problem grub-install after upgrade in wheezy

[fred rezkaou]

Hi

after safe-upgrade in wheezy and upgrade of grub-pc 1.9

i can't write grub in mbr .

Thansk for you help ....

#/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub
/usr/sbin/grub-probe : info :  Cannot stat `/dev/vda', skipping.
/usr/sbin/grub-probe : info :  changing current directory to /dev/mapper.
/usr/sbin/grub-probe : info :  opening vg_sys-vl_boot.
/usr/sbin/grub-probe : erreur :  no such disk.

#parted -l

Model: ATA QEMU HARDDISK (scsi)
Disk /dev/sda: 172GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End    Size    Type     File system  Flags
 1      1049kB  108GB  108GB   primary               lvm
 2      108GB   172GB  63,6GB  primary               lvm


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_sys-vl_var: 50,0GB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number  Start  End     Size    File system  Flags
 1      0,00B  50,0GB  50,0GB  ext4


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg_sys-vl_tmp: 9999MB
Sector size (logical/physical): 512B/512B
Partition Table: loop

Number  Start  End     Size    File system  Flags
 1      0,00B  9999MB  9999MB  ext4