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Thread: BT4 live usb on SanDisk Cruzer

  1. #1
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    Default BT4 live usb on SanDisk Cruzer

    I have a SanDisk Cruzer 4GB pen that I used unetbootin 408 to load a md5 clean bt4.iso. My system is a Dell D620 running Windows XP SP3 and does use disk encryption for this OS. On booting from the USB (1st boot device in the BIOS) the boot loader just hangs - visually, a slow blinking underscore located top left of my screen. I let it do this for about 5 minutes and then give up. Since the iso is clean and the installer is unetbootin 408, my question is does anyone have knowledge that SanDisk Cruzer is just not good enough media.

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    Default Re: BT4 live usb on SanDisk Cruzer

    Quote Originally Posted by 8l@ckr1d3r View Post
    my question is does anyone have knowledge that SanDisk Cruzer is just not good enough media.
    Yes i would believe the SanDisk Cruzer media should work just fine in fact I use a couple of those myself to boot Backtrack with, you should check more on your hardware specs to see if it is compatible, or when you use a live CD do you receive the same blank screen? It may be possible that the load of backtrack is not correct either, i have seen this many of times when all you get is a blinking underscore located top left of my screen.

  3. #3
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    Default Re: BT4 live usb on SanDisk Cruzer

    Quote Originally Posted by 8l@ckr1d3r View Post
    a slow blinking underscore located top left of my screen. I let it do this for about 5 minutes and then give up. Since the iso is clean and the installer is unetbootin 408...
    I am having that exact same problem as we speak. Did your UNetbootin complete with no errors? Mine crashed on "Installing Bootloader" so i'm doing another copy. I was using an older version of UNetbootin so downloaded the 408 version to see if that works.
    Just when you see the light at the end of the tunnel, the roof caves in!

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    Default Re: BT4 live usb on SanDisk Cruzer

    Quote Originally Posted by chris_heyward View Post
    Did your UNetbootin complete with no errors? Mine crashed on "Installing Bootloader"
    also worth mentioning is that unetbootin may appear to hang while installing the filesystem (squashfs) because of it's ginormous size (1.4gb). if at any point your installation fails, remember to reformat the drive to fat32! i've been using unetbootin 3.77 in windoze without any issues.

    Quote Originally Posted by 8l@ckr1d3r View Post
    I have a SanDisk Cruzer 4GB pen... my question is does anyone have knowledge that SanDisk Cruzer is just not good enough media.
    is it a u3 cruzer? if so, the u3 software could be an issue and should be removed.
    thou shalt treat all computers as thou wouldst treat thyself, for thou art the creator of thine own problems.

  5. #5
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    Default Re: BT4 live usb on SanDisk Cruzer

    I was using 377 when it crashed. 408 said successful but i'm still getting the blinking underscore. If i power off my computer however, i get a message saying "Boot Error". Live DVD works fine and my fresh install works fine...ish. (just a startx problem thats still unresolved). I'm going to try my live USB in another pc tomorrow if i can get to one. That way i can at least eliminate a few things if it works
    Just when you see the light at the end of the tunnel, the roof caves in!

  6. #6
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    Default Re: BT4 live usb on SanDisk Cruzer

    8l@ckr1d3r, I also have a 4gig SanDisk Cruzer and use a Dell Latitude D620. These are the steps I followed to get things working:

    Note: I elected to use a livecd of fedora, since bt4 is a dvd image and I dont have access to a dvd burner...

    --downloaded bt4(final) iso
    --downloaded unetbootin
    --run unetbootin (in windows), selecting the "from iso" option. (I did NOT use the top option to select backtrack)
    --booted into my fedora livecd
    --mounted my SanDisk Cruzer
    --ran this script:
    Code:
    #!/bin/bash
    USB_PATH=none
    RW_SIZE=none
    clear
    echo "WARNING: Before running this script, confirm that the target USB"
    echo "drive has WRITE permission and it has been mounted. If you are"
    echo "unsure press Ctrl+C and check before running this script again."
    echo " "
    sleep 3
    echo "Enter the path to your mounted USB disk: (e.g. /media/disk-0):"
    read USB_PATH
    echo " "
    echo "Enter the amount of space you want to allocate, in MB (e.g. 1024 = 1GB or 4096 = 4GB):"
    read RW_SIZE
    echo " "
    echo "Stop all operations on target disk,"
    echo "sleeping for 5 seconds before processing..." 
    sleep 5
    echo " "
    echo "Task starting, this may take several minutes..."
    dd if=/dev/zero of=/$USB_PATH/casper-rw bs=1M count=$RW_SIZE
    mkfs.ext3 -F /$USB_PATH/casper-rw
    echo "Task completed successfully. Reboot PC in persistent mode! :)"
    full credit to nishant. (fixed typo in dd line 21)

    --changed syslinux.cfg on my SanDisk to read as follows:
    Code:
    default vesamenu.c32
    prompt 2
    menu title Back Track Linux 4 (final)
    timeout 100
    
    label ubnentry0
    menu label Memory Test
    kernel /boot/memtest86+.bin
    append -
    
    label ubnentry1
    menu label Configure System
    kernel /boot/vmlinuz
    append initrd=/boot/initrd.gz BOOT=casper boot=casper persistent textonly rw
    
    label ubnentry2
    menu label Forensics Ghost Mode
    kernel /boot/vmlinuz
    append initrd=/boot/initrdfr.gz BOOT=casper boot=casper nopersistent rw vga=0x317
    
    label ubnentry3
    menu label Standard Boot
    kernel /boot/vmlinuz
    append initrd=/boot/initrd.gz BOOT=casper boot=casper nopersistent textonly rw quiet
    
    label ubnentry4
    menu label Boot RAMdisk
    kernel /boot/vmlinuz
    append initrd=/boot/initrd.gz BOOT=casper boot=casper toram nopersistent rw quiet
    
    label ubnentry5
    menu label Boot with FrameBuffer (800x600)
    kernel /boot/vmlinuz
    append initrd=/boot/initrd800.gz BOOT=casper boot=casper nopersistent rw quiet vga=0x314 xforcevesa
    
    label ubnentry6
    menu label Boot with FrameBuffer (1024x768)
    kernel /boot/vmlinuz
    append initrd=/boot/initrd.gz BOOT=casper boot=casper nopersistent rw quiet vga=0x317
    --booted from my SanDisk, and unetbootin runs fine

    Also, be sure to check your BIOS boot order, and all that jazz. :-)

    Hope that helps. My mission was to learn about casper/persistent/usb matters, but I hope this helped, especially since we are running the same hardware.

    ~techtruth

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