Re: geom mirror problem

On Fri, Oct 08, 2004 at 07:13:59AM +0200, Pawel Jakub Dawidek wrote:
> On Thu, Oct 07, 2004 at 10:23:27PM +0200, John Hay wrote:
> +> > This is because ad0 is open with exclusive bit, so gmirror cannot open
> +> > it for writing and it gets (EPERM - error=1 - errno(2)).
> +> > gmirror.patch should eliminate this race.
> +> 
> +> With gmirror.patch I don't see the geom_mirror error messages, but then
> +> it doesn't finish booting:
> +> 
> +> #######################################################
> +> GEOM_MIRROR: Device gm0 created (id=861616013)
> +> GEOM_MIRROR: Device gm0: provider ad0 detected
> +> GEOM_MIRROR: Device gm0: provider ad2 detected
> +> Mounting root from ufs:/dev/mirror/gm0s1a
> +> setrootbyname failed
> +> Root mount failed: 6
> +> Manual root filesystem specification
> +> ...
> +> mountroot>
> +> #######################################################
> +> 
> +> So how do I go from here? Is there something else I can try?
> 
> I wonder how is this possible with g_mirror.c rev.1.36...
> Could you try this patch and send me the output:
> 
> 	http://people.freebsd.org/~pjd/patches/gmirror.3.patch

I just added this on top of the rest of the patches and it finished
booting! Strange, I wonder of there can still be a timing problem.
The mirror is degraded though, but it automatically started syncing
as opposed to before all the patched where I had to do a "gmirror
activate ...". I'll let it sync and then reboot again. I do have swap
inside the mirror, but have the swapoff command in rc.d/swap1.

The last part of dmesg looks like this:

#######################################################
ad0: 114473MB <ST3120022A/8.54> [232581/16/63] at ata0-master UDMA100
ad2: 114473MB <ST3120022A/8.54> [232581/16/63] at ata1-master UDMA100
GEOM_MIRROR: g_mirror_can_go: geom mirror:taste
GEOM_MIRROR: g_mirror_can_go: NULL softc
GEOM_MIRROR: g_mirror_can_go: can_go=0
GEOM_MIRROR: Device gm0 created (id=861616013).
GEOM_MIRROR: Device gm0: provider ad0 detected.
GEOM_MIRROR: Device gm0: provider ad2 detected.
GEOM_MIRROR: g_mirror_can_go: geom gm0.sync
GEOM_MIRROR: g_mirror_can_go: NULL provider
GEOM_MIRROR: g_mirror_can_go: can_go=0
GEOM_MIRROR: Device gm0: provider ad2 activated.
GEOM_MIRROR: Device gm0: provider mirror/gm0 launched.
GEOM_MIRROR: Device gm0: rebuilding provider ad0.
GEOM_MIRROR: g_mirror_can_go: geom gm0.sync
GEOM_MIRROR: g_mirror_can_go: geom is ready
GEOM_MIRROR: g_mirror_can_go: geom gm0
GEOM_MIRROR: g_mirror_can_go: geom is ready
GEOM_MIRROR: g_mirror_can_go: can_go=1
Mounting root from ufs:/dev/mirror/gm0s1a
#######################################################

And a gmirror list looks like this:
#######################################################
Geom name: gm0
State: DEGRADED
Components: 2
Balance: load
Slice: 4096
Flags: NONE
SyncID: 15
ID: 861616013
Providers:
1. Name: mirror/gm0
   Mediasize: 120034123264 (112G)
   Sectorsize: 512
   Mode: r6w5e2
Consumers:
1. Name: ad0
   Mediasize: 120034123776 (112G)
   Sectorsize: 512
   Mode: r0w1e1
   State: SYNCHRONIZING
   Priority: 0
   Flags: DIRTY, HARDCODED, SYNCHRONIZING
   SyncID: 15
   Synchronized: 7%
   ID: 460446288
2. Name: ad2
   Mediasize: 120034123776 (112G)
   Sectorsize: 512
   Mode: r6w5e3
   State: ACTIVE
   Priority: 0
   Flags: DIRTY, HARDCODED
   SyncID: 15
   ID: 3011562079

Geom name: gm0.sync
Consumers:
1. Name: mirror/gm0
   Mediasize: 120034123264 (112G)
   Sectorsize: 512
   Mode: r1w0e0
#######################################################

John
-- 
John Hay -- John.Hay_at_icomtek.csir.co.za / jhay_at_FreeBSD.org