Re: cgd breakage

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Tue, Aug 18, 2015 at 06:16:48PM +0000, Michael van Elst wrote:
> prlw1%cam.ac.uk@localhost (Patrick Welche) writes:
> 
> >I've been running a Sun Aug 9 2015 7.99.20/amd64 kernel with /home on
> >cgd. I just rebooted with one built just now with up to date source, and
> >fsck complains:
> 
> >** /dev/rcgd0a
> >BAD SUPER BLOCK: CAN'T FIND SUPERBLOCK
> 
> 
> Any more details about it? In particular about underlying disk
> geometry?

$ disklabel -t raid4
raid7|Automatically generated label:\
        :dt=RAID:se#512:ns#128:nt#8:sc#1024:nc#204800:\
        :pa#209715136:oa#64:ta=cgd:\
        :pc#209715200:oc#0:\
        :pd#209715200:od#0:
$ disklabel -t cgd0
cgd2|Automatically generated label:\
        :dt=cgd:se#512:ns#2048:nt#1:sc#2048:nc#102400:\
        :pa#209715136:oa#0:ta=4.2BSD:ba#0:fa#0:\
        :pc#209715136:oc#0:\
        :pd#209715136:od#0:

(They were renamed at some point in the past.)

# dumpfs cgd0 | more
file system: /dev/rcgd0d
format  FFSv2
endian  little-endian
location 65536  (-b 128)
magic   19540119        time    Tue Aug 18 23:28:29 2015
superblock location     65536   id      [ 52aaca14 332f69d1 ]
cylgrp  dynamic inodes  FFSv2   sblock  FFSv2   fslevel 5
nbfree  3656735 ndir    22073   nifree  12533902        nffree  9735
ncg     554     size    52428784        blocks  50828787
bsize   16384   shift   14      mask    0xffffc000
fsize   2048    shift   11      mask    0xfffff800
frag    8       shift   3       fsbtodb 2
bpg     11830   fpg     94640   ipg     22976
...

Are those the right sort of details?


Cheers,

Patrick