If you have a specific volume on your Mac that you would like to keep from being edited when attached, here's how to protect it.
When trying to partition and format various USB hard drives, a number of users are getting errors in Disk Utility that states "Disk Erase failed with the error: POSIX reports: The operation couldn't be completed. Cannot allocate memory".
Without an intact Recovery HD partition on your Mac, you will not be able to use Apple's FileVault disk encryption feature.
If your Recovery HD partition in OS X Lion is missing or not working, then it may be easy to get working with just a few steps.
Installing OS X Lion sets up a hidden recovery partition on most systems, but if for some reason this is missing, then there are some options for restoring or otherwise using the functions this partition offers.
Partition your hard drive so you won't need to back up media if you need to reinstall your OS later.
Apple's Disk Utility by default will only show you user-accessible drive partitions, but here is how to view all drive partitions in Apple's disk management utility.
Apple's Disk Utility has always checked the health of volume structures, but in Lion it will verify the structure of the partition tables as well.
Apple's Recovery partition for OS X Lion contains a number of utilities, but you can only open one at a time. Here is how to open multiple utilities at the same time to ease your troubleshooting and recovery routines.
Sometimes partitioning a drive so it contains multiple volumes can be useful when managing data for different tasks, but is also required for creating multiboot environments. Here is one way to do this in OS X.