I am running OS X Lion and my laptop has a 320GB drive. I bought a larger drive (750GB) and cloned the entire device from the old drive to the new using GNU ddrescue. After cloning everything looks fine but of course I have a lot of free space.
Initially, resizing the original 320GB partions using Disk Utility was not successful dragging the partition to the full disk size and pressing “Apply” changed nothing), so inspired by this answer (which gave me the promise of being able to recreate my recovery partition), I tried to delete the recovery partition first to make sure there was no partition in the way for the resize. Still, resizing (enlarging) the partition is not possible.
Listing the partition map using diskutil looks like this:
$ diskutil list /dev/disk2
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *750.2 GB disk2
1: EFI 209.7 MB disk2s1
2: Apple_HFS Macintosh HD 319.7 GB disk2s2
Trying to resize from the command line I started to have a look at the limits for resizing:
$ diskutil resizeVolume /dev/disk2s2 limits
For device disk2s2 Macintosh HD:
Current size: 319.7 GB (319728959488 Bytes)
Minimum size: 319.1 GB (319106846720 Bytes)
Maximum size: 319.7 GB (319728959488 Bytes)
So for some reason, I am not allowed to resize the filesystem in /dev/disk2s2 to use the full capacity of the drive.
Any ideas why there is this limit and how to surpass it?
Here is the diskutil info of the drive:
$ diskutil info /dev/disk2
Device Identifier: disk2
Device Node: /dev/disk2
Part of Whole: disk2
Device / Media Name: ST975042 0AS Media
Volume Name: Not applicable (no file system)
Mounted: Not applicable (no file system)
File System: None
Content (IOContent): GUID_partition_scheme
OS Can Be Installed: No
Media Type: Generic
Protocol: USB
SMART Status: Not Supported
Total Size: 750.2 GB (750156374016 Bytes) (exactly 1465149168 512-Byte-Blocks)
Volume Free Space: Not applicable (no file system)
Device Block Size: 512 Bytes
Read-Only Media: No
Read-Only Volume: Not applicable (no file system)
Ejectable: Yes
Whole: Yes
Internal: No
OS 9 Drivers: No
Low Level Format: Not supported
and here is the diskutil info of the problematic partition:
$ diskutil info /dev/disk2s2
Device Identifier: disk2s2
Device Node: /dev/disk2s2
Part of Whole: disk2
Device / Media Name: Customer
Volume Name: Macintosh HD
Escaped with Unicode: Macintosh%FF%FE%20%00HD
Mounted: Yes
Mount Point: /Volumes/Macintosh HD 1
Escaped with Unicode: /Volumes/Macintosh%FF%FE%20%00HD%FF%FE%20%001
File System Personality: Journaled HFS+
Type (Bundle): hfs
Name (User Visible): Mac OS Extended (Journaled)
Journal: Journal size 24576 KB at offset 0x15e51000
Owners: Disabled
Partition Type: Apple_HFS
OS Can Be Installed: Yes
Media Type: Generic
Protocol: USB
SMART Status: Not Supported
Volume UUID: 1914E88D-9558-3DBD-8254-9936B20E907A
Total Size: 319.7 GB (319728959488 Bytes) (exactly 624470624 512-Byte-Blocks)
Volume Free Space: 6.0 GB (5990821888 Bytes) (exactly 11700824 512-Byte-Blocks)
Device Block Size: 512 Bytes
Read-Only Media: No
Read-Only Volume: No
Ejectable: Yes
Whole: No
Internal: No
