ハードディスクを増設する2014/04/25

ハードディスクを増設した場合のパーティション作成です。

以下は、1台の SATA HDD が搭載されたマシンに、新たにもう1台 SATA HDD を増設し、増設した HDD 内に LVMパーティションを作成する場合を例示します。 HDDの物理的な増設手順については割愛し、パーティション作成のみを例とします。

root@dlp:~#

fdisk /dev/sdb

# 増設したHDDのパーティション操作モードに入る

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xd70e2fb8.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help):

# パーティションテーブル表示

Disk /dev/sdb: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders, total 167772160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd70e2fb8

   Device Boot      Start         End      Blocks   Id  System

# なにもない

Command (m for help):

# パーティション作成

Command action
e extended
p primary partition (1-4)
Select (default p):

# プライマリ指定

Partition number (1-4):

# パーティション番号指定

First sector (2048-167772159, default 2048):

# 開始地点指定（空Enterで最初から）

Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-167772159, default 167772159):

# 終了地点（空Enterで最後まで）

Using default value 167772159

Command (m for help):

# パーティションテーブル表示

Disk /dev/sdb: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders, total 167772160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd70e2fb8

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   167772159    83885056   83  Linux

Command (m for help):

# タイプ変更

Selected partition 1
Hex code (type L to list codes):

# タイプ一覧表示

 0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris
 1  FAT12           27  Hidden NTFS Win 82  Linux swap / So c1  DRDOS/sec (FAT-
 2  XENIX root      39  Plan 9          83  Linux           c4  DRDOS/sec (FAT-
 3  XENIX usr       3c  PartitionMagic  84  OS/2 hidden C:  c6  DRDOS/sec (FAT-
 4  FAT16 <32M      40  Venix 80286     85  Linux extended  c7  Syrinx
 5  Extended        41  PPC PReP Boot   86  NTFS volume set da  Non-FS data
 6  FAT16           42  SFS             87  NTFS volume set db  CP/M / CTOS / .
 7  HPFS/NTFS/exFAT 4d  QNX4.x          88  Linux plaintext de  Dell Utility
 8  AIX             4e  QNX4.x 2nd part 8e  Linux LVM       df  BootIt
 9  AIX bootable    4f  QNX4.x 3rd part 93  Amoeba          e1  DOS access
 a  OS/2 Boot Manag 50  OnTrack DM      94  Amoeba BBT      e3  DOS R/O
 b  W95 FAT32       51  OnTrack DM6 Aux 9f  BSD/OS          e4  SpeedStor
 c  W95 FAT32 (LBA) 52  CP/M            a0  IBM Thinkpad hi eb  BeOS fs
 e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a5  FreeBSD         ee  GPT
 f  W95 Ext'd (LBA) 54  OnTrackDM6      a6  OpenBSD         ef  EFI (FAT-12/16/
10  OPUS            55  EZ-Drive        a7  NeXTSTEP        f0  Linux/PA-RISC b
11  Hidden FAT12    56  Golden Bow      a8  Darwin UFS      f1  SpeedStor
12  Compaq diagnost 5c  Priam Edisk     a9  NetBSD          f4  SpeedStor
14  Hidden FAT16 <3 61  SpeedStor       ab  Darwin boot     f2  DOS secondary
16  Hidden FAT16    63  GNU HURD or Sys af  HFS / HFS+      fb  VMware VMFS
17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE
18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fd  Linux raid auto
1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fe  LANstep
1c  Hidden W95 FAT3 75  PC/IX           be  Solaris boot    ff  BBT
1e  Hidden W95 FAT1 80  Old Minix

Hex code (type L to list codes):

# Linux LVM 番号指定

Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help):

# パーティションテーブル表示

Disk /dev/sdb: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders, total 167772160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd70e2fb8

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   167772159    83885056   8e  Linux LVM

Command (m for help):

# 保存して終了

The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

root@dlp:~#

sfdisk -l /dev/sdb

# 状態表示

Disk /dev/sdb: 10443 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 440320 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls    #blocks   Id  System
/dev/sdb1          2+ 195083- 195082-  83885056   8e  Linux LVM
                start: (c,h,s) expected (2,32,9) found (0,32,33)
                end: (c,h,s) expected (1023,85,10) found (203,85,10)
/dev/sdb2          0       -       0          0    0  Empty
/dev/sdb3          0       -       0          0    0  Empty
/dev/sdb4          0       -       0          0    0  Empty