Data Recovery from Journaled Mac File System

Published: 05th June 2009
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The journaling file system is the fault-resilient file system, which ensures data integrity since the updates to bitmaps and directories are continuously written to a sequential log on hard drive before updating the original disk log. This feature protects Mac OS X file system against hardware component failure and power outages, decreasing the requirement for file system repairs. But in some cases, journaling can not protect your data against power outages and system failures, as a result of which the file system gets damaged. In such cases, critical data loss occurs and you need to opt for Mac Data Recovery solutions to resolve it.

Journaling for Mac OS Extended (HFS+) file system improves the fault resilience and computer availability that is specifically noteworthy for the servers. This protects the file system integrity on Xserver and other systems using Mac OS X Server in case of power failure or unexpected system shutdown. Journaling also helps you to maximize the uptime of Mac servers and connected storage devices by expediting repairs of affected Mac volumes when the computer restarts.

When you enable file system journaling, a constant record of the changes to files on hard drive is preserved in journal. When your computer stops working because of power outage or any other issue, the journal is used for restoring the hard drive to a known-good state if the system restarts. You can enable or disable file system journaling by using the option "Enable Journaling" option in file menu of Disk Utility.

Although, file system journaling is an advanced feature that prevents situations like file system corruption, but it is not helpful in all cases. Under some situations, when you start your Mac, the process may fail due to corruption to the journal file or Mac file system. Journaling may not help in case of file system corruption due to virus infection.

The ultimate result would be the inaccessibility of your critical data and thus data loss. In such situations, Mac Recovery is quired to get the lost data back. This can easily be performed using Mac Data Recovery software.

These are third party applications, particularly designed to scan whole hard drive and extract all data from it. They perform easy and quick Data Recovery Mac in most of the data loss situations. With read-only and non-destructive design, these software always perform safe and original recovery.

Stellar Phoenix Macintosh Data Recovery is advanced and easy to use Mac Recovery  software to handle data loss. It supports HFS, HFS+, HFSX, HFS Wrapper and FAT file systems based Mac volumes. The software is compatible with Mac OS X 10.5 Leopard, 10.4 Tiger and 10.3.9 Panther.


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