LBA and CHS parameters of my FBSD partition differ!

[Ted Mittelstaedt]

Well, your skirting the thin edge since you obviously have a dual-boot
system - but if a fsck of the FreeBSD partition, and a chkdsk /f of the
XP partition turn up nothing, your probably fine.

What is going on is your motherboard BIOS is old, and doesen't understand
disk drives that report more than

cylinders             16383
heads                 16
sectors/track         63

and furthermore doesen't understand LBA mode all that well either.
Basically,
the OS (either Windows or FreeBSD) does a BIOS call at boot to figure out
the
size of the disk, and what they are both getting back differs from what
the
drive reports when the disk driver queries it directly.

If your motherboard is reasonably supported the manufacturer may have a
BIOS update that might fix this.  Otherwise, if everything is working,
leave well enough alone.

The failure that can result if your not lucky is that one OS scribbles on
the others space on the disk.

For people that only run a single OS on the computer, these error
messages
can be ignored - unless, that is, after installation, the FreeBSD
partition
fails to boot.

Ted

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org
> [mailto:owner-freebsd-questions at freebsd.org]On Behalf Of Marcello
> Maggioni
> Sent: Saturday, May 14, 2005 4:09 PM
> To: freebsd-questions at freebsd.org
> Subject: LBA and CHS parameters of my FBSD partition differ!
>
>
> Hi all,
>
> I have FreeBSD 5.4 installed after a buildworld from 5.3 .
>
> The problem is that during the setup of the system a warning message
> appeared and notified me something about "Wrong disk geometry" or
> something like that. I ignored the message and installed the system
> which booted and worked fine .
>
> Today, from my WinXP disk I loaded Partition Magic 8 and this warned
> me that my FBSD partition has different LBA and CHS parameters and
> that this is wrong, because these two should be identical and asked me
> if I would like to correct this. I answered no, bue what should I do?
> Why there is this incongruency in these 2 parameters?
>
> Thanks
>
> Marcello
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