kern/141468: FreeBSD 8.0 boot manager can cause disk not probable

[Jin Guojun]

>Number:         141468
>Category:       kern
>Synopsis:       FreeBSD 8.0 boot manager can cause disk not probable
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Dec 15 01:00:08 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Jin Guojun
>Release:        8.0-R
>Organization:
>Environment:
Not available since disks are not bootable
>Description:
When install FreeBSD 8.0 on DELL OPTIPLEX 755 machine, installing FreeBSD 8.0 boot manager causes disk not probable (system hang forever if a SATA dirve with FreeBSD 8.0 manager installed is attached).

Before problem occurs, that is, during labling/partitioning the drive, it complains: "Disk slicing warning" --

chunk 'ad8s1' [2048..206847] does not start on a track boundary
chunk 'ad8s1' [206848..80525311] does not start on a track boundary
chunk 'ad8s1' [80526312..156301487] does not start on a track boundary

This is a 80GB dirve. Tried another 250GB dirve, similar thing happens, and both disk drives cannot be detected by the system. However, those disk drives did not send bad or error to the system, thus drive probing is hanging forever.

>How-To-Repeat:
The hanging on drive probe seems only happening to the DELL OPTIPLEX 755 machine, thus following the description to reproduce the problem.

In other system, the labling and partitioning do have problem with different disk drives -- system will not bootable, the drives are able to be detected. These issues have been discussed in questions at freebsd.org since earlier 8.0-BETA till 8.0-RC releases.
>Fix:


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