qnap:/tmp# mkfs.minix -1 -v minix.disk 

272 inodes
800 blocks
Firstdatazone=21 (21)
Zonesize=1024
Maxsize=2147483647



qnap:/tmp# cat badblocks 
100
101
102
103
104
105
106
107
108
109
100


qnap:/tmp# mkfs.minix -1  -l badblocks  minix.disk 
288 inodes
800 blocks
Firstdatazone=13 (13)
Zonesize=1024
Maxsize=268966912

11 bad blocks

inodes = blocks / 3
inode size = 32
direct size = 32 (max length = 30)

00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................| << boot block
*
00000400  20 01 20 03 01 00 01 00  0d 00 00 00 00 1c 08 10  | . .............| << super block
00000410  8f 13 01 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

0120 nodes
0320 zones
0001 inode map blocks
0001 zone map blocks
000d first data zone
0000 log 2 (zone size / block size)
10081c00 -- max file size
138f -- magic
0001 -- state


/* minix_super_block.s_state */
#define MINIX_VALID_FS       0x0001          /* Clean fs. */
#define MINIX_ERROR_FS       0x0002          /* fs has errors. */


#define MINIX_SUPER_MAGIC    0x137F          /* minix V1 fs, 14 char names */
#define MINIX_SUPER_MAGIC2   0x138F          /* minix V1 fs, 30 char names */

#define MINIX2_SUPER_MAGIC   0x2468	     /* minix V2 fs, 14 char names */
#define MINIX2_SUPER_MAGIC2  0x2478	     /* minix V2 fs, 30 char names */

#define MINIX3_SUPER_MAGIC   0x4d5a          /* minix V3 fs (60 char names) */


00000420  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000800  07 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................| << inode map  7 = 0x0000 0111 -- node 0, node 1, node 2
00000810  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000820  00 00 00 00 fe ff ff ff  ff ff ff ff ff ff ff ff  |................|
00000830  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00000c00  07 00 00 00 00 00 00 00  00 00 00 ff 03 00 00 00  |................| << zone map { blocks 0, blocks 1, block 2 }, 
00000c10  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000c60  00 00 f0 ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
00000c70  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00001000  ed 41 00 00 60 00 00 00  cf d4 c4 55 00 02 0d 00  |.A..`......U....| << inode 1
00001010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00001020  00 80 00 00 00 2c 00 00  cf d4 c4 55 00 01 64 00  |.....,.....U..d.| << inode 2
00001030  65 00 66 00 67 00 68 00  69 00 6a 00 0e 00 00 00  |e.f.g.h.i.j.....|
00001040  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*

block d
00003400  01 00 2e 00 00 00 00 00  00 00 00 00 00 00 00 00  |................| << { 1, . }
00003410  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00003420  01 00 2e 2e 00 00 00 00  00 00 00 00 00 00 00 00  |................| << { 1, .. }
00003430  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00003440  02 00 2e 62 61 64 62 6c  6f 63 6b 73 00 00 00 00  |...badblocks....| << { 2, .badblocks }
00003450  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*

block e
00003800  6b 00 6c 00 6d 00 00 00  00 00 00 00 00 00 00 00  |k.l.m...........| << indirect block
00003810  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000c8000






symbolic links: regular file but only 1 block is allowed.  block stores raw text (may be a dangling link).

white out, fifo, unix domain socket, etc:
no blocks on disk.

character device, block device:
zone 0 stores the major/minor device type.  No blocks on disk.