SPI Flash // Size file not equal than bios chip?

Discussion in 'BIOS Mods' started by Tomvosges, Apr 20, 2014.

  1. Tomvosges

    Tomvosges MDL Novice

    Apr 20, 2014
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    Hi all.

    I'm French person, so i'm sorry if my English not correct.

    I have a Toshiba C855-21Q. I ran a bios update and the flash fails.

    So i wan't to unbrick it and use SPI Flash with a Raspberry Pi and Flashrom (the chip is a Windbond W25Q32BVSIG).

    Wiring is ok, the chip is detect and flashrom can read, erase and write the chip.

    But i have problem, when i get the bios update, extract it. I have to files one for Win 7 platform an another one for Win 8 platform. The laptop is under Win 8 (UEFI i think).

    So i take the Bios file (fd extension) for Win 8 but the file size is 6MB or the bios chip is 4MB (32 Megabit).

    How can i flash this file.

    Thank you for your help.

    Sincerely.

    Tomvosges.
     
  2. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    and of course u did not make a backup.bin of corrupt bios and now DMI bios data is missing.. u were supposed to merge it with new bios download so it would complete size.

    good luck
     
  3. Tomvosges

    Tomvosges MDL Novice

    Apr 20, 2014
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    0
    0
    Hi.

    Thank for your answer.

    Unfortunately i don't make a backup before the flash.

    Without this backup it's impossible to reflash correctly the chip ?

    Sincerely.

    Tomvosges
     
  4. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    need a full dump from same type pc.