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Soucis pour le secteur d'amoçage -- Grub


acounamatataa
05/09/2015, 09h42
Bonjour,

Mon serveur a céssé de fonctionner, le supprot technique de OVH m'ont répondu qu'on doit récupérer le GRUB mais ils ne peuvent pas intervenir ! je n'ai pas trouvé de tuto officiel, quelqu'un peut m'aider svp ?
PS: j'ai accès au mode rescue, mais le montage de la section sda2 (systeme) ne fonctionne plus !!

voilà une liste de commande que j'ai tapé pour facilité la compréhension du problème:
root@rescue:/# parted -l
Model: LSI Logical Volume (scsi)
Disk /dev/sda: 1999GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
1 20.5kB 1049kB 1029kB primary bios_grub
2 2097kB 52.4GB 52.4GB ext2 primary
3 52.4GB 1788GB 1736GB ext4 primary
4 1788GB 1789GB 1073MB linux-swap(v1) primary
5 1789GB 1999GB 210GB primary


root@rescue:/# mount /dev/sda1 /mnt/
mount: block device /dev/sda1 is write-protected, mounting read-only
NTFS signature is missing.
Failed to mount '/dev/sda1': Invalid argument
The device '/dev/sda1' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
root@rescue:/# mount /dev/sda2 /mnt/
mount: wrong fs type, bad option, bad superblock on /dev/sda2,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

root@rescue:/# dmesg | tail
EXT2-fs (sda1): error: can't find an ext2 filesystem on dev sda1.
EXT4-fs (sda1): VFS: Can't find ext4 filesystem
cramfs: wrong magic
FAT-fs (sda1): bogus number of reserved sectors
FAT-fs (sda1): Can't find a valid FAT filesystem
FAT-fs (sda1): bogus number of reserved sectors
FAT-fs (sda1): Can't find a valid FAT filesystem
ISOFS: Unable to identify CD-ROM format.
EXT4-fs (sda2): ext4_check_descriptors: Block bitmap for group 0 not in group (block 2553887680)!
EXT4-fs (sda2): group descriptors corrupted!


Cdlt