The escalating data loss risks can be attributed to recurring corruption on Mac OS X hard drives. This corruption may occur on your startup disk or in the system, application, or user-specific cache files. These problems are caused by regular system or application crashes, hard restarts, bad disk sectors, or failing hard drives. The Mac OS X Disk Utility is capable of resolving directory corruption, but it cannot repair corrupt or damaged files. In order to easily work around such issues and recover your precious data, you should perform Mac file recovery using advanced third-party software.
Let us consider a real world scenario. Suppose you use Mac OS X 10.6 system with JMicron SATA, ALC8xxHDA, and Multibeast installed. You frequently run into a problem that forces you to shut down the system. When you try to restart, a range of b-tree related errors show up on your screen. When you boot in Verbose mode, you notice that fsck is running on every startup and the 'systemShutdown' state is false. The following messages are displayed at the time of shutdown:
“20/01/11 8:11:42 AM com.apple.launchd[1] *** launchd[1] has started up. ***
20/01/11 8:11:42 AM com.apple.launchd[1] *** Verbose boot, will log to /dev/console. ***
20/01/11 8:11:47 AM kernel systemShutdown false”
The above behavior is encountered as the disk is not shutting down properly. In such circumstances, you should check your hard drive for errors.
Mac OS X provides two utilities to fix startup issues, i.e. Disk Utility and 'fsck' (command-line tool).
Follow the given procedure to run Disk Utility for fixing all file system issues:
If you still encounter problems, use 'fsck' in single-user mode as follows:
If you still see errors on rebooting, you should use third-party Mac data recovery software like Stellar Phoenix Mac Data Recovery. The tool is proficient in recovering all lost, deleted, or formatted data from Mac based hard drives and other removable media. It facilitate recovery from HFS, HFS+ and FAT partitions. Additionally, the software is compatible with the latest Mac OS X 10.7 Lion.
Let us consider a real world scenario. Suppose you use Mac OS X 10.6 system with JMicron SATA, ALC8xxHDA, and Multibeast installed. You frequently run into a problem that forces you to shut down the system. When you try to restart, a range of b-tree related errors show up on your screen. When you boot in Verbose mode, you notice that fsck is running on every startup and the 'systemShutdown' state is false. The following messages are displayed at the time of shutdown:
“20/01/11 8:11:42 AM com.apple.launchd[1] *** launchd[1] has started up. ***
20/01/11 8:11:42 AM com.apple.launchd[1] *** Verbose boot, will log to /dev/console. ***
20/01/11 8:11:47 AM kernel systemShutdown false”
The above behavior is encountered as the disk is not shutting down properly. In such circumstances, you should check your hard drive for errors.
Mac OS X provides two utilities to fix startup issues, i.e. Disk Utility and 'fsck' (command-line tool).
Follow the given procedure to run Disk Utility for fixing all file system issues:
- Boot the system using Mac OS X Installation disc.
- Go to 'Installer' menu and select Disk Utility.
- Select the First Aid tab and then choose your Mac OS X volume to be repaired.
- Click 'Repair' to initiate the repair process.
If you still encounter problems, use 'fsck' in single-user mode as follows:
- Boot the computer in single-user mode and type the following at the command-line prompt:
'/sbin/fsck -fy'
- If some errors were found and repaired by fsck, it will show you a message:
'FILE SYSTEM WAS MODIFIED'
- Now run the 'Reboot' command at the prompt.
If you still see errors on rebooting, you should use third-party Mac data recovery software like Stellar Phoenix Mac Data Recovery. The tool is proficient in recovering all lost, deleted, or formatted data from Mac based hard drives and other removable media. It facilitate recovery from HFS, HFS+ and FAT partitions. Additionally, the software is compatible with the latest Mac OS X 10.7 Lion.
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