recovery after power outage

Marty Landman martster at
Thu Feb 8 02:08:06 UTC 2007

On 2/7/07, Pieter de Goeje <pieter at> wrote:
> ad1s1c is a partition that contains the entire disk or slice in this case.
> Dangerously dedicated is when you have no slices: ad1a, ad1b, ad1c etc.
> You
> should _only_ fsck the individual partitions (ad0s1a), never the complete
> disk (ad0) or individual slices (ad0s1). You may risk destroying your
> filesystem(s) if you do so. Unless ofcourse you know what you're doing and
> you have placed a filesystem directly on either the disk or the slice it
> self.

I see, thanks for explaining that. If I can recover this disk then I'll
partition it into a couple of slices and mount each of those instead of what
I was now doing.

> /dev/ad1s1c: NOT LABELED AS A BSD FILE SYSTEM (unused)
> Yes, ad1s1c is normally not used as a filesystem, so you would better not
> fsck
> it.

Oops, then what can I do?

> Also it won't reboot now, although I've run fsck complete including on
> > ads0. Do I have to edit /etc/fstab so ads1 isn't mounted to get a good
> > boot? Unfortunately /usr isn't getting mounted and I have not editor
> > available afaik.
> It should not be necessary to edit /etc/fstab. However after what you've
> described above it might be necessary to restore the partition table, mbr
> and
> slice table to get your system booting again.

Could you please be more explicit Pieter?  I don't know how to do any of
that. Yikes!


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