In Apple Mac OS X, journalizing is the feature that helps to protect the file system against any unexpected power outage. The journal contains all the necessary information that Mac system requires to get back to a previous working state. When journaling is enabled on a disk, it maintains a continuous record of changes to files on the disk. If your system gets improper shutdown because of a power outage or some other reasons then the journal is used to restore the disk to a previous state when the system restarts. Some situations may result in journal corruption and making the data on the Mac hard drive inaccessible. In order to perform Mac recovery after journal corruption on Mac hard drive, you need to make use of good third party Mac data recovery application.
The read and write process can be interrupted due to a power outage or system failure, which can cause inconsistency between actual location and structure of stored files and the system directory. If journalizing is not used then the volumes are in an unknown state after a failure meaning that there is no record of their activity just earlier to the shutdown. Journalizing helps in the recovery after an unexpected system shutdown, when journalizing is turned-on on a storage volume. Journal is a file which contains a continuous record of file system operations maintained by server. After a failure, the operating system uses the journal file to return the file system to a known and consistent state.
However, in some situations, the journal file itself can be corrupted due to unexpected reasons. This may results in the corruption of file system and leading to make the data on the Mac hard drive inaccessible. The journal file can be corrupted due to various scenarios like virus attack on Mac system, improper system shutdown and system software failure etc.
The journal file is stored under the protected storage nothing but hidden directory in Mac system. If the virus attacks on the system, they are crucial and can affect the system files. The journal file can be corrupted by the virus and lead to data on the Mac hard drive become inaccessible.
By using Remo Recover (Mac) – Pro Edition software, you can completely recover the deleted or lost data, due to corruption of journal file, from Mac hard drive. You can download the free demo version of this software. This is an efficient Mac data recovery tool which supports the recovery of deleted or lost data from HFS+ and HFSX formatted Mac volumes. Not only deleted or lost data, even after the formatting or reformatting the Mac system, by using this software you can recover formatted data from Mac hard drive (SATA, SCSI or IDE). This software also capable of recovering formatted data from the various types of memory cards such as secure digital card, extreme digital card, multimedia card, memory stick and compact flash card etc. You can also make use of this software to recover deleted or lost data from iPod when it is accidentally restored.