Articles by Allen Sood on ArticleSnatch.com

Damaged Groups and Incorrect Permissions Cause Data Loss in Mac OS X

Wed, 04 Nov 2009 02:16:56 -0500

Mac OS X is a multi-tasking operating system that allows you to execute one or more processes at the same time. In some situations, you need to restart your Mac computer to clear several system processes to free system resources. This is the best solution to prevent system freezing. But sometimes when you restart your Mac computer, you encounter gray screen of Mac with a gray spinner. At this point, system become inaccessible and you can not get into it and use your data. This behavior of Mac OS X system results into critical data loss. In these critical situations, you need to opt for Mac Data Recovery to retrieve lost data from Mac OS X hard drive. In these serious situations, you are recommended to use the Disk Utility, Zap PRAM and several other standard solutions. But such solutions are not applicable in all these situations. They work in limited situations and could not work around startup problems. In such situations, it will be worth to carry out complete restoration of your system from the Time Machine backup.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on Mac recovery software. He is also a freelancer for http://www.mac-file-recovery.com/

All About Mac Data Loss and Mac Recovery Solutions

Mon, 02 Nov 2009 01:51:23 -0500

If you buy a Mac OS X computer, you know that its hard disk drive is susceptible to crash or failure. The drive may get damaged at any point and you come across serious data loss circumstances. The hard drive corruption due to file system damage, system failure or virus infection is quite common. To solve data loss issues, you need to approach a reliable and effective Mac Data Recovery solution. There is no method to stop the hard drive failure or crash, but you could protect your valuable data by creating the reliable and regular backup. A hard drive is the most critical component of your Mac computer that is used to store system software, application software and data files. The hard drive errors are bound to occur. And this is why the drive fails and cause data loss situations. The system failure and crash like situations generally occur due to virus infection, file system corruption, operating system malfunction, hard drive formatting and other such situations. When data loss occurs or you seem that your data is missing from your hard drive, only the file system reference of the file is deleted.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on mac recovery software. He is also a freelancer for http://www.mac-file-recovery.com/

False System Partition Issue and Partition Loss in Microsoft Windows

Mon, 26 Oct 2009 03:35:53 -0400

Microsoft Windows operating system allows you to create dynamic partitions. The dynamic partitions have a number of advantages over basic partitions. A Windows hard drive that contains dynamic partitions is known as dynamic disk. These hard drives support multi-partition volumes and locally store the partition information. LDM (Logical Disk Manager) is a Windows subsystem that is proposed for managing other subsystems. It uses information of LDM that hold the partitioning information. In case any damage to partition information, you might lose your partition and stored data. It requires Partition Recovery to be handled. The dynamic disks support different operations such as creating or removing striped, simple, mirrored, RAID-5 or spanned volumes, breaking mirrored volumes into two or removing mirrors and many alike. But in some cases, when you view the Disk Management Tool, you may see two different volumes listed as system partitions. When you try to delete the system volume, process may fail with underwritten error message: âCannot delete the system volume on this diskâ When you try to format the affected Windows partitions, after clicking Yes button, you come across below error message: âThis volume is no longer the current system volume.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on partition recovery software. He is also a freelancer for http://www.partitionrecovery-software.com/window-ntfs-fat-recovery.php

Disk Utility Internal Error and Mac Data Loss

Fri, 23 Oct 2009 03:16:38 -0400

In Mac OS X, Disk Utility is used to perform several disk related tasks. It is beneficial in creating, converting, compressing and encrypting disk images, checking the SMART status of hard drive, verifying the disk integrity, mounting or unmounting the hard drive, checking and repairing file system errors and repairing hard drive permissions. This efficient application does not work in all possible situations and may not prevent the data loss circumstances. When data loss occurs, Mac Data Recovery is required to salvaged affected storage media and retrieve lost data. In a practical scenario, when you try to repair hard drive permissions using the Disk Utility program, you might encounter the below error message: "Disk Utility Internal Error. Disk Utility has lost its connection with the Disk Management Tool and cannot continue. Please quit and relaunch Disk Utility." After this error message, the repairing process gets halted and the drive remains intact, i.e. in damaged state. At this point, you are required to find out the cause of this issue and go for Data Recovery Mac to sort out it.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on Mac recovery software. He is also a freelancer for http://www.mac-file-recovery.com/

Connecting Wrong Input Device May Cause Mac Data Loss

Tue, 20 Oct 2009 03:06:00 -0400

Mac OS X is the most powerful and widely used operating system, developed and marketed by Apple Inc. It is a Unix-based computer operating system that is the successor of Apple's Mac OS. This efficient computer system software have been designed on the technique developed at NeXT. There are six versions available of Mac OS X in the market and Mac OS X 10.6 Snow Leopard is latest one among them. It is considered as the most reliable operating system, but in some cases it may also fail and cause serious data loss situations. In these cases, you are Mac Data Recovery to get your mission critical data back. In many scenarios, hardware issues with your Mac computer could result into critical data loss situations. If you mistakenly connect or attach an incorrect input device to Mac OS X system might ruin your significant data and may cause data inaccessibility. In a practical scenario, when you connect a mouse from a Mac system that is experiencing data loss problems to a healthy system, you might find that the data from healthy system has got lost or disappeared.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on Mac recovery software. He is also a freelancer for http://www.mac-file-recovery.com/

Mac Os X Displays 'Open Firmware' Phrases at Startup

Fri, 16 Oct 2009 03:05:00 -0400

Some Macintosh computers do not support using first hard drive partition being of larger than 8 GB in size. So, when you upgrade your computer to use a hard disk using a large size startup partition, odds are that computer might fail to boot and work properly. To solve these problems, it required you to repartition the drive, which causes all the existing files and folders to delete. Thus, you are suggested to use a suitable Mac Recovery tool if in case no valid data backup is available. You might experience one or more of following symptoms with your Mac OS X based computer system: You try to boot the computer but it shows a gray screen without displaying the desktop You receive errors such as, 'segment loaded error' or 'unimplemented trap' You start the computer, but it displays a white screen consisted of 'Open Firmware' phrases You try to install Mac OS X, but the Setup cannot select the hard disk and it appears as 'dim' Cause Certain Macintosh computers might fail to work correctly if the first partition is not completely contained within 8 GB of hard disk .** End Summary**

About the Author:
Allen a student of Mass Communication doing research on Mac recovery software. He is also a freelancer for http://www.mac-file-recovery.com/

Kernel Fails to Load Mac OS X Files

Wed, 14 Oct 2009 03:28:58 -0400

The kernel serves as the core of a computer operating system, including Mac OS X, located at a protected area of memory. It provides basic system services, such as memory management, file management, Input/Output management, process management and more. For a Mac system to boot and function properly, it is vital for kernel to be intact. A Mac OS X computer shows typical symptoms when its kernel fails to load the operating system. The solution thus employed necessitate that you maintain an updated data backup in case of any data loss. However if you find that an updated or valid data backup is unavailable, you need to use a Mac Data Recovery utility to extract lost data. To illustrate, suppose you use a Mac OS X 10.5.x Leopard-based computer. You try to boot the computer but experience the system displaying a gray screen with an Apple logo. You encounter a spinning gear, but the boot process doesn't progress further and kernel fails to successfully load the operating system.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on Mac recovery software. He is also a freelancer for http://www.mac-file-recovery.com/

VBR Corruption and Partition Recovery

Fri, 09 Oct 2009 03:24:53 -0400

In Windows, each hard disk partition has an individual VBR (Volume Boot Record). Also referred as Volume Boot Sector or Partition Boot Sector, it is consisted of two major components: Disk Parameter Block or Volume Boot Code. Where the former component contains a data table containing specific volume information, the latter part contains the code required to load Windows. MBR calls it for primary active partition. So, it remains unused for other disk partitions. For a non-partitioned device, VBR serves as the boot sector, similar to MBR for a partitioned device. A Windows computer might render unbootable if VBR gets corrupted, which calls for a Partition Recovery solution. However, you should first try to solve the issue by using Windows boot disk or restore from backup. For instance, when you try to boot your Windows-based computer, you might find it unable to boot with some errors suggesting that the media is invalid or you need to format it. Cause VBR or MBR is corrupted, probably due to virus infection or unexpected shutdown. Since VBR is operating system code that loads it, its corruption can lead system to halt.** End Summary**

Troubleshooting Post Safari 4 Installation Issues

Wed, 07 Oct 2009 03:06:14 -0400

Safari, the Apple Web Browser, is a feature-rich product with all modern functionalities. Safari 4 is a new release giving improved look and fast usage, better than its predecessors. But in some cases, installing the release proves susceptible to host system. After installing Safari 4, the Mac OS X user might faces issues, like boot problems, startup crashes, missing options and several other odd behaviors. While boot issues, it is suggested to boot the computer using installation disk to repair the disk and permissions. However, if you fail in your attempts, the recommended solution is to perform clean Mac OS X installation. Since it causes data to delete, you should restore it from backup or recover it using a Mac Recovery Software.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on Mac recovery software. He is also a freelancer for http://www.mac-file-recovery.com/

Mac OS X Fails to Start After System or Security Update

Mon, 05 Oct 2009 03:24:06 -0400

A Mac OS X computer system might behave abruptly after you install any major Mac OS X update. In severe situations, the computer might fail to boot. To solve these problems, you might need to reinstall the operating system which deletes and causes data inaccessibility. If a valid data backup is not available in such situations, you will need to use a Data Recovery Mac software. For instance, suppose you use a Mac OS X based computer system. You install a Mac OS X 10.4.5 or a security update. After this, when you try to boot the computer, you observe a blank grey or blue screen with no access to stored data. Alternatively, you might experience that the system pauses indefinitely at the Apple logo. Solution You should try solving system startup issues post installing Mac OS X updates by these methods: Boot errors can occur due to corruption of cache and .plist files. Try deleting the files by starting the computer in Safe mode by holding 'Shift' key while startup If the login or startup items are faulty, this might create issues while boot.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on mac recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/detail-features.php

Data Deleted after Guest Account Log-in in Snow Leopard

Thu, 01 Oct 2009 03:31:15 -0400

Snow Leopard guest account allows other users to log in to your account without actually letting them to access or edit your data. When the guest user logs out, any system changes and settings it performed are cleared out and thus leaves your system safe and sound. Snow Leopard users have discovered a peculiar bug due to which their home directories get deleted after they log in the guest account. To solve problems, one of the practical solutions is to restore lost files and folders from backup However, when backup proves to be unproductive as it is damaged or not completely updated, you should use a third-party File Recovery Mac product. To exemplify, consider the following scenario: You use a Snow Leopard based system with a regular account 'A' and a guest account 'B' You select guest account 'B' at log-in screen and log out without any issue You log-in your regular account 'A' and observe that data of your directories is deleted, though the home directory exists.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on mac recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/

Unable to Move File when Creating Partiton Using Boot Camp

Fri, 25 Sep 2009 03:48:08 -0400

You might experience several issues while using Boot Camp, which might compel you to reformat the entire hard disk. In such cases, you require a complete data backup or a powerful Mac Data Recovery tool to recover seemingly lost data. For example, consider that you try to use Boot Camp to install Windows on your Intel-based Mac computer. You come across the below error message, which prompts that it is unable to move some files: The disc can not be partitioned because some archives can not be moved. Make a secure copy of the disc, and use Disc Utility to format it as a unit in formatted Mac OS - enlarged (journaled). Reform your informations on the disc, and try to use Boot Camp Assistant againÃ¢â¬Â You cannot create the partition for installing Windows and hence cannot install it. Cause Boot Camp might fail to create partition for Windows because of any of the below causes: You click to partition and then undo the operation.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on mac recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/detail-features.php

Leopard is Slow or Stops at Startup

Fri, 18 Sep 2009 03:20:38 -0400

Mac OS X 10.5 'Leopard' is the sixth release of Mac OS X line of operating systems. Available in two variants for desktop and server computers, the operating system provides several revised data security and protection features. On occasion, you might find your Leopard system being slow and behaving sluggish. This could occur due to disk errors. To solve such problems, Mac OS X includes Disk Utility program to diagnose and repair the disk. But if it fails to fix corruption issues, you will need to reformat the disk and restore from backup. At times, backup fails to provide required information when you try to restore from it. In such situations, you need to use an efficient Data Recovery Mac software to extract lost files and folders. Consider that you use a Leopard based computer. You might observe any of the following symptoms with your computer: You start the computer, but it freezes up or takes considerable amount of time to start You try to boot the computer and it displays a flashing question mark. The boot process fails after this event Cause Leopard startup disk is affected from disk errors.** End Summary**

About the Author:
allen a student of Mass Communication doing research on mac recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/detail-features.php

Mac OS X Boot Failure After Installing Extension

Wed, 16 Sep 2009 03:58:11 -0400

System extensions are small programs that can be installed on an Apple Macintosh computer in order to extend system's functionality. But if the installation is incomplete, you might run into several system issues. Your Mac OS X system might become unbootable if you install a system extension, but it doesn't complete successfully. To solve such problems, you might need to perform a fresh reinstall of your system and thus, require complete data backup availability. But if no clean backup is available, you will need to use a powerful Mac File Recovery software to restore the missing files and folders. For an instance, consider that you use a Mac OS X 10.4.7 based computer system. You might come across the below scenario with your computer: You configure and install Callisto Build 008 system extension on your computer To properly install the extension, you are prompted to restart the system You restart the computer, but it doesn't boot and you cannot access the stored data Cause Such errors might occur due to incomplete or corrupted installation of system extension. This could happen because of interrupted installation.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on mac recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/detail-features.php

Boot Camp Assistant Fails to Create Partition

Mon, 14 Sep 2009 03:06:25 -0400

Boot Camp is a Mac utility that allows you to install Windows on your Intel-based Macintosh computer by using the Windows installation disc. The Boot Camp Assistant is the tool that creates a partition so that Windows can be installed. Before doing so, the application checks the target disk for integrity. If the disk is suffering from corruption errors and needs repair, you need to fix it using Mac utilities before creating the partition. But if the process fails, you will need to reformat the disk, which causes data loss. To cope up with such problems, use your recent data backup available or scan your disk by using an efficient Mac Recovery utility that could recover the lost data. To illustrate this, consider that use an Intel-based Mac computer. You try to install Windows on your computer and use Boot Camp Assistant to create the partition. But the process fails and you receive the below error message: Your startup disk cannot be partitioned because verification failed. Start up your Macintosh from a Mac OS X Install Disc and use Disk Utility to repair your startup disk...Ã¢â¬Â You cannot create the partition even at subsequent attempts of doing so.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on mac recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/detail-features.php

Error Converting a FAT Partition

Tue, 08 Sep 2009 03:53:49 -0400

Windows support converting a FAT formatted partition to NTFS formatted partition using a command-line tool-Convert.exe. The file system conversion is not a two-way process, i.e. you cannot convert back a NTFS partition to FAT partition until you format it. However, you might also experience some issues while using the tool, which compel you to reformat the volume. In such cases, it is vital that you have a valid data backup to restore the data or else you will need to use a powerful Windows Partition Recovery software. To illustrate this issue, consider that you use a disk that is formatted to FAT16 or FAT32 file system. You use Convert.exe to convert its file system to NTFS. But you fail to perform this task and come across an error message: The type of the file system is FAT32. Determining disk space required for file system conversion... Insufficient disk space for conversion The conversion failed. Drive: was not converted to ntfsÃ¢â¬Â You encounter this error even if the disk is not deficient of free space. Cause The above error occurs because the target partition contains some bad sectors at its end. Convert.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on windows partition recovery software. He is also a freelancer for http://www.partitionrecovery-software.com/window-ntfs-fat-recovery.php

System Partition Creation Fails in Windows

Sat, 05 Sep 2009 03:14:04 -0400

EFI system partition is the disk partition used by computer system to adhere particularly to EFI scheme. This partition is refereed by ID 0xEF in MBR partition table scheme. Microsoft recommends that when you partition a hard disk, you should set EFI system partition as the first partition of the disk. But at times, specifically when you try to install Windows, you might experience that Text-mode fails to work, as expected. This behavior is particularly observed if partition other than EFI partition is the first hard disk partition. In such cases, you need to delete this first and any existing ESI partition from the hard disk, which causes data loss. If you don't have backup that could restore the data after deleting the partition, you should use powerful Partition Recovery Software to extract the lost data. For an instance, consider that you try to install Itanium-based version of Windows XP or Windows Server 2003. You experience that text-mode part of the Setup fails to work and return an error message. Cause You might observe the above discussed symptoms while installing Windows if the Setup tries to create an EFI system partition or you manually try to do so.** End Summary**

How to Troubleshoot Linux Error ' cannot execute "/etc/init.d/boot'?

Thu, 03 Sep 2009 03:41:48 -0400

Linux boot process is inclusive of several steps. The last steps of this boot procedure in init process, identified by id '1'. When starting the system, init starts system processes, which have been defined in /etc/initab file. Init starts several instances of getty that wait for console logins. However, if the process experiences any fault or interruption, it fails and the boot process doesn't proceed further. Also, you cannot access the data that is stored on your hard disk. You might need to reinstall the system to solve such problems. At times, when no good data backup is available, you will need to use Linux Data Recovery application. For an instance, consider that you try to start a Linux-based system. The boot process might fail with the below error message: cannot execute "/etc/init.d/boot cannot execute "/etc/init.d/rcÃ¢â¬Â You might also encounter a login screen, after which the system might hang up. Cause The above error might occur due to file system errors. If one or more of the Linux file system data structures are corrupt, the boot process hangs at the last step of init process.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on linux recovery software. He is also a freelancer for http://www.stellarinfo.com

Data Loss in External Mac Hard Drive When you Change Partition Scheme

Thu, 27 Aug 2009 03:40:54 -0400

In Mac OS X, Time Machine is a powerful and advanced backup tool, that was first introduced in Mac OS X 10.5 Leopard. It is designed to work with Time Capsule. It create incremental and secure backup of all sorts of files, which can be restored when required. Time Machine allows you to restore entire system, several files or even a single file. The backup can be created on external as well as internal hard drive and thus helps you to avoid the requirements of Mac File Recovery in case of system failure and data loss. In order to create backup of your critical data on external storage media like hard drive, this is required that the drive must be formatted with the HFS+ file system, which has journaling enabled. However, when the hard drive uses Master Boot Record (MBR) partition types, problems might occur. Exchange hard drives, which use the MBR partition type, do not support the storage more than 10 Gigabyte (GB) with Time Machine backup tool. Thus, if this backup tool is being used to create backup of data on such external hard drives, backup process might stop after 10 GB.** End Summary**

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

Mac File Recovery After Root Account Deletion

Tue, 25 Aug 2009 03:08:48 -0400

Mac OS X (also known as Macintosh) is a multi-user OS. It allows you to create several accounts on a single computer and use them as per your requirements. But you must create certain accounts in Mac OS X, even if you do not use them. Among all user account, root account is the most important one. It controls the functioning of your Mac computer and manages all of the accounts. In case if the root account gets deleted, your system would not longer boot up appropriately. This behavior of Mac OS X cause critical data loss situations and require Mac File Recovery to be fixed. You are recommended to not to enable the System Administrator or Root account on your Mac OS X system. This is a super userÃ¢â¬Â account, which has access to all of the files and folders on Mac OS X hard drive. By default, the root account is disabled by Apple. Certain processes can not be run without the root account on your system. Since this is needed to be present there (even if the account has no password, and thus it is disabled), you should leave it on your computer and disable it.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on mac file recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/detail-features.php

Low Disk Space May Cause Data Loss in Mac OS X

Thu, 20 Aug 2009 05:12:58 -0400

There are some situations, where you might find that your Mac OS X system is working very slow. The problem could occur either due to low capacity RAM or low disk space. Low disk space is a very critical problem, that might not allow you to store more data on hard drive and in some cases the drive may get crashed. These situations might cause data loss and require Mac Data Recovery to be sorted out. Recovery is possible only through advanced and effective recovery solutions. In a practical scenario, sometimes while working on your Mac computer or while storing data to hard drive, you might come across the below given error message: "Low disk space. You need to free up space by disk cleanup or deleting programsÃ¢â¬Â After occurrence of this error message, you can not save data on your hard drive unless you delete some existing files from it. Deleting the files would eventually cause data loss and require Mac Recovery to be resolved. This is extremely dangerous to allow the hard drive to get too occupied. You might risk a hard drive crash and loss of all the data, which is stored on the drive.** End Summary**

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

Mac Data Loss in TDM and Mac Data Recovery

Tue, 18 Aug 2009 05:36:27 -0400

TDM or Target Disk Mode is a boot mode in Mac OS X computer that enables the system to work as an attached FireWire data storage media. In this boot mode, Mac OS X does not load operating system and FireWire hard drive is accessible through the host system for copying files from and to the corresponding Mac OS X volume. But if you try to mount the hard drive volume of an Intel-based Mac OS in this mode, the process might fail and the volume become inaccessible. The hard drive volumes could not be read and thus stored data. It results into data loss and require Mac Data Recovery to be sorted out. In a practical scenario, when you attempt to mount hard drive volume on your Intel-based Mac computer in Target Disk Mode, the operation could not complete successfully and you come across the below give error message: You have inserted a disk containing no volumes that Mac OS X can readÃ¢â¬Â When above error occurs on your Intel based Mac OS X computer, the hard drive mounting process gets halted and you come across volume inaccessibility issues.** End Summary**

About the Author:
allen a student of Mass Communication doing research on mac data recovery software. He is also a freelancer for http://www.macintosh-data-recovery.com/products-catalog.php

Ntfs.sys File Structures Corruption Cause Partition Loss in Windows

Fri, 14 Aug 2009 06:42:34 -0400

NTFS or New Technology File System is an advanced file system for Microsoft Windows operating system. NTFS is more reliable than the FAT file system as it supports journalizing, which prevents file system corruption and data loss situations in case of improper system shutdown. But in some cases, when you try to access any file from NTFS partition, the process may not complete and you come across a warning message that suggests you to run CHKDSK.EXE to detect and repair partition corruption. But the CHKDSK.EXE may not handle the situation correctly and you come across partition loss. In these circumstances, it becomes essential to carry out Partition Recovery to recover lost, missing and inaccessible Windows partitions. In a practical scenario, you might come across any of the below given symptoms while working on Microsoft Windows computer: While access files from an NTFS file system partition, you receive an error message saying that the files on your drive are corruption and you should run CHKDSK.EXE for fixing this problem. After applying CHKDSK.EXE on affected partition, the process remains intact.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on partition recovery and partition recovery software software. He is also a freelancer for http://www.stellarinfo.com

Mac Data Loss Due to Missing HFS File System File ID

Tue, 11 Aug 2009 05:29:40 -0400

HFS Plus (HFS+) is the most widely used, reliable and advanced file system, introduced by Apple Inc. for Mac OS X operating system. The HFS+ file system is made up of several objects or data structure and Catalog File is one of them. The catalog file is used by HFS+ file system to maintain critical information about hierarchy of the folders and files on a hard drive volume. Every file and folder in catalog file is assigned a distinct CNID (Catalog Node ID). In case of damage to this id, entire hard drive might get damaged and you may come across critical data loss situations. At this point, you need to opt for Mac Data Recovery solutions to get your mission critical data back. In HFS Plus file system, the catalog file is maintained as the B-tree file, and thus consists of the header node, leaf nodes, index nodes and map nodes (if required). The location of first extend of catalog file ( and thus the header node of the file) is stored in volume header. From header node of the catalog file, an implementation could obtain node number of root node of B-tree.** End Summary**

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

Inaccessible Linux Partitions After Using mksf.ext3

Fri, 07 Aug 2009 02:59:32 -0400

mksf.ext3 is a Linux command that allows you to create a Linux file system (ext3), generally in a hard disk partition. When executing the command, you need to specify the device name the file system should reside on. The command creates the file system with ext3 journal. If you execute this command on a system attached with multiple hard drives (for example, in RAID), it is recommended to specify the device name carefully. Failing to do so might result into data loss instances, such as inaccessible partitions. However, to cope up with such situations, you generally require restoring lost data from backup or using Linux Data Recovery applications that could effectively scan your drive and restore lost data at a safe location. As an instance, you use a RAID 1 system with multiple drives (for say, /dev/sdb1 and /dev/sdc1) . Then, you use MDADM to create RAID 1 device (for say, /dev/md0 )and apply mkfs.ext3 command on individual drives. After this, when you try to mount the system, the partitions appears to be inaccessible and you cannot access the data furthermore.** End Summary**

About the Author:
Allen a student of Mass Communication doing research on linux recovery and linux data recovery software. He is also a freelancer for http://www.stellarinfo.com