Mac Data Loss in TDM and Mac Data Recovery
TDM or Target Disk Mode is a boot mode in Mac OS X computer that enables the system to work as an attached FireWire data storage media. In this boot mode, Mac OS X does not load operating system and FireWire hard drive is accessible through the host system for copying files from and to the corresponding Mac OS X volume.
But if you try to mount the hard drive volume of an Intel-based Mac OS in this mode, the process might fail and the volume become inaccessible. The hard drive volumes could not be read and thus stored data. It results into data loss and require Mac Data Recovery to be sorted out.
In a practical scenario, when you attempt to mount hard drive volume on your Intel-based Mac computer in Target Disk Mode, the operation could not complete successfully and you come across the below give error message:
'You have inserted a disk containing no volumes that Mac OS X can read'
When above error occurs on your Intel based Mac OS X computer, the hard drive mounting process gets halted and you come across volume inaccessibility issues. However, in few versions of Mac OS X, when you connect an Intel based Mac OS X and start it in TDM, the hard drive volumes might appear as expected. The error dialog box consists of three options: Initialize, Ignore and Eject. You should click either Eject or Ignore.
In case, you need to format the Mac OS X hard drive volume and use it as startup volume, while in TDM, this is required that you have to use Intel-based Mac as host system. You can use Disk Utility in this arrangement to format and repartition the hard drive. If you are using PowerPC-based Mac, the Disk Utility would formate Intel-based Mac in the TDM, but it would not start.
Formatting might resolve most of the hard drive related problems, but it also has a downside. It removers all of the data from hard drive and results into critical data loss situations, which require