J'avais un système avec Windows 7 installé dessus. Pour installer Ubuntu 12.04 LTS, j'ai installé Grub. Maintenant Ubuntu fonctionne bien. Mais le menu de démarrage Grub au démarrage du système n'affiche pas Windows 7, après une installation réussie d'Ubuntu.
Voici la sortie de l'application sudo fdisk -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x71c30ce5
Device Boot Start End Blocks Id System
/dev/sda1 63 80324 40131 12 Compaq diagnostics
Partition 1 does not start on physical sector boundary.
/dev/sda2 81920 29044735 14481408 7 HPFS/NTFS/exFAT
/dev/sda3 * 29044736 522272767 246614016 7 HPFS/NTFS/exFAT
/dev/sda4 522274814 976764927 227245057 f W95 Ext'd (LBA)
Partition 4 does not start on physical sector boundary.
/dev/sda5 522274816 651298815 64512000 7 HPFS/NTFS/exFAT
/dev/sda6 665636864 709464063 21913600 7 HPFS/NTFS/exFAT
/dev/sda7 808998912 976764927 83883008 7 HPFS/NTFS/exFAT
/dev/sda8 651300864 665634815 7166976 82 Linux swap / Solaris
/dev/sda9 709466112 808984575 49759232 83 Linux
Partition table entries are not in disk order
omitting empty partition (6)
Disk /dev/sdb: 32.0 GB, 32017047552 bytes
255 heads, 63 sectors/track, 3892 cylinders, total 62533296 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: 0x71c30ccf
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 16775167 8386560 84 OS/2 hidden C: drive
/dev/sdb2 16777214 62531583 22877185 5 Extended
/dev/sdb5 16777216 54396927 18809856 83 Linux