Remove Recovery HD Partition
Open terminal and run this command
$ diskutil eraseVolume HFS+ Blank /dev/disk1s3
... you will see ...
Started erase on disk1s3 Recovery HD Unmounting disk Erasing Initialized /dev/rdisk1s3 as a 620 MB case-insensitive HFS Plus volume Mounting disk Finished erase on disk1s3 Blank
Now open Disk Utility, there a new Blank partition.
Merge the partition, run following command in terminal:
$ diskutil mergePartitions HFS+ SAMSUNG disk1s2 disk1s3
You will see like this:
The chosen disk supports resize; disregarding your new file system type and volume name
Merging partitions into a new partition
Start partition: disk1s2 SAMSUNG
Finish partition: disk1s3 Recovery HD
Started partitioning on disk1
Merging partitions
Waiting for the disks to reappear
Growing disk
Finished partitioning on disk1
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.0 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_HFS SAMSUNG 499.7 GB disk1s2
Rebuild Recovery HD Partition
Download Lion Recovery Update v1.0
Run in Terminal
$ hdiutil attach ~/Downloads/RecoveryHDUpdate.dmg $ pkgutil --expand /Volumes/Mac\ OS\ X\ Lion\ Recovery\ HD\ Update/RecoveryHDUpdate.pkg ~/Desktop/RHD $ hdiutil attach ~/Desktop/RHD/RecoveryHDUpdate.pkg/RecoveryHDMeta.dmg $ ~/Desktop/RHD/RecoveryHDUpdate.pkg/Scripts/Tools/dmtest ensureRecoveryPartition / /Volumes/Recovery\ HD\ Update/BaseSystem.dmg 0 0 /Volumes/Recovery\ HD\ Update/BaseSystem.chunklist
After that you will see:
Creating recovery partition: finished
Now we have rebuild Recovery HD Partition successfully.
/dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *120.0 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS Macintosh HD 119.2 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.1 GB disk1 1: EFI EFI 209.7 MB disk1s1 2: Apple_HFS SAMSUNG 499.8 GB disk1s2