[lkml]   [2000]   [Mar]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Answer (Re: Cylinder limits jumper for drives over 32GB)
    On Tue, 28 Mar 2000, H. Peter Anvin wrote:

    > Andre... what we're trying to figure out if there is a way to this
    > *TRANSIENTLY*, so that a reset will set it back to the old value.
    > However, if plugging in manual values in the BIOS works then that's
    > probably the recommended way, unless there really is an easy way to work
    > around.
    > Remember... most hardware/firmware is broken. Part of what makes a good
    > OS is to work with broken hardware without sacrificing working with
    > properly working hardware. God knows I've messed lots with BIOS bugs.


    Please trust that I know the world is full of broken hardware, and even
    if you follow the exact OEM directions for the hardware, it still can go
    wrong. I see some of the worst night/day-mares in ATA hardware than
    anyone can imagine.

    There is only three possible solutions for the 05/14/99 (and older) AWARD
    BIOS problem........

    1) Users purchase an ADD-ON card that will handle the large drives.

    2) Users issues a bogus geometry to the BIOS and we ignore it and use the
    entire disk.

    3) Users runs OEM capacity shrinking tool. Depend on Linux to issue
    READ/SET_MAX_ADDRESS and update the values "soft" and not clobber the
    "protected memory area". In principle, a reboot/power-cycle will revert
    the capacity back to 32GB so that one may reboot with out a hang.

    This is the preferred order in my book.

    FYI, I am working with the ADD-ON card manufacturers to get them to
    correct their BIOS code to prevent this problem.


    Andre Hedrick
    The Linux ATA/IDE guy

    I only got wierded out because of potential partition fragmentation if any
    goes wrong.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:57    [W:0.033 / U:6.200 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site