| 15 | | |
| 16 | | = GRUB2 = |
| 17 | | == reduce grub entry == |
| 18 | | * WindowsとLinuxのマルチブート -> Windowsを消してシングルブート化 |
| 19 | | |
| 20 | | 1. 元の状態 |
| 21 | | * fdisk -lu /dev/sda |
| 22 | | {{{ |
| 23 | | Disk /dev/sda: 120.0 GB, 120034123776 bytes |
| 24 | | 255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors |
| 25 | | Units = sectors of 1 * 512 = 512 bytes |
| 26 | | Sector size (logical/physical): 512 bytes / 512 bytes |
| 27 | | I/O size (minimum/optimal): 512 bytes / 512 bytes |
| 28 | | Disk identifier: 0x36ea3e05 |
| 29 | | |
| 30 | | Device Boot Start End Blocks Id System |
| 31 | | /dev/sda1 63 524351 262144+ 82 Linux swap / Solaris |
| 32 | | Partition 1 does not end on cylinder boundary. |
| 33 | | /dev/sda2 524352 42467392 20971520+ 7 HPFS/NTFS |
| 34 | | /dev/sda3 42467393 234441647 95987127+ 83 Linux |
| 35 | | }}} |
| 36 | | * OSのインストールは、Windows 7 -> Ubuntu 10.04の順 |
| 37 | | * grep menuentry /boot/grub/grub.cfg | tr \" \' | cut -d\' -f2 |
| 38 | | {{{ |
| 39 | | Ubuntu, with Linux 2.6.32-33-generic |
| 40 | | Ubuntu, with Linux 2.6.32-33-generic (recovery mode) |
| 41 | | Ubuntu, with Linux 2.6.32-32-generic |
| 42 | | Ubuntu, with Linux 2.6.32-32-generic (recovery mode) |
| 43 | | Ubuntu, with Linux 2.6.32-31-generic |
| 44 | | Ubuntu, with Linux 2.6.32-31-generic (recovery mode) |
| 45 | | Memory test (memtest86+) |
| 46 | | Memory test (memtest86+, serial console 115200) |
| 47 | | Windows 7 (loader) (on /dev/sda2) |
| 48 | | }}} |
| 49 | | 1. NTFSパーティションの削除 |
| 50 | | * root@Microknoppix:~# fdisk /dev/sdb |
| 51 | | {{{ |
| 52 | | |
| 53 | | Device Boot Start End Blocks Id System |
| 54 | | /dev/sdb1 1 33 262144+ 82 Linux swap / Solaris |
| 55 | | Partition 1 does not end on cylinder boundary. |
| 56 | | /dev/sdb2 * 33 2644 20971520+ 7 HPFS/NTFS |
| 57 | | /dev/sdb3 2644 14594 95987127+ 83 Linux |
| 58 | | |
| 59 | | Command (m for help): d |
| 60 | | Partition number (1-4): 2 |
| 61 | | |
| 62 | | Command (m for help): d |
| 63 | | Partition number (1-4): 3 |
| 64 | | |
| 65 | | Command (m for help): n |
| 66 | | Command action |
| 67 | | e extended |
| 68 | | p primary partition (1-4) |
| 69 | | p |
| 70 | | Partition number (1-4): 2 |
| 71 | | First cylinder (33-14593, default 33): |
| 72 | | Using default value 33 |
| 73 | | Last cylinder, +cylinders or +size{K,M,G} (33-14593, default 14593): |
| 74 | | Using default value 14593 |
| 75 | | |
| 76 | | Command (m for help): w |
| 77 | | }}} |
| 78 | | {{{ |
| 79 | | Device Boot Start End Blocks Id System |
| 80 | | /dev/sdb1 63 524351 262144+ 82 Linux swap / Solaris |
| 81 | | Partition 1 does not end on cylinder boundary. |
| 82 | | /dev/sdb2 524352 234436544 116956096+ 83 Linux |
| 83 | | }}} |
| 84 | | 1. backupしておいたdisk imageからLinuxパーティションを書き戻し |
| 85 | | * root@Microknoppix:~# dd if=/media/sda/bb.sda bs=512 skip=42467393 of=/dev/sdb2 |
| 86 | | {{{ |
| 87 | | 191974255+0 records in |
| 88 | | 191974255+0 records out |
| 89 | | 98290818560 bytes (98 GB) copied, 3223.76 s, 30.5 MB/s |
| 90 | | }}} |
| 91 | | 1. 正常には起動しなくなるため、grubから手動でUbuntuを起動する |
| 92 | | * 以下の様に、grub consoleに落ちる |
| 93 | | {{{ |
| 94 | | grub rescue> set |
| 95 | | prefix=(hd0,3)/boot/grub |
| 96 | | root=(hd0,3) |
| 97 | | }}} |
| 98 | | * [http://d.hatena.ne.jp/syque/20110225/1298618896 Ubuntu で grub rescue -> grub-install を実行して grub を修復 - 新芽の手、ほんとの手] |
| 99 | | * 上記サイトに倣い、以下のようにしてGRUBメニューを起動する |
| 100 | | {{{ |
| 101 | | set prefix=(hd0,2)/boot/grub |
| 102 | | insmod (hd0,2)/boot/grub/normal.mod |
| 103 | | normal |
| 104 | | }}} |
| 105 | | * これで、以前のGRUB起動メニューが表示される |
| 106 | | * 通常通り起動 |
| 107 | | 1. grubを修復する |
| 108 | | * sudo grub-install /dev/sda |
| 109 | | {{{ |
| 110 | | Installation finished. No error reported. |
| 111 | | }}} |
| 112 | | * sudo update-grub |
| 113 | | {{{ |
| 114 | | Generating grub.cfg ... |
| 115 | | Found linux image: /boot/vmlinuz-2.6.32-33-generic |
| 116 | | Found initrd image: /boot/initrd.img-2.6.32-33-generic |
| 117 | | Found linux image: /boot/vmlinuz-2.6.32-32-generic |
| 118 | | Found initrd image: /boot/initrd.img-2.6.32-32-generic |
| 119 | | Found linux image: /boot/vmlinuz-2.6.32-31-generic |
| 120 | | Found initrd image: /boot/initrd.img-2.6.32-31-generic |
| 121 | | Found memtest86+ image: /boot/memtest86+.bin |
| 122 | | done |
| 123 | | }}} |
| 124 | | 1. GRUBメニュー修復完了 |
| 125 | | * grep menuentry /boot/grub/grub.cfg | tr \" \' | cut -d\' -f2 |
| 126 | | {{{ |
| 127 | | Ubuntu, with Linux 2.6.32-33-generic |
| 128 | | Ubuntu, with Linux 2.6.32-33-generic (recovery mode) |
| 129 | | Ubuntu, with Linux 2.6.32-32-generic |
| 130 | | Ubuntu, with Linux 2.6.32-32-generic (recovery mode) |
| 131 | | Ubuntu, with Linux 2.6.32-31-generic |
| 132 | | Ubuntu, with Linux 2.6.32-31-generic (recovery mode) |
| 133 | | Memory test (memtest86+) |
| 134 | | Memory test (memtest86+, serial console 115200) |
| 135 | | }}} |
| 136 | | 1. 適宜、Filesystemの伸張をする |
| 137 | | * df -h / |
| 138 | | {{{ |
| 139 | | Filesystem Size Used Avail Use% Mounted on |
| 140 | | /dev/sda2 93G 33G 56G 37% / |
| 141 | | }}} |
| 142 | | * sudo resize2fs /dev/sda2 |
| 143 | | {{{ |
| 144 | | resize2fs 1.41.11 (14-Mar-2010) |
| 145 | | Filesystem at /dev/sda2 is mounted on /; on-line resizing required |
| 146 | | old desc_blocks = 6, new_desc_blocks = 7 |
| 147 | | Performing an on-line resize of /dev/sda2 to 29239024 (4k) blocks. |
| 148 | | The filesystem on /dev/sda2 is now 29239024 blocks long. |
| 149 | | }}} |
| 150 | | * df -h / |
| 151 | | {{{ |
| 152 | | Filesystem Size Used Avail Use% Mounted on |
| 153 | | /dev/sda2 110G 33G 72G 32% / |
| 154 | | }}} |
