Apple launched HFS or the Hierarchical File System as a fact of necessity to be worked with its newly developed 20MB hard disk for Macintosh operating systems. HFS replaced the old Macintosh File System(MFS), which was the original file system for the Macintosh operating system based computers.

Though the HFS file system has got several advance features in terms of performance, sometimes, while accessing volumes based on HFS file system, the volume can not be recognized by the operating system and hence, the data in that particular volume becomes completely inaccessible. In such a case, you need to look for any data recovery software Mac to recover back your lost or inaccessible data.

While accessing your data from a Mac OS X based volume, you may across the below error message following which the volume can not be accessed:

“-123 wrgVolTypErr Not an HFS volume [wrong volume type error or (obsolete) operation not supported for MFS]”

Form the above error message, it can be sensed that the issue is related to the file system of your Mac system. As the file system is responsible for storing and managing data in the hard drive of a computer, any damage or corruption to the structure of the file system may cause the inaccessibility of the file system based volumes.

The reason behind the corruption of the file system can be anything ranging from the unexpected system shut-down to virus attack, application malfunction or operating system crash etc.

In case of a possible file system corruption, you can use the ‘Disk Utility’ (The in-built utility in the Mac OS X) to check for the integrity of the disk and repair the damage. If ‘Disk Utility’ fails to resolve the issue, you can have another try with the ‘fsck’(A command-line utility) to check the file system at the start-up and repair the damage.
Note: If the hard drive of the troubled Mac system is totally inaccessible, then you can either attach the drive with another working Mac machine or run the utilities from the system disk.

If both of the above repairing options fail, then you have to format the drive and reconstruct the file system. Under such a case, you have to restore your data from a valid back-up as with formatting, all your data from the drive will get erased. In case, you do not have a valid backup or failed to restore from the backup, run any Mac recovery utility to recover the lost data back.

Among many available Mac recovery applications in the market, Stellar Phoenix Macintosh Data Recovery is considered to be the most efficient Mac data recovery software to recover back any of your lost, deleted, inaccessible or formatted data from the troubled Mac volume/drive irrespective of the cause. The software is pretty compatible with HFS, HFS+, HFS Wrapper, HFSX, FAT file system based volumes and with an interactive GUI, is very simple in use.

Apple launched HFS or the Hierarchical File System as a fact of necessity to be worked with its newly developed 20MB hard disk for Macintosh operating systems. HFS replaced the old Macintosh File System(MFS), which was the original file system for the Macintosh operating system based computers.

Though the HFS file system has got several advance features in terms of performance, sometimes, while accessing volumes based on HFS file system, the volume can not be recognized by the operating system and hence, the data in that particular volume becomes completely inaccessible. In such a case, you need to look for any Mac data recovery software to recover back your lost or inaccessible data.

While accessing your data from a Mac OS X based volume, you may across the below error message following which the volume can not be accessed:

“-123 wrgVolTypErr Not an HFS volume [wrong volume type error or (obsolete) operation not supported for MFS]”

Form the above error message, it can be sensed that the issue is related to the file system of your Mac system. As the file system is responsible for storing and managing data in the hard drive of a computer, any damage or corruption to the structure of the file system may cause the inaccessibility of the file system based volumes.

The reason behind the corruption of the file system can be anything ranging from the unexpected system shut-down to virus attack, application malfunction or operating system crash etc.

In case of a possible file system corruption, you can use the ‘Disk Utility’ (The in-built utility in the Mac OS X) to check for the integrity of the disk and repair the damage. If ‘Disk Utility’ fails to resolve the issue, you can have another try with the ‘fsck’(A command-line utility) to check the file system at the start-up and repair the damage.

Note: If the hard drive of the troubled Mac system is totally inaccessible, then you can either attach the drive with another working Mac machine or run the utilities from the system disk.

If both of the above repairing options fail, then you have to format the drive and reconstruct the file system. Under such a case, you have to restore your data from a valid back-up as with formatting, all your data from the drive will get erased. In case, you do not have a valid backup or failed to restore from the backup, run any Mac recovery utility to recover the lost data back.

Among many available Mac recovery applications in the market, Stellar Phoenix Macintosh Data Recovery is considered to be the most efficient Mac data recovery software to recover back any of your lost, deleted, inaccessible or formatted data from the troubled Mac volume/drive irrespective of the cause. The software is pretty compatible with HFS, HFS+, HFS Wrapper, HFSX, FAT file system based volumes and with an interactive GUI, is very simple in use.