Microsoft Releases HotFix For Windows 7, Windows Server 2008 R2 Volume Corruption

Microsoft has released a hotfix for fixing a very serious issue in Windows 7 or Windows Server 2008 R2 that is affecting users whose computers are attached with hard drives larger than 2 terabytes of disk space. The consequences of this bug is very fatal and may cause volume corruption and if the corrupted volumes include the system partition, than users cannot start the computer.

This issue occurs because of the crash dump disk driver (Diskdump.sys) cannot address more than 2 terabytes of disk space. The Diskdump.sys driver can address up to 2 to the power of 32 sectors. If the sector size is 512 bytes, the driver can address up to 2 terabytes of disk space. If the actual offset is larger than this limitation, the driver incorrectly truncates the offset and saves data to a wrong location. Therefore, one or more volumes on the disk are corrupted.

This issue also occurs when the operating system enters into hibernation and generates a Hiberfile.sys file that is at a disk offset greater than the 2 terabyte disk offset of the hard disk drive. It may also occur when the operating system crashes, generates a Stop code error message, and saves memory data to a dump file. In this scenario, one or more volumes of the hard disk drive may be corrupted. Additionally, all data on these volumes are lost.

Microsoft has created a hotfix that should only be installed by users with computer systems with hard drives larger than 2 terabytes. It is recommended for the users who may have similar system configuration to install the hotfix and avoid any possible corruption issues. The computer needs to be restarted after applying the hotfix.

Users without hard drives larger than 2 terabytes do not need to install the hotfix.

The hotfix can be directly downloaded from the Microsoft Knowledgebase through the link below:

Download HotFix KB2249857


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