Re: 5.2.1 boot fails; "Could not find Primary Volume Descriptor"

From: Jon Noack (noackjr_at_alumni.rice.edu)
Date: 03/25/04

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    Date: Wed, 24 Mar 2004 17:42:33 -0600
To: Nicolai E M Plum <nicolai-freebsd@esperi.org>

    On 3/24/2004 4:37 PM, Nicolai E M Plum wrote:
    > Hi
    >
    > I am having problems booting FreeBSD 5.2.1-RELEASE on a system I
    > have. Booting from CD gives me:
    >
    > ----
    > [other messages from the BIOS]
    > CD Loader 1.01
    >
    > Building the boot loader arguments
    > Read Error: 0x01
    > Could not find Primary Volume Descriptor
    > ----
    >
    > Booting from floppies works OK.
    >
    > The same happens when trying to boot a CD of 5.1-RC1 that I happen to
    > still have around. 4.9-RELEASE boots fine from CD.
    >
    > Hardware is an older Dell Pentium Pro system, with a Samsung SM-532
    > DVD-ROM CD-RW drive.
    >
    > Any ideas why this happens? I've worked around it, but it's a bit
    > awkward. I can't find any details of why it happens in searching mailing
    > lists.

    The 5.x bootable install CDs no longer use floppy-emulation mode. The
    change was made because some newer machines do not support this
    emulation mode. However, older machines may not be able to boot CDs in
    "native" (non-emulation) mode. We can't support everybody, so we
    support the new machines.

    In many cases a BIOS update will fix this, so you might check for that.

    Jon

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