GPT table is corrupt

Question

Bonjour,

J'essaie en vain de creer une table de partition GPT !mais je me retrouve systematiquement avec un joli :
The backup GPT table is corrupt, but the primary appears OK, so that will be used.
Si je met la table en type dos, ça fonctionne, je peux creer une partition, écrire dessus etc.

Seulement dés que je tente de changer le type de partition (gparted, parted /dev/sdX mklabel gpt, gdisk -> o ou fdisk -> g) je me retrouve avec cette erreur.

J'ai redémaré,  sudo partprobe, suivi les instructions ici : https://wiki.archlinux.org/index.php/Fdisk#Recover_GPT_header mais toujours le méme probléme.

J'ai fais un dd if=/dev/zero of=/dev/sdX que j'ai laissé tourner un moment puis couper a l'arache.

J'ai cassé qq chose ? Je peux réparé ? :):)
Je m'y prend mal pour changer le type de partition, ou un concept m'échape ?

Merci d'avance de votre aide !

darkleopard · Answer

couper un pc brutalement pendant une remise à zéro d'un disque dur, faut être suicidaire....
pourquoi tu l'as pas laissé terminer.???

si tu ne peux rien faire en gpt mais qu'en mbr si, alors c'est que tu fais une fausse manipulation quelque part.
Si ça marche dans un mode, ça fonctionne aussi dans l'autre.
ou t'as un bug avec Gparted.

Exileur · Answer

Bon, testdisk ne fait pas ce à quoi je m'attendais. 

On repart de zero. 

Je formate le disque : 
$ sudo gdisk /dev/sdbGPT fdisk (gdisk) version 1.0.1Caution: invalid backup GPT header, but valid main header; regeneratingbackup header from main header.Partition table scan:MBR: protectiveBSD: not presentAPM: not presentGPT: damagedCaution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but diskverification and recovery are STRONGLY recommended.Command (? for help): rRecovery/transformation command (? for help): xExpert command (? for help): zAbout to wipe out GPT on /dev/sdb. Proceed? (Y/N): YGPT data structures destroyed! You may now partition the disk using fdisk orother utilities.Blank out MBR? (Y/N): Y

Etat du disque : 
$ sudo partprobe$ sudo fdisk /dev/sdb -lDisk /dev/sdb: 29,8 GiB, 31981568000 bytes, 62464000 sectorsUnits: sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytes


Je relance gdisk, il recréé la table GPT et je cree les partitions : 
$ sudo gdisk /dev/sdbGPT fdisk (gdisk) version 1.0.1Partition table scan:MBR: not presentBSD: not presentAPM: not presentGPT: not presentCreating new GPT entries.Command (? for help): nPartition number (1-128, default 1): 1First sector (34-62463966, default = 2048) or {+-}size{KMGTP}: Last sector (2048-62463966, default = 62463966) or {+-}size{KMGTP}: +1MCurrent type is 'Linux filesystem'Hex code or GUID (L to show codes, Enter = 8300): EF02Changed type of partition to 'BIOS boot partition'Command (? for help): nPartition number (2-128, default 2): First sector (34-62463966, default = 4096) or {+-}size{KMGTP}: Last sector (4096-62463966, default = 62463966) or {+-}size{KMGTP}: +50MCurrent type is 'Linux filesystem'Hex code or GUID (L to show codes, Enter = 8300): EF00Changed type of partition to 'EFI System'Command (? for help): nPartition number (3-128, default 3): 3First sector (34-62463966, default = 106496) or {+-}size{KMGTP}: Last sector (106496-62463966, default = 62463966) or {+-}size{KMGTP}: Current type is 'Linux filesystem'Hex code or GUID (L to show codes, Enter = 8300): 0700Changed type of partition to 'Microsoft basic data'Command (? for help): wFinal checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTINGPARTITIONS!!Do you want to proceed? (Y/N): YOK; writing new GUID partition table (GPT) to /dev/sdb.The operation has completed successfully.


Je formate les volumes : 
$ sudo mkfs.vfat -F 32 /dev/sdb2mkfs.fat 4.1 (2017-01-24)$ sudo mkfs.ntfs /dev/sdb3 -QCluster size has been automatically set to 4096 bytes.Creating NTFS volume structures.mkntfs completed successfully. Have a nice day.


Je sauvegarde la nouvelle table GPT dans le backup. 
$ sudo gdisk /dev/sdbGPT fdisk (gdisk) version 1.0.1Caution: invalid backup GPT header, but valid main header; regeneratingbackup header from main header.Warning! Main and backup partition tables differ! Use the 'c' and 'e' optionson the recovery & transformation menu to examine the two tables.Warning! One or more CRCs don't match. You should repair the disk!Partition table scan:MBR: protectiveBSD: not presentAPM: not presentGPT: damagedCaution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but diskverification and recovery are STRONGLY recommended. Command (? for help): rRecovery/transformation command (? for help): cWarning! This will probably do weird things if you've converted an MBR toGPT form and haven't yet saved the GPT! Proceed? (Y/N): YCaution! After loading partitions, the CRC doesn't check out!Recovery/transformation command (? for help): eWarning! This will probably do weird things if you've converted an MBR toGPT form and haven't yet saved the GPT! Proceed? (Y/N): YRecovery/transformation command (? for help): wFinal checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTINGPARTITIONS!!Do you want to proceed? (Y/N): YOK; writing new GUID partition table (GPT) to /dev/sdb.The operation has completed successfully.


Et voila l'état de mon disque : 
sudo fdisk /dev/sdb -lThe backup GPT table is corrupt, but the primary appears OK, so that will be used.Disk /dev/sdb: 29,8 GiB, 31981568000 bytes, 62464000 sectorsUnits: sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisklabel type: gptDisk identifier: AC127AC6-17EE-4B5E-A480-6FD8DAC37B98Device Start End Sectors Size Type/dev/sdb1 2048 4095 2048 1M BIOS boot/dev/sdb2 4096 106495 102400 50M EFI System/dev/sdb3 106496 62463966 62357471 29,8G Microsoft basic data

Toujours la méme chose ...

Exileur · Answer

Bon j'ai tout essayé, 
- gdisk, parted.

Je suis tombé sur le post d'un type qui avait le méme probléme que moi, qui avait laissé tombé l'idée de fixer l'erreur tant que son boot fonctionnait.

Donc je supprime tout, je recreer les table en suivant lexemple ici -> https://www.slivermetal.org/2016/09/18/how-to-create-an-hybrid-uefi-gpt-bios-gptmbr-boot-usb-disk/ 

Et je me retrouve au final avec :
GPT fdisk (gdisk) version 1.0.1Caution: invalid backup GPT header, but valid main header; regeneratingbackup header from main header.Warning! Main and backup partition tables differ! Use the 'c' and 'e' optionson the recovery & transformation menu to examine the two tables.Warning! One or more CRCs don't match. You should repair the disk!Partition table scan:  MBR: hybrid  BSD: not present  APM: not present  GPT: damagedFound valid MBR and corrupt GPT. Which do you want to use? (Using theGPT MAY permit recovery of GPT data.) 1 - MBR 2 - GPT 3 - Create blank GPTYour answer: 2Disk /dev/sdb: 62464000 sectors, 29.8 GiBLogical sector size: 512 bytesDisk identifier (GUID): EBD706CA-DD10-4060-9252-F6C616FF35D9Partition table holds up to 128 entriesFirst usable sector is 34, last usable sector is 62463966Partitions will be aligned on 2048-sector boundariesTotal free space is 2014 sectors (1007.0 KiB)Number  Start (sector)    End (sector)  Size       Code  Name   1            2048            4095   1024.0 KiB  EF02  BIOS boot partition   2            4096          106495   50.0 MiB    EF00  EFI System   3          106496        25272319   12.0 GiB    0700  Microsoft basic data   4        25272320        62463966   17.7 GiB    0700  Microsoft basic data

J'ai toujours ce message de GPT damaged, mais j'arrive quand méme à boot En UEFI ou BIOS.

A plus

jns55 · Answer

Bonjour,
Tu as essayé avec gparted ?
Menu Périphérique/Créer une table des partitions sélectionne le format gpt.
Ensuite crée tes nouvelles partitions toujours avec gparted.

Mais tu perds tout le contenu du disque.

GPT table is corrupt

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