Can't add new 1TB disk in FreeBSD 6.1

[Jerry McAllister]

On Mon, Oct 06, 2008 at 08:03:46AM -0700, Don O'Neil wrote:

> > I just swapped out an old 500G disk with a 1TB one and I'm trying to 
> > label it and mount it...
> > 
> > If I run bsdlabel -w ad4, I get:
> > 
> > bsdlabel: Geom not found
> > 
> > If I run sysinstall, it tells me that it can't write to the disk.
> > 
> > I've tried an old 'bypass': sysctl kern.geom.debugflags=16, but that 
> > didn't help.
> > 
> > Can anyone help me get this new disk installed without having to boot 
> > off a recovery CD? The server is 500 miles away from me and I don't 
> > have direct console access.
> > Can you provide output from dmesg, as well as "geom disk list"?
> 
> OK... I tried:
> 
> # dd if=/dev/zero of=/dev/ad4 bs=512 count=1000
> dd: /dev/ad4: Operation not permitted
> 
> # fdisk /dev/ad4
> ******* Working on device /dev/ad4 *******
> parameters extracted from in-core disklabel are:
> cylinders=1938021 heads=16 sectors/track=63 (1008 blks/cyl)
> 
> Figures below won't work with BIOS for partitions not in cyl 1
> parameters to be used for BIOS calculations are:
> cylinders=1938021 heads=16 sectors/track=63 (1008 blks/cyl)
> 
> fdisk: invalid fdisk partition table found
> Media sector size is 512
> Warning: BIOS sector numbering starts with sector 1
> Information from DOS bootblock is:
> The data for partition 1 is:
> sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
>     start 63, size 1953525105 (953869 Meg), flag 80 (active)
>         beg: cyl 0/ head 1/ sector 1;
>         end: cyl 612/ head 15/ sector 63
> The data for partition 2 is:
> <UNUSED>
> The data for partition 3 is:
> <UNUSED>
> The data for partition 4 is:
> <UNUSED>


OK.   That looks pretty normal.

Did you try doing an:     fdisk -I ad4   or  maybe  fdisk -BI ad4

It takes that to get fdisk to initialize the disk.
(the -B puts the master boot block there.

Just doing an    fdisk ad4   only had fdisk read out stuff
and there isn't anything there yet to read - so of course
it is invalid.

////jerry



> 
> Geometry output:
> 
> Geom name: ad4
> Providers:
> 1. Name: ad4
>    Mediasize: 1000204886016 (932G)
>    Sectorsize: 512
>    Mode: r0w0e0
>    fwsectors: 63
>    fwheads: 16
> 
> Nothing exciting coming from dmesg.
> 
> 
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