du coup je ne sais plus quoi faire après
diskutil cs resizeStack 01229F5B-895B-4FE9-A8F9-CB7037EE4867 250g jhfs+ SOS 0b
-bash-3.2# diskutil cs resizeStack 01229F5B-895B-4FE9-A8F9-CB7037EE4867 250g jhfs+ SOS 0b
Started CoreStorage operation on disk0
Checking prerequisites for resizing Logical-Physical volume stack
Shrinking Logical-Physical volume stack
Checking file system
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Checking volume bitmap
Checking volume information
The volume Macintosh HD appears to be OK
Shrinking file system
Shrinking Logical Volume
Resizing Core Storage Logical Volume structures
Resized Core Storage Logical Volume to 249999998976 bytes
Shrinking Core Storage Physical Volume from 319213174784 to 250371227648 bytes
Shrinking Core Storage data structures
Resizing Core Storage Physical Volume structures
Resized Core Storage Physical Volume to 250371227648 bytes
Copying booter
Shrinking partition for Physical Volume and adding new partitions
Modifying partition map
Initialized /dev/rdisk0s4 as a 64 GB HFS Plus volume with a 8192k journal
Mounting disk
Finished CoreStorage operation on disk0
-bash-3.2#
diskutil list
-bash-3.2# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *320.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 250.4 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s5
4: Apple_HFS SOS 68.8 GB disk0s4
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD *250.0 GB disk1
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme *1.4 GB disk2
1: Apple_partition_map 30.7 KB disk2s1
2: Apple_Driver_ATAPI 2.0 KB disk2s2
3: Apple_HFS Mac OS X Base System 1.4 GB disk2s3
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk3
/dev/disk4
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk4
/dev/disk5
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk5
/dev/disk6
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk6
/dev/disk7
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk7
/dev/disk8
#: TYPE NAME SIZE IDENTIFIER
0: untitled *6.3 MB disk8
/dev/disk9
#: TYPE NAME SIZE IDENTIFIER
0: untitled *2.1 MB disk9
/dev/disk10
#: TYPE NAME SIZE IDENTIFIER
0: untitled *1.0 MB disk10
/dev/disk11
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk11
/dev/disk12
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk12
/dev/disk13
#: TYPE NAME SIZE IDENTIFIER
0: untitled *1.0 MB disk13
-bash-3.2#
4: Apple_HFS SOS 68.8 GB disk0s4
diskutil eraseVolume jhfs+ SOS disk0s4