NB-ExtHDD

NetBSD の外付けハードディスク（HDD）の初期化の仕方

# fdisk sd0
fdisk: Cannot determine the number of heads
Disk: /dev/rsd0d
NetBSD disklabel disk geometry:
cylinders: 991, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

BIOS disk geometry:
cylinders: 991, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

Partition table:
0: Primary 'big' DOS, 16-bit FAT (> 32MB) (sysid 6)
   start 63, size 2030049 (991 MB, Cyls 0/1/32-991/16/32), Active
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>

# fdisk -u /dev/sd0
fdisk: Cannot determine the number of heads
Disk: /dev/sd0d
NetBSD disklabel disk geometry:
cylinders: 991, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

BIOS disk geometry:
cylinders: 991, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

Do you want to change our idea of what BIOS thinks? [n] y

Geometries of known disks:
Disk 0: cylinders 1024, heads 27, sectors 63 (156301488 sectors, 76319MB)

BIOS's idea of #cylinders: [0..1024 default: 991] 
BIOS's idea of #heads: [0..256 default: 64] 
BIOS's idea of #sectors: [1..63 default: 32] 
Disk: /dev/sd0d
NetBSD disklabel disk geometry:
cylinders: 991, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

BIOS disk geometry:
cylinders: 991, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

Are you happy with this choice? [n] y

Partition table:
0: Primary 'big' DOS, 16-bit FAT (> 32MB) (sysid 6)
    start 63, size 2030049 (991 MB, Cyls 0/1/32-991/16/32), Active
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
Which partition do you want to change?: [none] 0
The data for partition 0 is:
Primary 'big' DOS, 16-bit FAT (> 32MB) (sysid 6)
    start 63, size 2030049 (991 MB, Cyls 0/1/32-991/16/32), Active
sysid: [0..255 default: 6] 169
start: [0..992cyl default: 63, 0cyl, 0MB] 
size: [0..992cyl default: 2030049, 991cyl, 991MB] 
bootmenu: [] start1
The bootselect code is not installed, do you want to install it now? [n] 

Partition table:
0: NetBSD (sysid 169)
    start 63, size 2030049 (991 MB, Cyls 0/1/32-991/16/32), Active
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
Which partition do you want to change?: [none] 

Installed bootfile doesn't support required options.
Update the bootcode from /usr/mdec/mbr? [n] 

We haven't written the MBR back to disk yet.  This is your last chance.
Partition table:
0: NetBSD (sysid 169)
    start 63, size 2030049 (991 MB, Cyls 0/1/32-991/16/32), Active
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
Should we write new partition table? [n] y
# 
# 
# 
# 

# sync
# fdisk /dev/sd0
Disk: /dev/sd0d
NetBSD disklabel disk geometry:
cylinders: 991, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

BIOS disk geometry:
cylinders: 992, heads: 64, sectors/track: 32 (2048 sectors/cylinder)
total sectors: 2031120

Partition table:
0: NetBSD (sysid 169)
    start 63, size 2030049 (991 MB, Cyls 0/1/32-991/16/32), Active
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
#  

パーティションの設定

# disklabel -e /dev/sd0