$Extend$Objld File Corruption and Recovery

NTFS uses as special file called $Extend$Objld to store file system metadata. It is the hidden file, located at 24 or 25 position of boot hard drive MFT (Master File Table). NTFS allocates a unique object identifier to each file on the hard drive, to which $Extend$Objld holds an index. If the file becomes corrupt or unreadable, it forces Windows to run chkdsk and output some error messages. To resolve the issue, you might need to reformat the hard drive and restore lost data using your recent backup. But sometimes, backup gives corruption errors or insufficient results. In such situations, it becomes essential that you use hard drive recovery applications to restore the lost data.

You might observe the following symptoms with your Windows based system:

1. You start the computer and observe a blue screen with an error suggesting to run chkdsk

2. If you choose to run chkdsk check, you get an unending loop of error messages after its completion:

"Inserting an index entry into $0 of file 25"

3. If you cancel the chkdsk check, you get these error messages in sequence:

"WINLOGON.EXE - corrupt file"

And

"The file or directory $Extend$Objld is corrupt and unreadable. Please run the Chkdsk utility"

Cause

Extend$Objld file is corrupted. It can occur due to physical drive errors or unexpected shutdown while NTFS was updating the file. chkdsk might take sufficient time to update the file because the file is heavily fragmented.

Solution

To solve such issues, you require following these steps:

1. Use the particular diagnostic utility for the hard drive to test it for physical problems.

2. If the diagnostic utility doesn´t return any confirmatory results related to drive physical issues, you need to reformat the partition and restore lost data from backup.

In any case if you find data backup as damaged, insufficient or absent, you need to use hard drive recovery software. These are commercial applications specifically built to locate and restore lost data, unless it is overwritten. Such hard drive recovery tools are graphically rich tools with advanced technology to recover data.

Stellar Phoenix Windows Data Recovery is a complete hard drive recovery software that supports Windows 7 (currently in RC1), Vista, XP, 2003 and 2000. It is a read-only application that provides advanced features like Drive Cloning, Disk Imaging, RAW File Recovery and Drive Status. It supports FAT32, VFAT, NTFS and NTFS5 file system drives.