[DRBD-user] Xen DomU on DRBD device: barrier errors

Lars Ellenberg lars.ellenberg at linbit.com
Thu May 31 12:44:16 CEST 2012

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On Thu, May 31, 2012 at 12:32:08PM +0200, Wiebe Cazemier wrote:
> First, for reference, here's my VM config:
> 
> bootloader = '/usr/lib/xen-default/bin/pygrub'
> vcpus       = '2'
> memory      = '512'
> root        = '/dev/xvda2 ro'
> disk        = [
>                   'phy:/dev/drbd3,xvda2,w',
>                   'phy:/dev/universe/drbdvm-swap,xvda1,w',
>               ]
> name        = 'drbdvm'
> vif         = [ 'ip=1.2.3.4,mac=00:16:3E:22:A8:A7' ]
> on_poweroff = 'destroy'
> on_reboot   = 'restart'
> on_crash    = 'restart'
> 
> 
> 
> ----- Original Message -----
> > From: "Lars Ellenberg" <lars.ellenberg at linbit.com>
> > To: drbd-user at lists.linbit.com
> > Sent: Thursday, 31 May, 2012 12:13:41 PM
> > Subject: Re: [DRBD-user] Xen DomU on DRBD device: barrier errors
> > 
> > iirc,
> > that's a problem with xen blktap (or what it is called),
> > and supposedly fixed in later versions of that driver.
> > Or maybe it resurfaced as a regression again.
> > Workaround may be to use "phy".
> 
> I already use phy, as you can see.

I see.  Then that workaround does not work (anymore?).
Still, the problem is not in DRBD, but in the xen block driver.

Just add "-DRBD" to your googling,
should make it easier to find and not be distracted...


-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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