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ハードディスクを増設する
2014/07/13
 
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
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Command (m for help):
p
   
# パーティションテーブル表示
Disk /dev/vdb: 21.5 GB, 21474836480 bytes, 41943040 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 label type: dos
Disk identifier: 0xd97d5b18

   Device Boot      Start         End      Blocks   Id  System
# パーティションなし

Command (m for help):
n
   
# パーティション作成

Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p):
p
   
# プライマリパーティション指定

Partition number (1-4, default 1):
1
   
# パーティション番号指定

First sector (2048-41943039, default 2048):  
# 開始セクター指定(空 Enterで最初から)

Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039):  
# 終了セクター指定(空 Enterで最後まで)

Using default value 41943039
Partition 1 of type Linux and of size 20 GiB is set
Command (m for help):
p
   
# パーティションテーブル表示
Disk /dev/vdb: 21.5 GB, 21474836480 bytes, 41943040 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 label type: dos
Disk identifier: 0xd97d5b18

   Device Boot      Start         End      Blocks   Id  System
/dev/vdb1            2048    41943039    20970496   83  Linux
# 作成された

Command (m for help):
5
   
# パーティションタイプ変更
Selected partition 1
Hex code (type L to list all codes):
L
   
# パーティションタイプ一覧表示

 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 all codes):
8e
   
# Linux LVM に変更

Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help):
p
   
# パーティションテーブル表示
Disk /dev/vdb: 21.5 GB, 21474836480 bytes, 41943040 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 label type: dos
Disk identifier: 0xd97d5b18

   Device Boot      Start         End      Blocks   Id  System
/dev/vdb1            2048    41943039    20970496   8e  Linux LVM
# 変更された

Command (m for help):
w
   
# 保存して終了
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.

[root@dlp ~]#
sfdisk -l /dev/sdb
   
# 確認


Disk /dev/vdb: 41610 cylinders, 16 heads, 63 sectors/track
sfdisk: Warning: The partition table looks like it was made
  for C/H/S=*/3/34 (instead of 41610/16/63).
For this listing I'll assume that geometry.

Units: cylinders of 52224 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls    #blocks   Id  System
/dev/vdb1         20+ 411206- 411187-  20970496   8e  Linux LVM
sfdisk:                 start: (c,h,s) expected (20,0,9) found (2,0,33)

sfdisk:                 end: (c,h,s) expected (1023,2,34) found (650,2,34)

/dev/vdb2          0       -       0          0    0  Empty
/dev/vdb3          0       -       0          0    0  Empty
/dev/vdb4          0       -       0          0    0  Empty
 
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