Subject: 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 17:45:13
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
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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
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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$
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