Solved 8GB USB flash drive not eligible as installer boot media?

AndreyT

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For some reason, Windows 8.1. downloader package refuses to see my 8GB SanDisk flash drive as a target for creating bootable Windows 8.1 installer USB media. A 16GB Patriot drive is detected and processed properly, but 8GB SanDisk is ignored. The same is true for the Windows 7 USB/DVD tool.

What could be causing this?

When I create the media on the 16GB drive, only 3+GB is used, which means that 8GB drive should be sufficiently large.

UPDATE: It appears that the SanDisk drive is not detected as "removable", so neither Windows 8 downloader nor Windows 7 USB/DVD tool see it as a valid target. There are quite a few reports of that issue on the Net. So, how do I create a bootable Windows 8.1 install media from that SanDisk drive?
 

My Computer

System One

  • OS
    Windows 7
Use Diskpart
Clean
format fat32

I had a few SanDisk thumb drives that would not work as install drives no mater what I did. I did a little searching and found out there were some issues with older thumb drives and UEFI, I sent them back to Amazon and got newer units for about the same price and have had no problems with these
 

My Computer

System One

  • OS
    Windows 8.1 Pro MC
    Computer type
    Laptop
    System Manufacturer/Model
    Asus G75VW / Z97 Pro
    CPU
    Intel Core i7-3610QM / I7-4790K
    Motherboard
    Z97 Pro
    Memory
    16 GB Hyundai HTM315156CFR8C-PB PC3-12800
    Graphics Card(s)
    nVIDIA GeForce GTX 670M (GF114M)
    Sound Card
    VIA 6.0.10.1600
    Screen Resolution
    1080
    Hard Drives
    Samsung 850 Pro 256, Samsung 850 Pro 1TB
    Internet Speed
    30 down 3 up
    Browser
    Explorer 11
    Antivirus
    NIS and Malwarebytes
For some reason, Windows 8.1. downloader package refuses to see my 8GB SanDisk flash drive as a target for creating bootable Windows 8.1 installer USB media. A 16GB Patriot drive is detected and processed properly, but 8GB SanDisk is ignored. The same is true for the Windows 7 USB/DVD tool.

What could be causing this?

When I create the media on the 16GB drive, only 3+GB is used, which means that 8GB drive should be sufficiently large.

UPDATE: It appears that the SanDisk drive is not detected as "removable", so neither Windows 8 downloader nor Windows 7 USB/DVD tool see it as a valid target. There are quite a few reports of that issue on the Net. So, how do I create a bootable Windows 8.1 install media from that SanDisk drive?

I had the same problem with a couple of Sandisk thumb drives I just bought. They don't show up as removable so the Windows 7 DVD download toll wouldn't use them. I used diskpart to make my bootable thumb drive. Option two in this tutorial. http://www.eightforums.com/tutorials/15458-uefi-bootable-usb-flash-drive-create-windows.html?filter
 

My Computer

System One

  • OS
    Windows 10 Education 64 Bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Asus
    CPU
    AMD Phenom II X4 980 Black Edition Deneb 3.7GHz
    Motherboard
    ASUS M4N68T-M V2 µATX Motherboard
    Memory
    8GB 4GBx2 Kingston PC10600 DDR3 1333 Memory
    Graphics Card(s)
    NVIDIA Geforce GT640 2 Gig DDR3 PCIe
    Sound Card
    VIA VT1708s High Definition Audio 8-channel Onboard
    Monitor(s) Displays
    22" LG E2242 1080p and 2 19" I-INC AG191D
    Screen Resolution
    1280x1024 - 1920x1080 - 1280x1024
    Hard Drives
    Crucial MX100 256 GB SSD and 500 GB WD Blue SATA
    PSU
    Thermaltake TR 620
    Case
    Power Up Black ATX Mid-Tower Case
    Cooling
    Stock heatsink fan
    Keyboard
    Logitech Wireless K350 Wave
    Mouse
    Logitech M570 Trackball and T650 TouchPad
    Internet Speed
    80 Mbps Down 30 Mbps Up
    Browser
    Internet Explorer 11
    Antivirus
    Windows Defender
    Other Info
    HP DVD1040e Lightscribe - External USB2
Use Diskpart
Clean
format fat32


I had a few SanDisk thumb drives that would not work as install drives no mater what I did. I did a little searching and found out there were some issues with older thumb drives and UEFI, I sent them back to Amazon and got newer units for about the same price and have had no problems with these

Also in diskpart, mark the drive ACTIVE.
 

My Computer

System One

  • OS
    ME, XP,Vista,Win7,Win8,Win8.1
    Computer type
    PC/Desktop
    Other Info
    Notebooks x 3

    Desktops x 5

    Towers x 4
Could these be U3 drives? Normally flash drives are not partitioned and removable.
But drives with multiple partitions (U3 for example) are not removable.
You can search for U3 removal tools, or probably diskpart will clean it up.
Just make sure you clean all partitions.
 

My Computer

System One

  • OS
    Windows 8.1 Pro with Media Center (64-bit)
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Custom-build
    CPU
    Intel Core i7-2600K @ 4.3 GHz
    Motherboard
    ASUS P8P67 PRO Rev 3.0
    Memory
    16 GB G.SKILL Ripjaws X DDR3 SDRAM DDR3 1600 (4 banks 4GB DIMM DDR3 8-8-8-24 5-32-12-7 1T 1.5V)
    Graphics Card(s)
    NVIDIA GeForce GT 440
    Sound Card
    Firewire Focusrite Saffire Pro 14
    Monitor(s) Displays
    LG W2353V
    Screen Resolution
    1920x1080
    Hard Drives
    2 of Seagate Barracuda XT ST32000641AS (2TB ea.);
    1 of Seagate Barracuda Green ST2000DL003 (2TB);
    1 of Hitachi Deskstar HDS722020ALA330 (2TB);
    2 of Seagate Desktop ST4000DM000-1F2168 (4TB)
    PSU
    Corsair AX850 Gold
    Case
    Cooler Master HAF 932 Advanced
    Cooling
    ThermalTake Silent 1156
    Keyboard
    Logitech K520
    Mouse
    Logitech M310
    Internet Speed
    7Mbps
    Browser
    Chrome
    Antivirus
    Kaspersky
    Other Info
    Event Studio Precision 6 powered audio monitors;
    Boston Acoustics CS Sub 10 Powered Subwoofer;
    NI Kore controller;
    NI Maschine controller;
    M-Audio Axiom 61 keyboard controller; expression pedal; sustain pedal;

    ... and tons of audio software ...

    I also keep two USB 3 thumb drives (A: and B:) attached with boot recovery and security stuff that I can boot into from BIOS in case of emergency
Its something SanDisk did on purpose. I've wiped the drive and reformatted it and it still shows up that way. Why they did it I have no idea.
 

My Computer

System One

  • OS
    Windows 10 Education 64 Bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Asus
    CPU
    AMD Phenom II X4 980 Black Edition Deneb 3.7GHz
    Motherboard
    ASUS M4N68T-M V2 µATX Motherboard
    Memory
    8GB 4GBx2 Kingston PC10600 DDR3 1333 Memory
    Graphics Card(s)
    NVIDIA Geforce GT640 2 Gig DDR3 PCIe
    Sound Card
    VIA VT1708s High Definition Audio 8-channel Onboard
    Monitor(s) Displays
    22" LG E2242 1080p and 2 19" I-INC AG191D
    Screen Resolution
    1280x1024 - 1920x1080 - 1280x1024
    Hard Drives
    Crucial MX100 256 GB SSD and 500 GB WD Blue SATA
    PSU
    Thermaltake TR 620
    Case
    Power Up Black ATX Mid-Tower Case
    Cooling
    Stock heatsink fan
    Keyboard
    Logitech Wireless K350 Wave
    Mouse
    Logitech M570 Trackball and T650 TouchPad
    Internet Speed
    80 Mbps Down 30 Mbps Up
    Browser
    Internet Explorer 11
    Antivirus
    Windows Defender
    Other Info
    HP DVD1040e Lightscribe - External USB2
Thanks for the replies. So, diskpart can be used for that purpose.

Before I read about the diskpart-based workaround I used Zotac WinUSB Maker utility to "burn" the ISO directly to USB. It also worked perfectly.
 

My Computer

System One

  • OS
    Windows 7
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