Fix Wrong Volume Type Error in Mac OS X
In Mac operating system you are allowed to partition the Mac hard drive into various volumes. Each volume of hard drive work as a separate hard drive and you can save different types of files on it. With each mac system there is at least one system or boot volume. A file system like HFS is used to manage all such boot volume. In some of the case Mac OS becomes unable to recognize the volume and you fail to access the volume files. As a result this situation brings the severe data loss conditions. To resolve this situation Mac data recovery software is required.
Practically when you try to access Mac files from the file system you may come across the below error message:
�-123 wrgVolTypErr Not an HFS volume [wrong volume type error or (obsolete) operation not supported for MFS]�
After having the above error message HFS file system volume become completely inaccessible. In order to resolve this condition you should find out the reason of such behavior of Mac OS X. The above error usually occurs when Mac OS fails to recognize the format of HFS file system volume. It happens when the HFS file system gets corrupt. Most of the time virus infection, improper system shutdown, and other reasons become the cause of Mac volume corruption.
You can repair your hard drive using Disk utility. It detects and fixes file system errors. If the problem is major then you would have to format the hard drive. In this condition you should have valid backup of data to restore lost files. In case if you haven�t a valid backup of Mac files then you can use third party Stellar Phoenix Mac data recovery software.
It is specially designed to carry out in-depth scan of the entire hard drive. This software is capable to recover lost, missing, and inaccessible data from corrupt or inaccessible Mac volume. The software is designed for Mac OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther. It recovers data from HFS, HFS+, HFSX, HFS Wrapper, and FAT file system volumes.

