misc/155577: BTX halted after install. Reboot during installation.

[Serg]

>Number:         155577
>Category:       misc
>Synopsis:       BTX halted after install. Reboot during installation.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Mar 15 15:20:08 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Serg
>Release:        8.1
>Organization:
IT Prof Service Ltd.
>Environment:
Fresh installation of the 8.1 RELEASE
>Description:
Tried to install FreeBSD 8.1 RELEASE from .iso file (FreeBSD-8.1-RELEASE-i386-disc1.iso) on the virtual server (Microsoft). During ports collection installation (custom installation) I've got error: panic: ufs_dirbad: /mnt: bad dir ino 1107114 at offset 0: mangled entry
cpuid = 0 uptime: 6m12s
Cannot dump. Device not defined or unavailable... 
If I install FreeBSD without ports collections I've got problems after final reboot:
BTX loader 1.00 BTX version is 1.02
int=0000000d   err=00000000   efl=00010206   eip=0002e4f0
eax=ffffffff   ebx=00000000   ecx=00000000   edx=00095bb8
esi=00000000   edi=00044780   ebp=00094bf8   esp=00094bc4
cs=002b dc=0033 es=0033 fs=0033 gs=0033 ss=0033
cs:eip=01 00 c7 44 24 04 b3 07-03 00 89 1c 24 e8 6e f2
       ff ff c7 44 24 0c 03 00-00 00 c7 44 24 08 20 04
ss:esp=a0 01 00 00 a0 30 04 00-38 00 00 00 00 00 00 00
       00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
BTX halted
I can't manage virtual server, so I want to know reasons of this problem.
>How-To-Repeat:

>Fix:


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