Mac operating system is a powerful device which is compatible to store a large number of data on various types of devices like hard disk, external hard disk, USB hard drive, DVD, memory card etc. Most of the external hard drive users use this device to take a backup of the data so that they can secure their data. These devices are also used to move data from one system to another system. Sometimes these stored data becomes inaccessible and you might have to face data loss situation and need data recovery as a solution.
Sometimes when you try to extract data from the external hard drive then you will come across the below error message:
�The disk is unreadable: Do you want to initialize it now?"
When you attempt to fix this behavior of external hard drive, using the disk utility tool then you may get the further error messages stating:
"Verify and Repair volume "disk1s3"
Checking Journaled HFS Plus volume.
Invalid node structure
Invalid B-tree node size
Invalid node structure
Invalid B-tree node size
Volume check failed.
Error: File system verifies or repair failed."
The above error messages generally caused by missing or damaged data structure, hard disk profiles, and library files of the Mac OS X. Node structure corruption or file system corruption, invalid system files can be the cause of such Mac OS behavior. As a result the stored files and folders may get damaged and corrupt also. It leads the situation of data loss.
After having the disk unreadable error in Mac you can�t use the Mac hard disk until it is initialized. But the steps which can initialize the hard drive will wipe out your stored data from hard drive. It is necessary to replace the damaged data structure and perform mac data recovery to fix the disk unreadable problem.
If you are facing problems while removing the damaged system files from the hard drive then you will have to format the hard drive but it will delete entire data from the hard drive. In order to recover data from the formatted hard drive you will have to use Mac hard drive recovery software.
Stellar Phoenix Mac hard drive recovery is specially designed to recover the lost data from the formatted hard drive. The application of this recovery tool enables you to systematically scan the entire hard drive and extract all he data from disk. It allows you to recover lost, deleted, missing, formatted, inaccessible data from the Mac supported media. This data recovery software works with Mac OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger and 10.3.9 Panther. It is capable to retrieve data from all HFS, HFS+, HFSX, HFS Wrapper and FAT system volumes.
