Salut,
Merci etxeberrizahar ! C’est bien ce qu’il me semblait.
En tout état de cause j’avais lancé l’opération.
[code][10:31:12][root@debian] ~ # fdisk -l
Disk /dev/sda: 20.0 GB, 20020396032 bytes
255 heads, 63 sectors/track, 2434 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000f22c2
Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        1275    10240000   83  Linux
/dev/sda2            1275        2434     9309184    5  Extended
/dev/sda5            1276        1467     1536000   82  Linux swap / Solaris
/dev/sda6            1467        2434     7771136   83  Linux
Disk /dev/sdb: 8019 MB, 8019509248 bytes
247 heads, 62 sectors/track, 1022 cylinders
Units = cylinders of 15314 * 512 = 7840768 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000d0ce1
Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1         130      989183+  83  Linux
Partition 1 has different physical/logical endings:
phys=(1023, 3, 32) logical=(129, 46, 10)
Partition 1 does not end on cylinder boundary.
/dev/sdb2             130        1023     6842368    5  Extended
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(123, 37, 43) logical=(129, 46, 11)
Partition 2 has different physical/logical endings:
phys=(974, 250, 44) logical=(1022, 196, 44)
Partition 2 does not end on cylinder boundary.
/dev/sdb5             130         330     1536000   82  Linux swap / Solaris
/dev/sdb6             331         879     4198400   83  Linux
Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00045394
Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1         487     3906560   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sdc2             487      121602   972854272    5  Extended
/dev/sdc5           32997      121602   711720960   83  Linux
/dev/sdc6             487       24709   194562048   83  Linux
/dev/sdc7           24709       32996    66568192   83  Linux
Partition table entries are not in disk order
[10:31:19][root@debian] ~ #
[/code]
[10:33:29][root@debian] ~ # mount -t ext3 /dev/sdc5 /media
[10:35:57][root@debian] ~ # mount -t ext4 /dev/sda1 /mnt
[code][10:41:02][root@debian] ~ # time rsync -arvi /media/pc-2_backup/racine/15102013_12h20/ /mnt/
…
sent 6400073523 bytes  received 2809624 bytes  11956831.27 bytes/sec
total size is 6389244011  speedup is 1.00
real	8m54.688s
user	1m42.226s
sys	2m4.500s
[10:47:42][root@debian] ~ #
[/code]
Il me reste la home, quelques retouches en fstab et un update-grub2.