Can not create slice on a SATA drive

[David O'Brien]

On Tue, Feb 15, 2005 at 12:47:13PM -0500, Xi.Liu wrote:
> I have Dell power edge S420 with only one SATA harddrive running FreeBSD
> 5.3-RELEASE for AMD64 platform and the system is running fine.
..
> I am trying to create a slice to use the all the rest unused disk space, but
> some how I can save the changes using "sysinstall" 
> (see error messages below)
..
>                  ??ERROR: Unable to write data to disk ad4!  ?k

Boot single user and try to create the partition.  GEOM won't allow
writes to a disk after it has been mounted.

-- 
-- David  (obrien at FreeBSD.org)