kern/151910: [zfs] booting from raidz/raidz2 on ciss(4) doesn't work

[Andriy Gapon]

The following reply was made to PR kern/151910; it has been noted by GNATS.

From: Andriy Gapon <avg at icyb.net.ua>
To: Emil Smolenski <am at raisa.eu.org>
Cc: bug-followup at FreeBSD.org
Subject: Re: kern/151910: [zfs] booting from raidz/raidz2 on ciss(4) doesn't
 work
Date: Fri, 05 Nov 2010 19:38:26 +0200

 on 05/11/2010 17:10 Emil Smolenski said the following:
 > The following reply was made to PR kern/151910; it has been noted by GNATS.
 > 
 > From: "Emil Smolenski" <am at raisa.eu.org>
 > To: bug-followup at freebsd.org, am at raisa.eu.org
 > Cc:  
 > Subject: Re: kern/151910: [zfs] booting from raidz/raidz2 on ciss(4) doesn't
 >  work
 > Date: Fri, 05 Nov 2010 15:45:39 +0100
 > 
 >  Please see at "Originator" field in both PRs. I'm familiar with PR 148655  
 >  very well.
 >  
 >  Problem in PR 148655 is related to booting from _degraded_  
 >  raidz/raidz2/mirror. In this PR we have problem with booting from  
 >  _non_degraded_ raidz/raidz2 and only when ciss(4) is used. Mirror-based  
 >  configurations, SATA disks, USB sticks, other RAID controllers are all OK.
 >  
 >  Of course I tested 8.1-STABLE (from Oct) and 8.0-RELEASE (where PR 148655  
 >  is not applicable) but there were no difference -- still can't boot from  
 >  raidz or raidz2.
 
 Apologies for missing that important information.
 It looks like this might be some exotic issue about ciss, BIOS (and ciss's option
 ROM) and how our boot code accesses/enumerates BIOS-visible disks.
 
 -- 
 Andriy Gapon