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mirror's Introduction

Mirror

Drive backup script in PowerShell with Shadow Copy support. Optional Jenkins project included.

Warning

Warning! The script completely erases the target drive! Only keeps files that are the same on the source drive. Do NOT run the script on drives you would like to preserve!

Usage

Open up PowerShell, navigate to the folder, and execute the command:

.\Mirror.ps1 sourceDrive: targetDrive: shadowDrive: -Verbose

Where sourceDrive is the drive you would like to backup, targetDrive is the backup drive, and shadowDrive is a free drive letter that will be used for a temporary snapshot of the source drive.

For example the following command will backup c: drive to d: drive with b: as the temporary drive letter:

.\Mirror.ps1 c: d: b: -Verbose

Usage in Jenkins

Download or fork the project, change Jenkinsfile to your preferences, and create a new pipeline job with it. Preferably do not clone the project because at any time I could make modifications that break your data.

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mirror's Issues

Shadow Copy context Backup is not supported

Win32_ShadowCopy.Create method only accepts ClientAccessible and NASRollback context. Does not accept All, AppRollback, Backup, FileShareBackup context.

As a result, if the backup script crashes, the shadow copy is not removed, and causes data loss. When the Jenkins job was stuck and I had to abort it, the Jenkins log file was filled with zeroes after a certain point.

Find a goddamn workaround.

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