--- On Wed, 1/19/11, Richard Elling wrote:
> From: Richard Elling
> Subject: Re: [zfs-discuss] kernel panic on USB disk power loss
> To: "Reginald Beardsley"
> Cc: zfs-discuss@opensolaris.org
> Date: Wednesday, January 19, 2011, 8:59 AM
> On Jan 15, 2011, at 10:33 AM,
> Reginald Beardsley wrote:
>
> > I was copying a filesystem using "zfs send | zfs
> receive" and inadvertently unplugged the power to the USB
> disk that was the destination. Much to my
> horror this caused the system to panic. I recovered
> fine on rebooting, but it *really* unnerved me.
> >
> > I don't find anything about this online. I would
> expect it would trash the copy operation, but the panic
> seemed a bit extreme.
> >
> > It's an Ultra 20 running Solaris 10 Generic_137112-02
> >
> > I've got a copy of U8 I'm planning to install as the
> U9 license seems to prohibit my using it.
> >
> > Suggestions? I'd like to understand what
> happened and why the system went down.
>
> Long, long ago the default failure mode for failed writes
> was panic.
> This was changed for several years ago with the
> introduction of the
> "failmode" property. Since ZFS is ported to Solaris
> 10, perhaps the
> failmode property is not available until you upgrade?
> To see:
> zpool get all poolname
> If there is no failmode property, then upgrade.
> -- richard
>
>
Thanks. That probably explains it. The last update on the system was before
ZFS root was available. I'm in the long delayed process of upgrading to U8 and
taking my main network offline w/ just a minimal system connected to the
Internet. The browsers are just too vulnerable.
Eventually I'll migrate to OpenIndiana for all my Solaris instances. But for
now mirrored ZFS on U8 will have to do since U9 is So Larry's.
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