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“the Disk is Unreadable” Error in Mac and Mac Recovery
Sometimes when you try to access external Mac hard drive (Lacie hard drive), you may get the following error message:
“The disk is unreadable: Do you want to initialize it now?”
After this error message, when you try to fix the issue using Disk Utility, you might get the following messages:
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.
As all these error messages show, there is something wrong with the data structures, library files and profiles of your hard drive. It could be either due to file system corruption or node structure corruption.
As stated in the first error message, the drive is unusable until you initialize it. The drive initialization is a three step process which wipes all the data stored on the hard drive. Its three steps are:
Disk Formatting
Disk Verification
Disk Zeroing
After initialization, you drive will be completely clean, without any data on it. It is the severest loss of your business critical data. Thus, you should never perform disk initialization in such cases.
There could be several reasons behind this problem including file system corruption, iNode corruption, invalid file system or other data structure entries and so forth. To fix all these issues, you need to simply format the drive and install fresh copy of troublesome data structures and other system files.
But, like initialization, formatting also deletes data from your hard drive and may put you in need of Mac data recovery. Mac data recovery is possible with the application of third party data recovery Mac software.
Mac data recovery software carries out the data recovery Mac operation by methodically scanning the entire hard drive and extracting all of the data from it. Mac recovery software do not change the actual data and thus perform original data recovery.
Stellar Phoenix Macintosh Data Recovery software is the most powerful and the best ever made data recovery Mac software which is capable of handling all of the Mac data loss situations. This Mac data recovery software can recover data from a variety of storage devices including Mac hard drives, Lacie drives, USB drive, FireWire, CD, DVD, Digital camera, memory cards, iPod and many alike.
This Mac recovery software comes equipped with a simple, cool looking and interactive user interface, which lets you do effective and easy data recovery Mac. It is Universal Binary Mac data recovery software which works well on both Intel and Power PC and can perform Mac data recovery for all file versions of Mac OS X including Mac OS X Panther, Tiger and Leopard.
About the Author
Derreck is a student of Mass Communication doing research on data recovery. She is also a freelancer for http://www.data-recovery-linux.com
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How To Repair An Invalid And Unreadable Dynamic Disk
Invalid Dynamic Disk: Before installing Window 7, I installed the original Windows XP professional on the machine, I found myself to be very smart doing this. Unfortunatly now that Window 7 is installed on this machine the disk is not accessible. Disk Manager says "Dynamic Disk Status Invalid". Now I know mainly because I was using a WINDOWS 7 HOME EDITION, this does not support dynamic disc, so an Invalid Dyanmic Disk was shown in disk management. In fact, all the Home edition of Windows do not support dynamic disks such as XP Home, Vista Home, Win7 Home Basic and Premium Edition. The screen shot is shown below:
Unreadable Dynamic Disk: The drive is not accessible. The drive may have experienced hardware failure, corruption, or I/O errors. The disk's copy of the system's disc configuration database may be corrupted. An error icon appears on the Unreadable disk. Both dynamic and basic disks display the Unreadable status. Disks may display the Unreadable status while they are spinning up or when Array Manager is rescanning all of the disks on the system. In some cases, an Unreadable dynamic dischas failed and is not recoverable. For dynamic disks, the Unreadable status usually results from corruption or I/O errors on part of the harddisk, rather than failure of the entire harddisk as follows.
Repair Invalid and Unreadable Dyanmic Disk:
There are two ways to solve this problems, first is to directly clear data and revert it to a basic disk, the second is to become it to a valid basic disk by using Dynamic Disk Converter, which can convert an invalid, unreadable dynamic to basic disk to fix it without losing data, even if the dynamic drive can not be accessed in Windows 7/Vista Home Basic Edition, and it's secure and easy!
The step is as follows:
1. Run the converter, and select a Invalid or Unreadable Dynamic Disc that you want to repair.
2. Confirm that the selected disk which you wish to repair.
3. Executing...Report of the repair is complete.
4. After completing, you need restart the computer to take effect, and then the disk becomes valid and readable!
Dynamic Disk Converter Download: http://www.dynamic-disk.com/download.html
About the Author
Windows disk, partition administrator
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