dumpfs [filesys | special-device]

dumpfs displays the super block and cylinder group information for the file system or special device specified.
file system information such as the file system block size and minimum free space percentage.

magic	11954	time	Sat Jun 23 20:52:50 2007
cylgrp	dynamic	inodes	4.4BSD
nbfree	251914	ndir	2	nifree	251708	nffree	9
ncg	57	ncyl	508	size	1039832	blocks	1007667
bsize	4096	shift	12	mask	FFFFF000
fsize	1024	shift	10	mask	FFFFFC00
frag	4	shift	2	fsbtodb	1
cpg	9	bpg	4608	fpg	18432	ipg	4416
minfree	5%	optim	time	maxcontig	32	maxbpg	1024
rotdelay	0 ms	headswitch	0us	trackseek	0us	rps	60
ntrak	128	nsect	32	npsect	32	spc	4096
symlinklen	60	trackskew	0	interleave	1	contigsumsize	16
nindir	1024	inopb	32	nspf	2
sblkno	16	cblkno	24	iblkno	28	dblkno	580
sbsize	2048	cgsize	4096	cgoffset	16	cgmask	FFFFFF80
csaddr	580	cssize	1024	shift	8	mask	FFFFFF00
cgrotor	0	fmod	0	ronly	0	clean	1

blocks available in each of 8 rotational positions
cylinder number 0:
   position 0:      0    4    8   12   …   496  500  504  508
   position 2:      1    5    9   13   …   497  501  505  509
   position 4:      2    6   10   14   …   498  502  506  510 
   position 6:      3    7   11   15   …   499  503  507  511

cs[].cs_(nbfree,ndir,nifree,nffree):
        (4461,1,4413,6) (4467,0,4416,0) (4467,0,4416,0) ...  (4467,0,4416,0) (1769,0,4416,0) 
cylinders in last group 4
blocks in last group 2048

cg 0 1 2 3 4 5 6 7 8  …   54 55 56:



cg 0:
magic   90255   tell    00006000    time    Sat Jun 23 20:48:27 2007
cgx     0       ncyl    9       niblk   4416    ndblk   18432 nbfree  4461    
ndir    1       nifree  4413    nffree  6
rotor   0       irotor  0       frotor  0 
frsum   0       0       2       sum of frsum: 6
clusters 1-15:  0      ... 0
clusters size 16 and over: 1 clusters free:  147-4607 
iused:  0-2 free:   581-583, 585-18431
b:
   c0:  (365)    91 91 91 92
...
   c8:  (512)    128 128 128 128

cg 1:
magic   90255   tell    0120a000 time    Sat Jun 23 20:48:27 2007
cgx     1       ncyl    9       niblk   4416    ndblk   18432 nbfree  4467    
ndir    0       nifree  4416    nffree  0
rotor   0       irotor  0       frotor  0 
frsum   0       0       0       sum of frsum: 0
clusters 1-15:  0   0   0   0   0   0    0   1   0   0   0  0   0    0    0
clusters size 16 and over: 1 clusters free:  0-7, 149-4607 
iused: free:   0-31, 596-18431
b:
   c0:  (371)    92 93 93 93
...
   c8:  (512)    128 128 128 128



cg 2:
magic   90255   tell    0240e000 time    Sat Jun 23 20:48:27 2007
cgx     2       ncyl    9       niblk   4416    ndblk   18432 nbfree  4467    
ndir    0       
rotor   0       irotor  0       frotor  0 
frsum   0       0       0

clusters 1-15:   0    ...    0
clusters size 16 and over: 1 clusters free:  0-11, 153-4607 
iused: free:   0-47, 612-18431
b:
   c0:  (371)    92 93 93 93
...
   c8:  (512)    128 128 128 128

cg	tell	niblk	ndblk	nbfree	clusters free	i free
3	03612000				0-15, 157-4607	0-63, 628-18431
4	04816000				0-19, 161-4607	0-79, 644-18431
5	05a1a000				0-23, 165-4607	0-95, 660-18431
6	06c1e000				0-27, 169-4607	0-111, 676-18431
7	07e22000				0-31, 173-4607	0-127, 692-18431
8	09026000				0-35, 177-4607	0-143, 708-18431
9	0a22a000				0-39, 181-4607	0-159, 724-18431
10	0b42e000				0-43, 185-4607	0-175, 740-18431
11	0c632000				0-47, 189-4607	0-191, 756-18431
12	0d836000				0-51, 193-4607	0-207, 772-18431
13	0ea3a000				0-55, 197-4607	0-223, 788-18431
14	0fc3e000				0-59, 201-4607	0-239, 804-18431
15	10e42000				0-63, 205-4607	0-255, 820-18431
16	12046000				0-67, 209-4607	0-271, 836-18431
17	1324a000				0-71, 213-4607	0-287, 852-18431
18	1444e000				0-75, 217-4607	0-303, 868-18431
19	15652000				0-79, 221-4607	0-319, 884-18431
20	16856000	4416	*1	*X	0-83, 225-4607	0-335, 900-18431
21	17a5a000				0-87, 229-4607	0-351, 916-18431
22	18c5e000				0-91, 233-4607	0-367, 932-18431
23	19e62000				0-95, 237-4607	0-383, 948-18431
24	1b066000	*4	*1	*X	0-99, 241-4607	0-399, 964-18431
25	1c26a000	*4	*1	*X	0-103, 245-4607	0-415, 980-18431
26	1d46e000	*4	*1	*X	0-107, 249-4607	0-431, 996-18431
27	1e672000	*4	*1	*X	0-111, 253-4607	0-447, 1012-18431
28	1f876000	*4	*1	*X	0-115, 257-4607	0-463, 1028-18431
29	20a7a000	*4	*1	*X	0-119, 261-4607	0-479, 1044-18431
30	21c7e000	*4	*1	*X	0-123, 265-4607	0-495, 1060-18431
31	22e82000	*4	*1	*X	0-127, 269-4607	0-511, 1076-18431
32	24086000	*4	*1	*X	0-131, 273-4607	0-527, 1092-18431
33	2528a000	*4	*1	*X	0-135, 277-4607	0-543, 1108-18431
34	2648e000	*4	*1	*X	0-139, 281-4607	0-559, 1124-18431
35	27692000	*4	*1	*X	0-143, 285-4607	0-575, 1140-18431
36	28896000	*4	*1	*X	0-147, 289-4607	0-591, 1156-18431
37	29a9a000	*4	*1	*X	0-151, 293-4607	0-607, 1172-18431
38	2ac9e000	*4	*1	*X	0-155, 297-4607	0-623, 1188-18431
39	2bea2000	*4	*1	*X	0-159, 301-4607	0-639, 1204-18431
40	2d0a6000	*4	*1	*X	0-163, 305-4607	0-655, 1220-18431
41	2e2aa000	*4	*1	*X	0-167, 309-4607	0-671, 1236-18431
42	2f4ae000	*4	*1	*X	0-171, 313-4607	0-687, 1252-18431
43	306b2000	*4	*1	*X	0-175, 317-4607	0-703, 1268-18431
44	318b6000	*4	*1	4466	0, 2-179, 321-4607	0-3, 5-719, 1284-18431	ndir user:1 nifree 4415 nffree 3 frsum 00 1 uusum of frsum: 3 clusters 1-8: 1 00 0 0 0 0 0 Sat Jun 23 20:52:45 2007 c0: (370) 92 92 93 93
45	32aba000	*4	*1	*X	0-183, 325-4607	0-735, 1300-18431
46	33cbe000	*4	*1	*X	0-187, 329-4607	0-751, 1316-18431
47	34ec2000	*4	*1	*X	0-191, 333-4607	0-767, 1332-18431
48	360c6000	*4	*1	*X	0-195, 337-4607	0-783, 1348-18431
49	372ca000	*4	*1	*X	0-199, 341-4607	0-799, 1364-18431
50	384ce000	*4	*1	*X	0-203, 345-4607	0-815, 1380-18431
51	396d2000	*4	*1	*X	0-207, 349-4607	0-831, 1396-18431
52	3a8d6000	*4	*1	*X	0-211, 353-4607	0-847, 1412-18431
53	3bada000	*4	*1	*X	0-215, 357-4607	0-863, 1428-18431
54	3ccde000	*4	*1	*X	0-219, 361-4607	0-879, 1444-18431
55	3dee2000	*4	*1	*X	0-223, 365-4607	0-895, 1460-18431
56	3f0e6000	*4	7640	1769	0-227, 369-1909	0-911, 1476-7639	ncyl 4

*¹ = 18432
*⁴ = 4416
X⁴ = 4467