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Innerz

[Tutoriel] Comment activer une partition avec Terminal/fdisk

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Bon... avec ce tutoriel j'ai pas inventé le fil à couper le beurre, mais ça servira à plus d'un.

 

 

1. On lance Terminal

 

2. On va lister tous les disques dur, ainsi que leurs partitions avec la commande suivante :

 

$ diskutil list

 

On devrait obtenir quelque chose de ce genre là (dans ce cas 2 disques dur "disk0" et "disk1") :

/dev/disk0
  #:							TYPE NAME				SIZE		  IDENTIFIER
  0:	 FDisk_partition_scheme								*465.8 Gi   disk0
  1:			   Apple_HFS		TimeMachine				405.2 Gi   disk0s1
  2:			   Windows_NTFS	Commun					60.5 Gi	disk0s2

/dev/disk1
  #:					   TYPE			NAME				SIZE		  IDENTIFIER
  0:	 FDisk_partition_scheme								*465.8 Gi   disk1
  1:			   Windows_NTFS		 XP					73.2 Gi	  disk1s1
  2:				  Apple_HFS		OSX					73.2 Gi	  disk1s2
  3:			   Windows_NTFS		Stockage				319.3 Gi	 disk1s3

 

On peut voir qu'OS X est installé sur "disk1s2"

 

3. Activation de la partition "disk1s2" avec "fdisk"

 

On lance l'outil "fdisk" sur le "disk1"

$ sudo fdisk -e /dev/rdisk1

 

On liste toute les commandes de "fdisk" avec "help"

fdisk: 1> help
help Command help list
manual Show entire man page for fdisk
reinit Re-initialize loaded MBR (to defaults)
auto Auto-partition the disk with a partition style
setpid Set the identifier of a given table entry
disk Edit current drive stats
edit Edit given table entry
erase Erase current MBR
flag Flag given table entry as bootable
update Update machine code in loaded MBR
select Select extended partition table entry MBR
print Print loaded MBR partition table
write Write loaded MBR to disk
exit Exit edit of current MBR, without saving changes
quit Quit edit of current MBR, saving current changes
abort Abort program without saving current changes

 

Remarque : Les commandes peuvent-être lancer juste en tapant la première lettre, ou bien en entier.

 

On liste toutes les partitions de "disk1"

fdisk: 1> p   ("p" pour print)

 

On obtient quelque chose de ce genre :

Disk: /dev/rdisk1	geometry: 60801/255/63 [976771055 sectors]
Offset: 0	Signature: 0xAA55
	 Starting	   Ending
#: id  cyl  hd sec -  cyl  hd sec [	 start -	   size]
------------------------------------------------------------------------
*1: 07	0   1   1 - 1023 254  63 [		63 -  153597402] HPFS/QNX/AUX
2: AF 1023 254  63 - 1023 254  63 [ 153597465 -  153597465] HFS+		
3: 07 1023 254  63 - 1023 254  63 [ 307194930 -  669573135] HPFS/QNX/AUX
4: 00	0   0   0 -	0   0   0 [		 0 -		  0] unused	  
fdisk: 1>

On remarque que la partition activée est marquée d'une "*", en l'occurence la partition "1" (XP, HPFS/QNX/AUX). Mais ce que l'on veut c'est activé la partition "2" (OSX, HFS+)

 

On active la partition "2"

fdisk: 1> flag 2
Partition 2 marked active.

 

On écrit sur la table de partition

fdisk:*1> write
Device could not be accessed exclusively.
A reboot will be needed for changes to take effect. OK? [n] y
Writing MBR at offset 0.

 

On quitte "fdisk"

fdisk: 1> quit

 

Il ne reste plus qu'à redémarrer en croisant les doigts, comme dirait l'ami "Kext Helper"

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