How do I boot from a USB flash drive?

I have two different Toshiba laptops. In the BIOS settings I only see the following options.
Laptop 1:
CD/DVD
FDD
LAN
HDD1/SSD1
Laptop 2:
HDD1/SSD1
HDD2/SSD2
eSATA HDD
CD/DVD
FDD
LAN
Is it possible to make either computer boot from a USB flash drive?
Thanks in advance for any help,
yeto

FDD (Floppy Disk Drive) equates to USB in my Toshiba laptops. Seems like it's taking some BIOS designers a long time to catch up with the rest of the computer world!
C.B.
Toshiba Sat. C75D-B7260 Win 8.1 64 Bit--Toshiba Sat. L775D-S7132 Win 7 HP SP1 64 Bit and Win 10 PRO Technical Preview--Toshiba Sat. L305-S5921 Win Vista SP2 32 Bit

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I know that you can boot Leopard from a USB flash drive, and I have a 16GB flash drive I'm using as a bootup disk on this 2006 MacBook I have that has a broken hard drive (it was recalled, but the recall ended in 2010).
The problem is that it's very slow. I have about 8GB of free space on it, so it can't be the VRAM being too small. The USB speed just stinks. There must be ways to optimize the OS to run off of a slow drive by accessing data as infrequently as possible. What can I do to speed this up? Should I disable hard disk sleeping? Should I use some kind of Mac tuneup/optimization tool's feature?
I plan to get an internal hard drive for it, but I'm stuck with this for a while.

Not all USB2 Flash drives are equal, in fact I bought 2 16 GB USB drives for cheap, as along side of them were even the same brand 16 GB Flash Drives just a different model, for 5 times as much!
Me was thinking how bad could they be? Well, they could be 5 times worse than other USB2 flash drives... LOL on me!
They under extremely rare occasions will Read or Write at 5 MB/s, & very often 1 MB/s...
My Buffalo Flash drives do near USB2's top speed, see some diffs...
http://usbspeed.nirsoft.net/
Optimizing yours will give little benefit.
You could also do a USB2 RAID0 setup if you have enough ports.

Can't boot from a USB flash drive

I believe this ability was lost after updating to BIOS 80.52 following HP's "strong recommendation".No warning was given that this update would remove this ability and see that "Due to security changes, after this BIOS update is installed, previous versions cannot be reinstalled."
I have tried disabling Secure Boot and enabling Legacy Boot, and tried re-applying BIOS defaults.
Is there a particular combination of BIOS settings that I haven't been able to find?As the warranty on my computer expired in July 2014, the HP Customer Support Contact page won't even accept my request for assistance - despite the "strongly recommended" BIOS update being made available *after* this date. I require the ability to boot from USB flash drives ... how can this now be achieved?
Is there an HP BIOS for a more recent HP product with the JasmineR motherboard (or an AMI or other BIOS) available and how could I install it?
Boot a BIOS flashing program from CD or DVD and somehow bypass the HP BIOS's block on updates? Thanks in advance for any advice

Hi, thanks for the quick reply. I don't have another PC handy but will try to find one. The USB flash drive definitely does NOT appear in the boot menu - even as an HDD or CD/DVD as I have seen mentioned elsewhere as a possibility - and all USB devices are enabled in the BIOS settings and USB HDD and USB Floppy/CD are above rEFInd and all other entries in the boot order. I should also have mentioned that I've tried a (Lexar) USB flash drive prepared approximately a year ago with GParted Live which *has* previously booted the machine, and also different models of flash drives (Toshiba, Transcend) and different methods of preparing them such as burning bootable ISO images with Win32DiskImager, Universal USB Installer and Rufus, and manually creating and formatting a bootable FAT32 partition with diskpart (as per https://technet.microsoft.com/en-us/library/jj200124.aspx) and copying in System Rescue CD/GParted/Clonezilla files, ensuring there is an /EFI/BOOT/BOOTX64.efi file. In diskpart, the "attributes disk" command shows that the USB drives are not marked as bootable and "help attributes disk" says READONLY is currently the only disk flag that may be changed. (Don't know if this means anything as the GParted disk isn't "bootable" but did boot) Did the BIOS update disable enumerating USB devices until later in the Windows 8.1 boot process?

My compaq cq62-214nr will not boot from a usb flash drive

I have a Compaq CQ62-214 NR Notebook. When I enter the bios boot options screen with F9 there is a blank space where Boot from USB/Flash Drive should be. If I enter the bios setup and move usb flash drive up to the first option above Notebook hardrive and Internal CD/DVD Rom ,save the changes to the BIOS then Reboot. Enter the boot options screen again the blank line moves up to the first choice slot but still is blank. If I press enter over that black option the computer does not boot from the OS I have install on the usb flash drive it just starts its normal windows boot screen. YES I have upgraded the BIOS to the lates version F.37
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Try booting into the one time boot menu.
Step 1: As soon as you turn on the computer on the hp invent screen keep tapping F9 key.
Step 2: you will get boot otions such as hard drive, optical drive, USb drive
Step 3: You can hit enter on the usb flash drive. Should boot from the os on your flash drive
*Although I am an HP employee, I am speaking for myself and not for HP.
****Click the White Kudos star to say thanks****
****Please mark Accept As Solution if it solves your problem****

How can I boot PC by USB Flash Drive or USB 2.0 Storage Drive ?

HI
anyone know ? help me please !

If you choose USB-FDD and select the USB hard disk in the Boot Priority list, the BIOS will try to boot from that device. For giggles, I stuck a working boot disk (NTFS) into a USB enclosure and tried to boot from it but it didn't work (continuous resets), I don't know what the boot sector requirements are.

Booting from a USB Flash Drive

Is this possible? I travel a lot and to have a flash drive for use in an emergency would be great.

This could be the device you are looking for, the TechTool Protege. It says it is a 1 GB, flash memory, pocket-sized device that can boot Macs via FireWire. It says it comes with the latest version of OS X already on it. It sounds interesting, but I've not heard of it before.
http://www.micromat.com/index.php?option=content&task=view&id=34
Regards,
Steve M.
Edit: This seems to be the same device without the TechTool stuff on it.
http://www.kanguru.com/fireflash.html
Message was edited by: Steve M.

Booting a DMG from a USB Flash Drive?

Is there anyway I can boot from a USB flash drive? I don't have a DVD burner to burn the image onto, so I have to resort to this. I'm running an Intel iMac (late 2006) on Tiger.
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[SOLVED] can't boot from ssd after "reset" from recovery usb flash drive

I have a Twist s230u with the original Hitachi 500GB hdd, running Windows 8.1. I want to replace the Hitachi 500GB hdd in my Twist s230u with a PNY 240GB SSD that i've purchased.
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Current Read-only State : No
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I have a MacBook pro late 2011 version it's not booting up so I am trying to boot from a USB recovery drive but when I select it nothing happens it jus goes to the restore options

I have a MacBook pro late 2011 version it's not booting up so I am trying to boot from a USB recovery drive but when I select it nothing happens it jus goes to the restore options

Bahamaguy wrote:
I have a MacBook pro late 2011 version it's not booting up ....
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https://discussions.apple.com/community/notebooks/macbook_pro?view=documents#/
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How do I boot from a USB flash drive?

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