File system is the most critical component of Mac OS X operating system. It has to be intact and in working state to keep your system up. If file system is damaged, system may not work properly. However, in some cases, the file system may become dirty. It does not let you boot your system properly and access stored data from the hard drive. At this point, you may come across an error message, similar to the following one:

“File system dirty, run fsck”

After the above error message, you cannot access your precious data stored on Mac OS X hard drive and come across severe data loss situations. In order to get your data recovered in such cases, data recovery Mac has to be performed.

Root of the problem:

You may encounter this behavior of Mac OS X operating system due to corrupt or damaged file system. The corruption may occur due to a plenty of reasons, such as virus infection, hard reboot, improper system shutdown, running fsck on a mounted Mac OS X hard drive volume, and interrupted power supply.

Resolution:

You can try fixing this issue using any of the below methods:

Boot your Mac OS X computer in Safe Mode.

If your system does not boot in Safe Mode, check and fix file system errors using Disk Utility.

If both the above methods fail to work, try running fsck manually.

If none of the above methods work, you need to use third-party Mac disk recovery software to recover lost data.

Mac drive recovery programs are incorporated with advanced scanning algorithms and interactive graphical user interface to offer absolute and easy recovery. They are capable of retrieving lost data from all types of storage media, including hard drive, USB drive, memory card, and Apple iPod.

Stellar Phoenix Macintosh Data Recovery is the most advanced and effective solution to successfully recover lost data in all scenarios. The software recovers Mac data from all HFS, HFS+, HFSX, HFS Wrapper, and FAT file system volumes. It is compatible with Mac OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther.

When you backup volume gets locked, the Time Machine icon is replaced with simple volume icon with a small lock on it. In such cases, the volume can not be mounted and you can not access data stored on it. In case the volume is mountable and you attach it to a newly installed Mac computer, the same problem occurs with this computer as well. Your system drives get locked and it become totally unusable.

Reason of locked backup volume or Time Machine volume in Mac OS X?

This problem generally occurs after you upgrade the version of your operating system. Upgrading the operating system sometimes damages the disk permissions and leads to this behavior. Permissions may also get damaged due to virus infection and improper system shutdown.

Mac OS X operating system includes a subsystem, which is based on UNIX-style OS that employs permissions in file system. Every volume, file, and directory on your hard drive has a set of privileges, which determines who can access the data.

How to address permission problems in Mac OS X?

Mac OS X operating system facilitates you an inbuilt disk recovery Mac utility to fix permission corruption issues and disk integrity problems. You can run this utility from the installation disk of Mac OS X operating system.

In case the corruption is serious and Disk Utility is unable to fix it, your data remains inaccessible. At this point, you need to format the Mac OS X hard drive and reinstall operating system. However, it removes all the stored data from disk and put you in need of Mac data recovery solutions.

Mac Recovery software are capable of thoroughly scanning affected disk and extracting all inaccessible data from it. They are pretty safe and easy to use.

Stellar Phoenix Macintosh Data Recovery is the most comprehensive utility to effectively recover lost data from Mac OS X-supported storage media. The software works well with Mac OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther. It recovers missing data from HFS, HFS+, HFSX, HFS Wrapper, and FAT file system volumes.

Such scenarios occur when the update is affected by a bug, is incompatible with your system, or updation is not performed systematically. Since, your Mac machine becomes unbootable due to above reasons, the data saved in the hard drive also becomes inaccessible. To access data in such scenarios, you will need to restore the data from an updated backup. However, in case you have not maintained any backup, or backup is incompatible in storing required information, then you will need to opt for an effective Data Recovery Mac tool.

To elaborate the above situation, consider a practical case wherein you perform a software update on your Mac OS X 10.4.11 machine. However, when the updation is in progress, you encounter the below error message:

“Software Update has encountered an unexpected issue, you must restart.”

When you restart your system after the above error message, it does not boot and hangs at a blue screen. Furthermore, the data saved in your Mac hard drive becomes inaccessible.

Cause:

The three main reasons for the occurrence of the above error message is a bug during the updation process.

Resolution:

To overcome the blue screen and to boot your system, follow the below mentioned steps:

1. Reinstall Mac OS X 10.4.11 on your system.
2. Restore the data from a valid and complete backup.

However, if you have not created any backup and you still want to access the formatted data, then you will need to opt for a commercial Mac Disk Recovery application. A Mac File Recovery utility is an easy-to- understand and operate application that allows even a novice user to perform data recovery. The tool allows the user to preview recoverable data and restore it at your specified location.

Stellar Phoenix Macintosh Data Recovery is a powerful, yet safe Mac File Recovery utility that recovers lost, deleted, and formatted data in a few mouse clicks. Compatible with HFS, HFS+, HFSX, HFS Wrapper, and FAT file systems, the tool supports Mac OS X 10.3.9, 10.4 Tiger, 10.5 Leopard, and 10.6 Snow Leopard.

Some of the issues require hard drive formatting to be fixed and enable you to install Windows operating system. It leads to serious data loss and requires Mac Disk Recovery to be fixed, if there is no backup in place.

As an practical example of this problem, you may come across the below error message while installing Microsoft Windows 7 on your iMac using Boot Camp utility:

“Create a Partition for Windows

Each operating system requires its own partition on the disk.

Drag the divider to set the size of the partitions, or click one of the buttons.”

The above error occurs even if you have plenty of free disk space on Windows partition. You see two buttons on the error message dialog box, namely- Divide Equally or Use 32 GB. You can select any one among them to create partition.

When you click the Partition button after selecting appropriate partitioning option, you get further error message stating:

“The disk cannot be partition because some files cannot be moved.

Back up the disk and use Disk Utility to format it as a single Mac OS Extended (journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again.”

Cause

You may face this behavior due to either of the below reasons:

• Heavy file fragmentation on the hard drive and Boot Camp is not getting contiguous free space to create partition.

• The disk is damaged.

Resolution

As suggested in the above error message, you can solve this issue and perform Data Recovery Mac by formatting the hard drive. However, it removes all your mission critical data from the Mac OS X hard drive and causes severe data loss.

In such cases, Mac Data Recovery Software come for your rescue. The applications deploy powerful scanning techniques to methodically scan the Mac OS X drive and extract all lost data from it. Mac Data Recovery is pretty easy and safe with these utilities.

Stellar Phoenix Macintosh Data Recovery software recovers lost Mac data from hard drive, USB drive, FireWire drive, memory card, and iPod in all data loss situations. The software is compatible with Mac OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther. It retrieves data from HFS, HFS+, HFSX, HFS Wrapper, and FAT file system volumes.