centos - CentOS6.4 Installation - USB flash not showing up in the "What type of media contains the installation image?" step

  • Linux NewB

    I'm currently trying to get CentOS 6.4 installed. Instead of downloading the dvd I downloaded the the minimal.iso file and used a programme called unetbootin to create a bootable usb flash that I could use to then boot and install.

    I have configured BIOS to boot from usb and all is well however I have reached a step in the installation process where I am being prompted to select what type of media contains the installation image. Four options are available to me :

    Local CD/DVD, Hard Drive, NFS Directory, URL.

    I don't see my usb flash anywhere here and have even tried all the options given to me but it results in a "Device does not appear to contain an installation image" error.

    It booted off my usb but wont show up now.

    This is my first attempt at getting CentOS installed.

    How do I get my USB flash to show up as an option?

    Thanking you in advance. New and confused

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    Related Question

    Install Windows 7 from USB flash drive
  • nateify

    I have an ISO image of the Windows 7 installation DVD, but I can't burn it to CD or DVD. I have an empty flash drive with plenty of space. Is there any way I can put the ISO image on it and install from it as if it were a CD?

  • Related Answers
  • 8088

    Microsoft has released a tool to put an ISO of Windows 7 on a bootable USB drive (or on a DVD).

    Windows7Hacker has an explanation on where to download this tool and how to use it : Creating Bootable Windows 7 Install USB Flash Drive or DVD Using Windows 7 USB/DVD Download Tool

    alt text

  • Matthew Read

    Here's the method I use, it seems to work on more flash drives than other methods (especially if the partitioning or formatting of the drive got messed up). This also works with Windows 8.

    1. Start an elevated command prompt (i.e., run the command prompt as an Administrator)

    2. Clean, partition, and format the USB drive with diskpart

    1. Run diskpart
    2. Type list disk to see which disk number your flash drive is
    3. Type select disk #, where # is the number from step (2)
    4. Type clean to clear the drive
    5. Type create partition primary
    6. Type select partition 1
    7. Type active to make the partition active
    8. Type format fs=fat32 to format the partition
    9. Type assign to commit the changes to disk
    10. Type exit to leave diskpart

    3. Set up the boot sector with bootsect

    • Run X:\boot\bootsect.exe /nt60 Y: where X is the Windows disc* and Y is the flash drive

    • Note: Use /nt52 instead if you're doing this process for XP! Bootsect.exe doesn't come with XP, though, so you'll still need a Vista or 7 disc to get a copy of bootsect.

    4. Copy the contents of the Windows DVD over to the USB drive

    • You can use xcopy to ensure the files are all copied properly: xcopy X:\* Y:\ /E /H /J /K /V (note that this doesn't do CRC checking or anything extensive, but what's the chance you'll need that?)

    I originally learned this method from "Kevin's Blog", so credit to him.

    * I like to mount ISOs with Daemon Tools, the free version is fantastic. You can, of course, use WinRAR or something to extract the DVD instead; just replace X:\ with the path to the extracted folder.

  • William Hilsum


    Easiest way is to mark a partition as active (although not always needed, depending on your motherboard).

    Next, extract everything in the ISO to the root of the USB drive (use Winrar, 7-Zip or your favourite extraction program.).

    Reboot and either change boot order in the BIOS or press whatever key it is on your motherboard to bring up the boot menu (usually F12 or Esacpe).

    Choose USB drive.


  • 8088

    Use UNetBootin to create a bootable USB flash drive with the ISO.

    The software was made for creating bootable linux flash drives, but works with any bootable ISO.

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  • Aldrik

    If already running Windows™ you can simply use the Windows 7 USB/DVD Download Tool from Microsoft.

    If on another OS you can perform the following steps:

    1. Make sure the filesystem is NTFS and has the bootable flag set..
    2. Use ms-sys to write boot record (ms-sys -7 /dev/sdx).
    3. Mount the ISO and copy all the files and directories.
  • Peter Mortensen

    Here you go, in four easy steps:

    1. Using the HP USB Disk Storage Format Tool (v2.0.6), format the flash drive using FAT32 leaving all the boxes unchecked.

    2. Mount the Windows 7 ISO image using Virtual CloneDrive (a free tool).

    3. Then copy the contents of the ISO image (all of the Windows 7 files and folders) over to the flash drive. Grab a cup of coffee; it could take upwards of 5-10 minutes.

    4. Lastly, rename the file on the root of the flash drive from "BOOTMGR" to "NTLDR".

    I hope this helps...

  • meguroyama

    I love using rufus for extracting any OS onto a USB. It's source is on github as well.

    Rufus Source on GitHub

    Rufus Download

    Rufus UI