recovery after power outage

[Jerry McAllister]

On Fri, Feb 09, 2007 at 07:46:10AM -0500, Marty Landman wrote:

> On 2/8/07, Pieter de Goeje <pieter at degoeje.nl> wrote:
> >
> >If the slice and partition table are still intact (as they were before the
> >outage), a normal fsck -F on /dev/ad1s1a will get the pc booting again.
> 
> 
> Well I managed to get the machine booting by editing /etc/fstab
> 
> %cat /etc/fstab
> # Device                Mountpoint      FStype  Options         Dump
> Pass#
> /dev/ad0s1b             none            swap    sw              0       0
> /dev/ad0s1a             /               ufs     rw              1       1
> /dev/ad0s1d             /tmp            ufs     rw              2       2
> /dev/ad0s1f             /usr            ufs     rw              2       2
> /dev/ad0s1e             /var            ufs     rw              2       2
> #/dev/ad1s1c            /hoss           ufs     rw              2       2
> /dev/acd0               /cdrom          cd9660  ro,noauto       0       0
> 
> That's a great start, however I'd like to recover what I can from ad1s1c.
> 
> %sudo fsck -F ad1s1c
> fsck: exec fsck_unused for /dev/ad1s1c in /sbin:/usr/sbin: No such file or
> directory
> fsck: exec fsck_unused for /dev/ad1s1c in /sbin:/usr/sbin: No such file or
> directory
> 
> What is that telling me?

Never saw that before, but it looks like it can't find   /dev/ad1s1c

> You
> >can do this from a FreeBSD live cd such as FreesBIE or the fixit cd. You
> >can
> >then fsck the the rest of the filesystems in single user mode. You may
> >also
> >want to use the live CD to backup the important bits before, ehm, further
> >corrupting/restoring the filesystems. ;)
> 
> 
> Sorry Pieter I'm lost again.  Can't I use sysinstall? Fdisk?  Wish I
> understood the next steps here.

Don't confound fsck and fdisk.
Anyway, he is assuming you cannot boot and get a running system
By eliminating the /dev/ad1s1c from needing to be mounted at boot
you now have a running system that you can use to work on getting
as much as you can back from /hoss, so the fixit cd is no longer
needed (unless something else goes wrong).

> FWIW when I do a sysinstall and then use the fdisk utility I get
> 
> Disk name:      ad1                                    FDISK Partition
> Editor
> DISK Geometry:  30515 cyls/255 heads/63 sectors = 490223475 sectors
> (239366MB)
> 
> Offset       Size(ST)        End     Name  PType       Desc  Subtype
> Flags
> 
>         0        126        125        -     12     unused        0
>       126  490223412  490223537   ad1cs1      8    freebsd      165
> 490223538      11214  490234751        -     12     unused        0
> 
> Which appears that I perhaps have not totally hosed this disk up.

Did you copy/paste this or retype it in by hand - which would account
for the 'Name' column containing "ad1cs1"  rather than  "ad1s1c".  If
it was copy/paste, that looks really strange.

I am not used to looking at fdisk output from within sysinstall.
I wouldn't have thought I would see a partition name 'c' within
the fdisk slice output, but maybe I just never noticed it before.

Maybe using fdisk manually will give some more information.
>From root, run:   fdisk ad1
and see what it says.   The output should be more familiar to me.

////jerry

> 
> Marty
> 
> 
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