ディスク準備¶
現状で認識しているディスクを調べる
# fdisk -l
RAID1アレイがある場合の実行例(/dev/cciss/c0d0p)
Disk /dev/cciss/c0d0: 587.1 GB, 587127480320 bytes
255 heads, 32 sectors/track, 140531 cylinders, total 1146733360 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: 0xad45b20c
Device Boot Start End Blocks Id System
/dev/cciss/c0d0p1 2048 4196351 2097152 82 Linux swap / Solaris
/dev/cciss/c0d0p2 * 4196352 1146733359 571268504 83 Linux
※アレイが存在しても、このように表示されるとは限らない
RAID1アレイがある場合の実行例(/dev/sda)
Disk /dev/sda: 72.7 GB, 72746008576 bytes, 142082048 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O サイズ (最小 / 推奨): 512 バイト / 512 バイト
ディスク識別子: 0x00000080
デバイス ブート 始点 終点 ブロック Id システム
/dev/sda1 2048 4196351 2097152 82 Linux スワップ / Solaris
/dev/sda2 * 4196352 142082047 68942848 83 Linux
ディスクのパーティション設定をする
# fdisk /dev/cciss/c0d0
Command (m for help): p ※パーティションの確認
Command (m for help): d ※既存パーティションの削除
※swap領域の作成
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
Using default value 1
First sector (2048-33554431, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-33554431, default 33554431): +2G ※swapパーティションに2GB割り当てる
Partition 1 of type Linux and of size 2 GiB is set
Command (m for help): l ※パーティションタイプを確認 飛ばしても構わない
Command (m for help): t ※パーティションタイプを設定
Selected partition 1
Hex code (type L to list codes): 82 ※ partition types を Linux swap / Solarisの 82 を打つ
Changed system type of partition 1 to 82 (Linux swap / Solaris)
Command (m for help): p ※/dev/vda2 のSystemに Linux swap / Solaris が表示される事を確認
Disk /dev/vda: 17.2 GB, 17179869184 bytes, 33554432 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: 0x0d3e9626
Device Boot Start End Blocks Id System
/dev/vda1 2048 4196351 2097152 82 Linux swap / Solaris
※root領域の作成
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (1-4, default 2):
Using default value 2
First sector (4196352-33554431, default 4196352):
Using default value 4196352
Last sector, +sectors or +size{K,M,G} (4196352-33554431, default 33554431):
Using default value 33554431
Partition 2 of type Linux and of size 14 GiB is set
Command (m for help): a ※ブート可能にする
Partition number (1-4): 2
Command (m for help): p ※/dev/vda2 に * が表示される事を確認
Disk /dev/vda: 17.2 GB, 17179869184 bytes, 33554432 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: 0x0d3e9626
Device Boot Start End Blocks Id System
/dev/cciss/c0d0p1 2048 4196351 2097152 82 Linux swap / Solaris
/dev/cciss/c0d0p2 * 4196352 1146733359 571268504 83 Linux
※以下必要なだけ作成する
Command (m for help): n
Select (default p): p
First sector (14886912-78165359, default 14886912):
Using default value 14886912
Last sector, +sectors or +size{K,M,G} (14886912-78165359, default 78165359): +10G
※変更をSAVEする
Command (m for help): w
ディスクのフォーマットをする
# mkreiserfs /dev/sda2
# mkfs.ext4 /dev/sda2
スワップパーティションを初期化、有効化する
# mkswap /dev/sda1
# swapon -v /dev/sda1
ディスクのマウント:
# mkdir -p /mnt/gentoo/boot/grub
# mount /dev/sda2 /mnt/gentoo
or # mount /dev/vda2 /mnt/gentoo
Note
2TB以上のボリュームを作成する場合
parted コマンドを利用してパーティションを作成する。
# パーティションの確認
(parted) print
# 不要なパーティションの削除
(parted) rm [番号]
# 2TB以上のボリュームを作成する場合はgptラベルを貼る
(parted) mklabel gpt
# ext4で先頭500MBからディスクの最後までを使用する場合
(parted) mkpart primary ext4 500 -1s
# reiserfsでディスク全てを使用する場合
(parted) mkpart primary reiserfs 0% 100%
Note
ディスクが元々GPTだった場合
fdiskを実施するとGPTモードになってしまう。そのまま実施するとGPTディスクになりgrubの設定で躓く事がある。
gdisk
root@sysresccd /root % gdisk /dev/sda Command (? for help): r
Recovery/transformation command (? for help): g
MBR command (? for help): ?
MBR command (? for help): a Toggle active flag for partition: 2
MBR command (? for help): p #確認
MBR command (? for help): w #
Converted 3 partitions. Finalize and exit? (Y/N): y Warning: The kernel is still using the old partition table. The new table will be used at the next reboot. GPT data structures destroyed! You may now partition the disk using fdisk or other utilities.
root@sysresccd /root % root@sysresccd /root % gdisk /dev/sda GPT fdisk (gdisk) version 0.8.10
- Partition table scan:
- MBR: protective BSD: not present APM: not present GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): g b back up GPT data to a file c change a partition’s name d delete a partition i show detailed information on a partition l list known partition types n add a new partition o create a new empty GUID partition table (GPT) p print the partition table q quit without saving changes r recovery and transformation options (experts only) s sort partitions t change a partition’s type code v verify disk w write table to disk and exit x extra functionality (experts only) ? print this menu
Command (? for help): r
Recovery/transformation command (? for help): g
MBR command (? for help): ? a toggle the active/boot flag c recompute all CHS values l set partition as logical o omit partition p print the MBR partition table q quit without saving changes r set partition as primary s sort MBR partitions t change partition type code w write the MBR partition table to disk and exit
MBR command (? for help): p
** NOTE: Partition numbers do NOT indicate final primary/logical status, ** unlike in most MBR partitioning tools!
** Extended partitions are not displayed, but will be generated as required.
Disk size is 1953525168 sectors (931.5 GiB) MBR disk identifier: 0x00000000 MBR partitions:
Can Be Can Be
- Number Boot Start Sector End Sector Status Logical Primary Code
- 1 2048 16779263 primary Y Y 0x82 2 16779264 58722303 primary Y 0x83 3 58722304 1953525134 primary Y 0x8E
MBR command (? for help): a Toggle active flag for partition: 2
MBR command (? for help): p
Disk size is 1953525168 sectors (931.5 GiB) MBR disk identifier: 0x00000000 MBR partitions:
Can Be Can Be
- Number Boot Start Sector End Sector Status Logical Primary Code
- 1 2048 16779263 primary Y Y 0x82 2 * 16779264 58722303 primary Y 0x83 3 58722304 1953525134 primary Y 0x8E
MBR command (? for help):
MBR command (? for help):
MBR command (? for help):
MBR command (? for help): ? a toggle the active/boot flag c recompute all CHS values l set partition as logical o omit partition p print the MBR partition table q quit without saving changes r set partition as primary s sort MBR partitions t change partition type code w write the MBR partition table to disk and exit
MBR command (? for help): g a toggle the active/boot flag c recompute all CHS values l set partition as logical o omit partition p print the MBR partition table q quit without saving changes r set partition as primary s sort MBR partitions t change partition type code w write the MBR partition table to disk and exit
MBR command (? for help): s
MBR command (? for help): w
Converted 3 partitions. Finalize and exit? (Y/N): y Warning: The kernel is still using the old partition table. The new table will be used at the next reboot. GPT data structures destroyed! You may now partition the disk using fdisk or other utilities.