kern/181784: mps driver broken in 9.2 pre-release

[Xiguang Wang]

>Number:         181784
>Category:       kern
>Synopsis:       mps driver broken in 9.2 pre-release
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep 03 18:10:02 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Xiguang Wang
>Release:        9-STABLE (r255183)
>Organization:
Peking University
>Environment:
FreeBSD SVR1 9.2-PRERELEASE FreeBSD 9.2-PRERELEASE #26: Sun Aug 25 16:21:53 CST 2013     wangxg at XTYLAB_SVR1:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
I just upgraded my server(Dell T110 with SAS2008 raid controller, 1 hardware RAID-1 array) to r255103. Last time I upgraded it was at Aug. 25(see Environment), and it works fine.

After I installed the kernel(r255183), it cannot boot and stuck at mountroot prompt. It says that "mounting from ufs:/dev/da0p2 failed with error 19".

I tried typing "?" to list bootable devices, but only CD-ROM is on list, seems /dev/da0 is not recognized by the new kernel.

I then booted kernel.old, and everying is OK. So it is not my hardware problem.

I think the mps driver MFCed has some bug in it. If you need more details, please contact me via email. I normally reply in 24h.

Thank you.
>How-To-Repeat:
Find a SAS2008 card, connect a harddisk to it, install the lastest version of 9-STABLE and boot.
>Fix:
None.

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