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Raspberry Pi Forum Can Raspberrypi boot initially from USB stick
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  • Replies 18 replies
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  • raspberry_pi
Related

Can Raspberrypi boot initially from USB stick

Former Member
Former Member over 13 years ago

Hi,

 

As i usually install software via USB stick i wonder, will RaspberryPI also install when bootable USB stick is inserted into the USB slot?

 

E.g. can i bypass in this manner the creation of the bootable SD card.
And just have the install process of the image do the job for me, just like an average installation on a disk. In this case it will be a SD card.

 

Thanks for sharing.

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  • Former Member
    Former Member over 13 years ago

    Most modern BIOS chips allow / can be updated to set a USB port device as bootable.

    I can't see any reason why this should be any different.

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  • Former Member
    Former Member over 13 years ago in reply to Former Member

    Raspberry PI doesn't have a bios. It doesn't have even a real time clock.

    Even if it had a bios, it could not remember the settings because it doesn't have a battery to keep power to the memory.

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  • Former Member
    Former Member over 13 years ago in reply to Former Member

    It doesn't need a battery because it has to be plugged into a power source all the time......... so it will never forget anything - just like me - HA !

     

    (in a normal PC if the battery runs out the BIOS still works - it just has to be reset on bootup)

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  • Former Member
    Former Member over 13 years ago in reply to Former Member

    It doesn't need a battery because it has to be plugged into a power source all the time......... so it will never forget anything - just like me - HA !

     

    (in a normal PC if the battery runs out the BIOS still works - it just has to be reset on bootup)

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  • Former Member
    Former Member over 13 years ago in reply to Former Member

    It would in theory be possible to write a program on the SD card that loaded a USB driver, then loaded and run a program from that.  Essentially the BIOS would be on the SD card.

     

    Maybe someone will do so, it's early days in the life of this product.  But I'm not sure what it would achieve, the system can be written to an SD card just as easily as to a USB drive.

     

    Chris

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  • Former Member
    Former Member over 13 years ago in reply to Former Member

    I think that the point of being able to boot from a USB device is that it gives the option of installing other operating systems to experiment with, which could install AND run from the USB device so it gets around the space limitations of the SD card.

     

    I remember a problem with the first netbooks that came out with only small solid state hard drives. As soon as the computer connected to the internet and "updated" the operating system the drive was full [of course that was bloatware windows)

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  • mahjongg
    mahjongg over 13 years ago in reply to Former Member

    David Gibson wrote:

     

    I think that the point of being able to boot from a USB device is that it gives the option of installing other operating systems to experiment with, which could install AND run from the USB device so it gets around the space limitations of the SD card.

     

     

     

    What space limitation is that? SD-cards can be large enough to hold multiple OS's.

     

     

    The RP-PI has been known to work with SD-Cards with at least 16GB (the Dane-Elec 16Gb class 4) but probably larger cards will also work, (as long as they do not use class 10). See R-PI wiki at http://elinux.org/RPi_VerifiedPeripherals

     

    A typical Linux distro will take about 2GB, so eight of them will fit on a 16Gb card.

     

    It probably won't be long after the R-PI becomes available to the larger public before someone writes a "boot manager", so you can pick which OS (or application) you want to boot from the SD-card.

     

    For me one of the charms of the R-PI is that you can pick and choose an SD-Card, put it in the R-PI, and it will transform the R-PI into the device of your choice. It also harks back to the time of the Amiga 500 (or pick any other home computer) when depending on which floppy (or cartridge) you used you could start some application or Game.

     

    When the R-PI comes in the hands of eager kids, I can see a new activity during school breaks, swapping SD-Cards. image

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  • Former Member
    Former Member over 13 years ago in reply to mahjongg

    SD-Cards (as long as they do not use class 10)

     

    oh noes!

     

    SD version 3.0 is evil because?

     

    ::

    http://www.raspberrypi.org/forum/general-discussion/class-10-sd-cards-on-the-production-boards/page-3#p39181

     

    SD version 3.01?  [UHS-I]

    http://www.raspberrypi.org/forum/general-discussion/class-10-sd-cards-on-the-production-boards/page-4#p40724

     

     

     

    pretty graphs of my benchmark results.  Notice how the Class 10 cards are not so often faster than Class 4 or 6 equivalents in practice.

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