Changes between Version 20 and Version 21 of TipAndDoc/boot/GRUB

Timestamp:

Nov 25, 2011 11:49:00 PM (14 years ago)

Author:

mitty

Comment:

move from ../

TipAndDoc/boot/GRUB

@@ -2 +2 @@
 
  = Kernel Boot Options =
- == GRUB ==
  * https://help.ubuntu.com/community/Grub2
 
@@ -22 +21 @@
  > GRUB_CMDLINE_LINUX_DEFAULT="quiet nosplash" にすればOKでした。
   * "nosplash"だけでも可
+
+ = reduce grub entry =
+ * WindowsとLinuxのマルチブート -> Windowsを消してシングルブート化
+
+ 1. 元の状態
+  * fdisk -lu /dev/sda
+{{{
+Disk /dev/sda: 120.0 GB, 120034123776 bytes
+255 heads, 63 sectors/track, 14593 cylinders, total 234441648 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: 0x36ea3e05
+
+   Device Boot      Start         End      Blocks   Id  System
+/dev/sda1              63      524351      262144+  82  Linux swap / Solaris
+Partition 1 does not end on cylinder boundary.
+/dev/sda2          524352    42467392    20971520+   7  HPFS/NTFS
+/dev/sda3        42467393   234441647    95987127+  83  Linux
+}}}
+  * OSのインストールは、Windows 7 -> Ubuntu 10.04の順
+  * grep menuentry /boot/grub/grub.cfg | tr \" \' | cut -d\' -f2
+{{{
+Ubuntu, with Linux 2.6.32-33-generic
+Ubuntu, with Linux 2.6.32-33-generic (recovery mode)
+Ubuntu, with Linux 2.6.32-32-generic
+Ubuntu, with Linux 2.6.32-32-generic (recovery mode)
+Ubuntu, with Linux 2.6.32-31-generic
+Ubuntu, with Linux 2.6.32-31-generic (recovery mode)
+Memory test (memtest86+)
+Memory test (memtest86+, serial console 115200)
+Windows 7 (loader) (on /dev/sda2)
+}}}
+ 1. NTFSパーティションの削除
+  * root@Microknoppix:~# fdisk /dev/sdb
+{{{
+
+   Device Boot      Start         End      Blocks   Id  System
+/dev/sdb1               1          33      262144+  82  Linux swap / Solaris
+Partition 1 does not end on cylinder boundary.
+/dev/sdb2   *          33        2644    20971520+   7  HPFS/NTFS
+/dev/sdb3            2644       14594    95987127+  83  Linux
+
+Command (m for help): d
+Partition number (1-4): 2
+
+Command (m for help): d
+Partition number (1-4): 3
+
+Command (m for help): n
+Command action
+   e   extended
+   p   primary partition (1-4)
+p
+Partition number (1-4): 2
+First cylinder (33-14593, default 33):
+Using default value 33
+Last cylinder, +cylinders or +size{K,M,G} (33-14593, default 14593):
+Using default value 14593
+
+Command (m for help): w
+}}}
+{{{
+   Device Boot      Start         End      Blocks   Id  System
+/dev/sdb1              63      524351      262144+  82  Linux swap / Solaris
+Partition 1 does not end on cylinder boundary.
+/dev/sdb2          524352   234436544   116956096+  83  Linux
+}}}
+ 1. backupしておいたdisk imageからLinuxパーティションを書き戻し
+  * root@Microknoppix:~# dd if=/media/sda/bb.sda bs=512 skip=42467393 of=/dev/sdb2
+{{{
+191974255+0 records in
+191974255+0 records out
+98290818560 bytes (98 GB) copied, 3223.76 s, 30.5 MB/s
+}}}
+ 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
+  * 以下の様に、grub consoleに落ちる
+{{{
+grub rescue> set
+prefix=(hd0,3)/boot/grub
+root=(hd0,3)
+}}}
+  * [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]
+  * 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
+{{{
+set prefix=(hd0,2)/boot/grub
+insmod (hd0,2)/boot/grub/normal.mod
+normal
+}}}
+   * これで、以前のGRUB起動メニューが表示される
+  * 通常通り起動
+ 1. grubを修復する
+  * sudo grub-install /dev/sda
+{{{
+Installation finished. No error reported.
+}}}
+  * sudo update-grub
+{{{
+Generating grub.cfg ...
+Found linux image: /boot/vmlinuz-2.6.32-33-generic
+Found initrd image: /boot/initrd.img-2.6.32-33-generic
+Found linux image: /boot/vmlinuz-2.6.32-32-generic
+Found initrd image: /boot/initrd.img-2.6.32-32-generic
+Found linux image: /boot/vmlinuz-2.6.32-31-generic
+Found initrd image: /boot/initrd.img-2.6.32-31-generic
+Found memtest86+ image: /boot/memtest86+.bin
+done
+}}}
+ 1. GRUBメニュー修復完了
+  * grep menuentry /boot/grub/grub.cfg | tr \" \' | cut -d\' -f2
+{{{
+Ubuntu, with Linux 2.6.32-33-generic
+Ubuntu, with Linux 2.6.32-33-generic (recovery mode)
+Ubuntu, with Linux 2.6.32-32-generic
+Ubuntu, with Linux 2.6.32-32-generic (recovery mode)
+Ubuntu, with Linux 2.6.32-31-generic
+Ubuntu, with Linux 2.6.32-31-generic (recovery mode)
+Memory test (memtest86+)
+Memory test (memtest86+, serial console 115200)
+}}}
+ 1. 適宜、Filesystemの伸張をする
+  * df -h /
+{{{
+Filesystem            Size  Used Avail Use% Mounted on
+/dev/sda2              93G   33G   56G  37% /
+}}}
+  * sudo resize2fs /dev/sda2
+{{{
+resize2fs 1.41.11 (14-Mar-2010)
+Filesystem at /dev/sda2 is mounted on /; on-line resizing required
+old desc_blocks = 6, new_desc_blocks = 7
+Performing an on-line resize of /dev/sda2 to 29239024 (4k) blocks.
+The filesystem on /dev/sda2 is now 29239024 blocks long.
+}}}
+  * df -h /
+{{{
+Filesystem            Size  Used Avail Use% Mounted on
+/dev/sda2             110G   33G   72G  32% /
+}}}