Re: Problems with raidframe under NetBSD-5.1/i386

[Greg Oster <oster%cs.usask.ca@localhost>]

On Thu, 6 Jan 2011 10:05:17 -0800
buhrow%lothlorien.nfbcal.org@localhost (Brian Buhrow) wrote:

>       hello Greg.  When the component failed, I just got an error:
> raid2: io error on /dev/sd10a, marking /dev/sd10a as failed!
> No messages from the drive itself.  It's an SCSI disk attached to an
> LSI mpt(4) card, who's driver Im trying to improve in the advent of
> problematic disk behavior.  However, this drive is good, I believe,
> and I can read and write to the disk itself without problems.  

To all sectors, or just through the filesystem?

> I suspect I'm having kmem allocation problems inside Raiframe, I've
> been here before, :), but I'm not sure of that.  I did test with
> NetBSD-5.0 with kernel sources fom  June 2009, which is what I've
> been running in production around here, just to make sure the new
> parity map stuff wasn't the problem.  It doesn't reconstruct there
> either.  So, what ever is wrong, it's an old problem, and probably a
> pilot error at that.

Hmm.. so if you bump up the size of NKMEMPAGES (or whatever) does the
reconstruction succeed?  How large are these components, and how much
RAM in the system?

> Do you know the magic to turn off -werror for
> individual kernel builds?

Not off the top of my head, no...

Later...

Greg Oster

> On Jan 6, 11:50am, Greg Oster wrote:
> } Subject: Re: Problems with raidframe under NetBSD-5.1/i386
> } On Thu, 6 Jan 2011 09:42:41 -0800
> } buhrow%lothlorien.nfbcal.org@localhost (Brian Buhrow) wrote:
> } 
> } >   Hello.  I have a box running NetBSD-5.1/i386 with kernel
> } > sources from 1/4/2011 which refuses to reconstruct to what looks
> like } > a perfectly good disk.  The errormessages are:
> } > 
> } > Command:
> } > root#raidctl -R /dev/sd10a raid2
> } > 
> } > Error messages from the kernel:
> } > raid2: initiating in-place reconstruction on column 4
> } > raid2: Recon write failed!
> } > raid2: reconstruction failed.
> } 
> } Is there anything else in /var/log/messsages about this?  Did the
> } component fail before with write errors?
> } 
> } > So, I realize this isn't a lot to go on, so I've been trying to
> build } > a kernel with some debugging in it.
> } > 
> } > Configured a kernel with:
> } > options DEBUG
> } > options   RF_DEBUG_RECON
> } > 
> } > But the kernel won't build because the Dprintf statements that get
> } > turned on in the rf_reconstruct.c file when the second option is
> } > enabled causes gcc to emit warnings.  
> } 
> } Ug.  Those should probably be fixed, although I don't suspect many
> } people use them....
> } 
> } >   So, rather than fixing the warnings, and potentially
> breaking } > something else, my question is, how can I turn off
> -werror in the } > build process for just this kernel?  Looking in
> the generated } > Makefile didn't provide enlightenment and I don't
> really want to } > disable this option for my entire tree.  But, I
> imagine, this is an } > easy and often-wanted thing to do. -thanks
> } > -Brian
> } 
> } 
> } Later...
> } 
> } Greg Oster
> >-- End of excerpt from Greg Oster
> 


Later...

Greg Oster