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HFS+ formatted storage devices (except floppy disks) are divided into one or more volumes, which are further divided into sectors. These sectors are known as logical blocks in HFS volumes. To reference and keep record of each file, file thread, directory and directory thread on volume, Mac systems use a Catalog file. This file is actually a B*-tree and thus to derive directory contents, system needs to traverse B-tree. So, if this directory tree suffers corruption due to any cause, you may need to reformat the volume and restore lost data from backup. If data backup is unavailable or damaged, you should opt for Mac Recovery applications.

You might encounter the following error with your Mac system while performing normal operations:

“-127 fsDSIntErr”

Cause

It is an Input/Output error and usually signifies that file system has been affected by some internal inconsistencies. This may occur because of directory tree damage.

Solution

To resolve the above issue, you need to follow the following steps:

For correcting minor directory damages, you can use Disk First Aid. It is the part of Disk Utility that can check and repair imperfections with HFS and HFS+ formatted volumes. This tool can repair structures like Extent B-tree, Catalog B-tree, Catalog File, Volume info etc.

Try rebuilding the Desktop environment. To carry out desktop rebuilding, press and hold Option and Command keys while starting the Mac system.

Run fsck in single user mode.

If the problem persists, perform clean reinstallation of Mac OS. It erases all data from the Mac volume, so you should go for a complete data backup before formatting the volume. To avoid any issues while restoration, you should check the health of data backup. So, it is recommended to always check backup log reports and verify if it contains all required files. However, if you encounter any issues with data backup, you should use third party mac data recovery applications to fix the data loss situations.

Mac Recovery software are designed to use explicit scanning algorithms on affected drives. They can locate the lost data files by performing in-depth scan powered by advanced scanning methods and file signature information to achieve potential data recovery. You can easily use these applications with their user-friendly screens and simple operation.

Stellar Phoenix Macintosh Data Recovery is an advanced and robust mac recovery tool. It comes with boot DVD to solve data loss for unbootable Macs. It supports HFS+, HFSX, HFS Wrapper, HFS and FAT file systems. This Data Recovery Mac is compatible with Mac OS X 10.5.x Leopard, 10.4.x Tiger and 10.3.9 Panther.

Simpson a student of Mass Communication doing research on hard drive recovery software. He is also a freelancer for mac recovery .

Article Source: Error -127 with Mac File Systems

HFS Plus and HFS Extended file systems support the journaling feature. File system journaling enabled Mac systems gain ability to recover after instances like hardware component failure or unexpected shutdown. It reduces file system repair and hence Mac Data Recovery issues. When applied for servers, it proves helpful to increase their uptime.

To maintain file system integrity after a crash, a journal file is maintained. This is a log file that keeps records of all file changes, done on the disk. If system fails because of power failure, journal can help recovering file system (HFS+ or HFSX). When the Mac system is restarted, the file system replays this log information and comes to a well-defined state. Thus with the use of journal, hard disk get restored to its known-good state, though buffered data gets lost.

But sometimes, journal can itself become corrupt due to issues like unexpected shutdown or hardware problems. In such cases, when Mac system replays journal log entries, it marks invalid entries in the file system and all metadata structure becomes invalid. Thus, file system gets damaged and data becomes inaccessible. In some cases, system may fail to boot.

To recover file system and hence data, the following steps can be taken:

• You can use fsck command to repair corruption issues with HFS+ or HFSX file system. This command tool can repair most of the file system issues.

• If problem continues to occur, format the disk using Disk Utility and use your recent data backup to restore data from. Formatting the disk recreates the file system and refreshes all metadata information.

• If data backup is unavailable, incomplete or damaged, you can use third party Data Recovery Mac applications to recover data.

Mac Data Recovery Software

Mac Recovery software are designed to use advanced scanning algorithms that can scan damaged Mac drive and recover data. The use of such tools is valid in all logical data loss scenarios like formatted disks, file system corruption, accidental file deletion etc. Such software can work irrespective of missing drive metadata information and keep data integrity intact. You can easily use these software because of their user-friendly nature.

Stellar Phoenix Macintosh Data Recovery is the finest Mac Recovery tool and comes with boot DVD for unbootable Macs. It supports HFS, HFS Plus, HFSX, HFS Wrapper and FAT file system based disks. It is compatible with Mac OS X 10.5.x (Leopard), Mac OS X 10.4.x (Tiger) and Mac OS X 10.3.9 (Panther).

Jonny a student of Mass Communication doing research on mac recovery and data recovery mac software. He is also a freelancer for http://www.stellarinfo.com

Article Source: Journal Corruption Can Corrupt Mac File Systems

Screen of deaths are the indicatives of the fatal errors with the computer systems. On Mac systems, appearance of screens of death along with the deadly error messages is something like taking your life. You may have lots of critical information over there which get risked with Gray Screen of Deaths (GSOD) in Mac.

Particularly, GSOD, which is also known as Gray Curtains of Death, refers to the occurrence of kernel panic in Mac system. When Linux finds it hard to recover from the unexpected condition, Kernel panic is the common symptom. At this stage, the system becomes unresponsive and either waits for the manual reboot or gets rebooted automatically.

GSOD id actually a nickname of the kernel panics in Mac. The reason could be the invalid memory address, buggy hardware or the operating system faults. With the text dump on the man screen, they may explain you the actual cause or in the Later Mac versions, you may see this text behind the reboot message.

The user faces many problems while using the system in which the system just locks and give no response to the commands. Spinning wheel may also be seen.

As the cure, try booting the system through the installation CD. If you get the system working, the problem is lying with the system software which demands reinstallation. But be cautious to backup all the data of the primary volume as this will get erased with the formatting. Data which has got lost need Mac recovery software way to get back into action.

However, you get the same gray screen of death or find the hard drive unbootable, even while attempting booting with installation CD, the problem is hard drive damage itself which needs Mac data recovery service to extract trapped data. So recover the lost data and replace the damaged hard drive.

Data recovery Mac is vital as data is important and so its loss can’t be accepted in any case. The quality of Mac recovery solutions matters as with them, you dealing with the most important assets of your business. So choose Mac data recovery software or service which is suitable and appears worth.

Stellar Information Systems Limited, the pioneers of data recovery industry, offers you the most productive data recovery Mac solutions. Stellar Phoenix Macintosh Data Recovery software has been designed with the advanced technology to safely and completely recover lost data for HFS, HFS+, HFSX and HFS Wrapper file systems. This Mac recovery utility recovers all files, which have got lost in any case.

Also, you will find Stellar’s Mac data recovery service worth with Class 100 Clean Room availability and the expert of the technicians. Stellar has all the Mac recovery tools and techniques which help recovering the utmost data.

Shally Spears is a freelancer for Stellar which offers mac data recovery software and file recovery programs for different OS and file system including data recovery mac, data recovery linux, photo recovery , pst recovery and many other programs.

Article Source: Mac: Gray Screen of Death

The EFI or Extensible Firmware Interface is the specification, defining the software interface between Mac operating system and platform firmware. EFI boot process involves a boot manager which is built into the firmware. But with few of the Mac systems, the boot drive options are found to be changed to include EFI boot.

When the user desires to choose from the available boot volumes, the boot menu starts displaying the options which have never been expected. The EFI boot option

starts displaying and you have no clue of the bootable volume which has lots of important data within. Also the booting process may not be as usual, but the drive name appears as normal in Finder.

The condition is threatening as the data stored can’t be lost in this way. The possible culprit behind the scene could be the some modifications, done to volume structure of the drive. This is also feasible that the user has restored a clone of the hard drive after upgrading or any other case.

In such conditions, the user is recommended to stop doing anything with the system and follow the given steps:

· If you are cloning the hard drive, try using some alternative method. It should be a bit-for-bit transfer as small differences could create problems. You can try cloning a temporary external disk and then replacing the internal one and then cloning back.

· Try using the disk repair utility

· Reset PRAM as this might contain some boot information

· Attempt changing the startup disk in System Preference as this could be the result of some firmware settings

· Erase all the partitions of the drive as the last resort by using the Disk Utility

Erasing or formatting the hard drive partitions mean that all your data has gone and this is the time to have Mac recovery. Data worth when this is significant from business point of view. So Mac data recovery needs productive source to happen.

Data recovery industry has benefited the users with data recovery Mac software which have the high scanning ability for the lost data. These Mac recovery utilities are easy to use and well in results.

Stellar Phoenix Macintosh Data Recovery software is the advanced Mac data recovery help, offered to scan the affected drive. This data recovery Mac application is found to be compatible with HFS, HFS+, HFSX and HFS Wrapper file systems. Through its read-only conduct, the software is viable to get safe Mac recovery.

Williamz Jack work as a freelancer and researcher of Data Recovery & File Recovery Software.

Article Source: Boot Options Change To ‘EFI Boot’ in Mac