Last login: Wed Mar  6 09:32:20 on console
Mac-mini-de-Christine:~ coc014$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *80.0 GB    disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            79.2 GB    disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *1.0 TB     disk1
   1:        Apple_partition_map                         32.3 KB    disk1s1
   2:                  Apple_HFS Sauvegarde              1.0 TB     disk1s3
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *79.8 GB    disk2
   1:        Apple_partition_map                         254.0 KB   disk2s1
   2:                  Apple_HFS iPod                    79.8 GB    disk2s2
Mac-mini-de-Christine:~ coc014$ sudo umount /Volumes/iPod
Password:
Mac-mini-de-Christine:~ ccoc014$ sudo umount -f /Volumes/iPod
umount: /Volumes/iPod: not currently mounted
Mac-mini-de-Christine:~ coc014$ disktool -r
diskutil: please use diskutil(8) instead of disktool
disdiskutil: did not recognize "disktool -r"
Mac-mini-de-Christine:~ coc014$ diskutil -r
diskutil: did not recognize verb "-r"; type "diskutil" for a list
Mac-mini-de-Christine:~ coc014$ diskutil
Disk Utility Tool
Utility to manage local disks and volumes
Most options require root access to the device

Usage:  diskutil [quiet] <verb> <options>, where <verb> is as follows:

     list                  (List the partitions of a disk)
     info[rmation]         (Get information on a specific disk or partition)
     listFilesystems       (List file systems available for formatting)
     activity              (Continuous log of system-wide disk arbitration)

     u[n]mount             (Unmount a single volume)
     unmountDisk           (Unmount an entire disk (all volumes))
     eject                 (Eject a disk)
     mount                 (Mount a single volume)
     mountDisk             (Mount an entire disk (all mountable volumes))

     enableJournal         (Enable HFS+ journaling on a mounted HFS+ volume)
     disableJournal        (Disable HFS+ journaling on a mounted HFS+ volume)
     moveJournal           (Move the HFS+ journal onto another volume)
     enableOwnership       (Treat as exact User/Group IDs for a mounted volume)
     disableOwnership      (Ignore on-disk User/Group IDs for a mounted volume)

     rename[Volume]        (Rename a volume)

     verifyVolume          (Verify the file system data structures of a volume)
     repairVolume          (Repair the file system data structures of a volume)

     verifyDisk            (Verify the components of a partition map of a disk)
     repairDisk            (Repair the components of a partition map of a disk)

     verifyPermissions     (Verify the permissions of a Mac OS X volume)
     repairPermissions     (Repair the permissions of a Mac OS X volume)

     eraseDisk             (Erase an existing disk, removing all volumes)
     eraseVolume           (Erase an existing volume)
     reformat              (Erase an existing volume with same name and type)
     eraseOptical          (Erase optical media (CD/RW, DVD/RW, etc.))
     zeroDisk              (Erase a disk, writing zeros to the media)
     randomDisk            (Erase a disk, writing random data to the media)
     secureErase           (Securely erase a disk or freespace on a volume)

     partitionDisk         ((re)Partition a disk, removing all volumes)
     resizeVolume          (Resize a volume, increasing or decreasing its size)
     splitPartition        (Split an existing partition into two or more)
     mergePartitions       (Combine two or more existing partitions into one)

     appleRAID <verb>      (Perform additional verbs related to AppleRAID)
     coreStorage <verb>    (Perform additional verbs related to CoreStorage)

diskutil <verb> with no options will provide help on that verb

Mac-mini-de-Christine:~ coc014$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *80.0 GB    disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            79.2 GB    disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *1.0 TB     disk1
   1:        Apple_partition_map                         32.3 KB    disk1s1
   2:                  Apple_HFS Sauvegarde              1.0 TB     disk1s3
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *79.8 GB    disk2
   1:        Apple_partition_map                         254.0 KB   disk2s1
   2:                  Apple_HFS iPod                    79.8 GB    disk2s2
Mac-mini-de-Christine:~ coc014$ dd if=/dev/disk2 of=/dev/null bs=4m conv=noerror 2>ddlog.txt


-> j'en suis là...