kern/119868: [zfs] 7.0 kernel panic during boot with ZFS and WD1600JS

[Harald Hanche-Olsen]

The following reply was made to PR kern/119868; it has been noted by GNATS.

From: Harald Hanche-Olsen <hanche at math.ntnu.no>
To: johan at giantfoo.org
Cc: bug-followup at FreeBSD.org
Subject: Re: kern/119868: [zfs] 7.0 kernel panic during boot with ZFS and
 WD1600JS
Date: Wed, 01 Oct 2008 17:18:31 +0200 (CEST)

 + Johan A. van Zanten <johan at giantfoo.org>:
 
 > The problem for me is that the panic occured very early in the boot
 > process, before the dump device is normally configured, and no one
 > on the freebsd-help list, nor anyone reading these bug reports
 > seemed to know or care enough to help me get a dump device
 > configured earlier.
 
 Well, the handbook gives a method that it says is "deprecated"
 
 http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html
 
 (specifying a dump device in the kernel config), but these lines from
 /usr/src/usr.sbin/config/config.y
 
 System_spec:
         CONFIG System_id System_parameter_list
           = { errx(1, "%s:%d: root/dump/swap specifications obsolete",
               yyfile, yyline);}
 
 make me think that the handbook itself is obsolete at this point, and
 the "deprecated" method is no longer available.
 
 If you still have the disk and wish to resurrect it, you can try my
 method: I booted from a ubuntu cd and erased the EFI partition table
 using dd if=/dev/zero bs=512 count=1 seek=1 of=/dev/disk/by-id/...
 (making VERY sure I did not clobber the wrong disk).
 
 - Harald