Subject: Re: newfs problem: "cg 0: bad magic number"
To: None <tech-kern@netbsd.org>
From: Tad Hunt <tad@entrisphere.com>
List: tech-kern
Date: 07/08/2002 19:37:45
I forgot to mention, when I run newfs on partition "a", I get the
same warning, but I don't get the same error.  As you can see from the
disklabel, both partitions are the same size, so I don't understand what
might be happening.

-Tad

------------------------------------------------------------------------------
sh$ newfs /dev/rwd0a
pcmcia0: card irq established func 0x101e04 arg 0xe022faa0
Warning: inode blocks/cyl group (84) >= data blocks (28) in last
    cylinder group. This implies 456 sector(s) cannot be allocated.
/dev/rwd0a:     438480 sectors in 464 cylinders of 15 tracks, 63 sectors
        214.1MB in 29 cyl groups (16 c/g, 7.38MB/g, 1792 i/g)
super-block backups (for fsck -b #) at:
     32,  15216,  30400,  45584,  60768,  75952,  91136, 106320, 121504,
 136688, 151872, 167056, 182240, 197424, 212608, 227792, 241952, 257136,
 272320, 287504, 302688, 317872, 333056, 348240, 363424, 378608, 393792,
 408976, 424160,
pcmcia0: card irq disestablished
sh$ 
------------------------------------------------------------------------------

I previously said:
;
;System: NetBSD 1.5, powerpc
;
;I attempted to run newfs on the "c" partition of the
;following disk, and it spit out "cg 0: bad magic number".
;It also printed a warning about inodes and cylinder groups,
;which I assumed that it adjusted for.  Am I mistaken, or is
;this a bug?
;
;-Tad
;
;------------------------------------------------------------------------------
;
;sh$ disklabel wd0
;type: ESDI
;disk: DELKIN DEVICES I
;label: N20020708170926
;flags:
;bytes/sector: 512
;sectors/track: 63
;tracks/cylinder: 15
;sectors/cylinder: 945
;cylinders: 1059
;total sectors: 1000755
;rpm: 3600
;interleave: 1
;trackskew: 0
;cylinderskew: 0
;headswitch: 0           # microseconds
;track-to-track seek: 0  # microseconds
;drivedata: 0 
;
;8 partitions:
;#        size   offset     fstype   [fsize bsize   cpg]
;  a:   438937        1     4.2BSD     1024  8192    16   # (Cyl.    0*- 464*)
;  c:   438937   438938     4.2BSD     1024  8192    16   # (Cyl.  464*- 928*)
;  d:  1000755        0     unused        0     0         # (Cyl.    0 - 1058)
;  e:   122880   877875     4.2BSD     1024  8192    16   # (Cyl.  928*- 1058)
;disklabel: boot block size 0
;
;------------------------------------------------------------------------------
;
;
;sh$ newfs /dev/rwd0c
;Warning: inode blocks/cyl group (84) >= data blocks (28) in last
;    cylinder group. This implies 456 sector(s) cannot be allocated.
;/dev/rwd0c:     438480 sectors in 464 cylinders of 15 tracks, 63 sectors
;        214.1MB in 29 cyl groups (16 c/g, 7.38MB/g, 1792 i/g)
;super-block backups (for fsck -b #) at:
;     32,  15216,  30400,  45584,  60768,  75952,  91136, 106320, 121504,
; 136688, 151872, 167056, 182240, 197424, 212608, 227792, 241952, 257136,
; 272320, 287504, 302688, 317872, 333056, 348240, 363424, 378608, 393792,
; 408976, 424160,
;cg 0: bad magic number
;cg 0: bad magic number
;sh$
;
;------------------------------------------------------------------------------
;