misc/164097: installer: always installs GPT

[Ariane van der Steldt]

>Number:         164097
>Category:       misc
>Synopsis:       installer: always installs GPT
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jan 13 19:30:10 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Ariane van der Steldt
>Release:        FreeBSD 9.0 RELEASE
>Organization:
>Environment:
FreeBSD installer

SHA256 (FreeBSD-9.0-RELEASE-amd64-bootonly.iso) = d16fd5f32c9483177a01241f37ed84f347484c65e52aba4dbf8a2f3108fb457d
>Description:
FreeBSD installer changed my MBR-only partition table to MBR+GPT partition table.

The other OS does not have GPT logic; I want to be at least warned this is happening and prefer to have the option at least. Alternatively, the installer may opt not to install a GPT if the disk does not require it (as in the case in this machine)
>How-To-Repeat:
Install FreeBSD 9.0 RELEASE next to another OS that does not have GPT (Windows XP in my case)
>Fix:
Best solution: deduce from disk size that GPT is not required and in that case, proceed to not use it
Alternative solution: ask user (for userfriendliness, tell them if the present layout does or does not use GPT)
Worst solution: warn them this is happening

>Release-Note:
>Audit-Trail:
>Unformatted: