries: 13,386 Error Information (NVMe Log 0x01, max 64 entries) Num ErrCount SQId CmdId Status PELoc LBA NSID VS 0 13386 0 0x0b0e 0x4004 0x000 0 0 - 1 13385 0 0x0609 0x4004 0x000 0 0 - 2 13384 0 0x0508 0x4004 0x000 0 0 - 3 13383 0 0x0407 0x4004 0x000 0 0 - 4 13382 0 0x0306 0x4004 0x000 0 0 - 5 13381 0 0x0a06 0x4004 0x000 0 0 - 6 13380 0 0x010a 0x4004 0x000 0 0 - 7 13379 0 0x0e06 0x4004 0x000 0 0 - 8 13378 0 0x0d01 0x4004 0x000 0 0 - 9 13377 0 0x0c00 0x4004 0x000 0 0 - 10 13376 0 0x0b0f 0x4004 0x000 0 0 - 11 13375 0 0x0a0e 0x4004 0x000 0 0 - 12 13374 0 0x090d 0x4004 0x000 0 0 - 13 13373 0 0x080c 0x4004 0x000 0 0 - 14 13372 0 0x070b 0x4004 0x000 0 0 - 15 13371 0 0x060a 0x4004 0x000 0 0 - ... (48 entries not shown) The stickied Direct I/O Test tool cannot read the SMART data either - it can only retrieve the following SSD data, no matter what method is used: Version: 40 Model: SamsungSSD 950 PRO 2B0Q Serial number: DD56419883A90 Bus type: Usb Command queuing: True Device type: 0x00 Raw device properties: 0 Removable media: False Vendor ID: Samsung Product ID: SSD 950 PRO 2B0Q Product revision: 0204 Every other option shows as a red cross, unless ScsiPassthroughJmicron is selected. In that case, SMART status under Direct I/O becomes available (but not any other option), however it reports as Status: Failing

So I just installed the Scanner after using Drivepool for about 15 days now, however, with both of my disks I get "The on-disk SMART check is not accessible on any of your disks". Also, this http://prntscr.com/7a7lgz. However, smartctl seems to give me SMART data. Any ideas on how to fix? I'm currently using a HP Proliant Gen8 Microserver. I tried unsafe DirectIO but that did not seem to work. Any help would be much appreciated