Dividing a Mac hard drive into two or more volumes is called as partitioning the Mac hard drive. Partitions are called as volumes in Mac Operating System. When you launch your Mac Operating System, each volumes mounts separately just as if you have two separate hard drives. Mostly, all Mac hard drives come with only one volume. Hence, if you need two or more volumes then you need to create them yourself. The main advantage of partitioning a Mac hard drive is, you can make both volumes as startup volumes thereby you can start your Mac Operating System in two different ways from the same Mac hard drive. For instance, if you are facing problem with one volume then you can restart your Mac by using another volume to fix the problem. You can also install different versions of Mac Operating System on different partitions like Panther on one partition and Tiger on another partition. GUID partition table (GPT), Apple Partition Map (APM) and Master Boot Record (MBR) are the different partition schemes supported by Mac OS X. Sometimes, you may accidentally delete volumes resulting in loss of data. In order to undelete Mac volume, you need to use proficient Mac data recovery tool.
Accidentally deleting volumes deletes all the contents stored on that volume. If you have important data over that partition then you may lose that data. Mac OS supports different file system like HFS, HFS+ and HFSX. In order to organize data in better way, file system is needed. HFS+ supports all the advanced features needed by Mac OS X like rich metadata, access control lists (ACL’s), POSIX permissions, Unicode filename, UNIX style links etc. HFSX is an extended case sensitive file system that adds case sensitivity to the file system i.e. it cannot differentiate between same filenames. In other words, it won’t identify “File” and “file” as a different filenames. Sometimes, you may encounter error messages while accessing the data. The error messages generally occur, when file system get corrupted resulting in loss of data. The main reasons for file system corruption are improper system shutdown, power failures etc. Sometimes, volumes refuse to mount due to logical corruption to their header resulting in loss of data.
The best way to avoid all these problems is taking backup so that you can restore lost data. While deleting volume make sure that it does not contain any important data to avoid data loss. If you have lost the data then do not save or copy new data to avoid permanent loss.
Remo Recover (Mac) Pro Edition recovers lost data from accidentally deleted volumes. This software is able to recover data from volumes, which refuses to mount or fails to mount. This software can recognize different types of files based n their unique signature. This software has two definitive volume scanning engines to recover lost data from accidentally formatted volumes. This software supports Fat16, FAT32, HFS+ and HFSX formatted volumes. Download free demo version of this software to evaluate the chances of recovery.