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Set System State Backup Policy
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This page contains Windows bias

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This page is part of the Azure documentation. It contains code examples and configuration instructions for working with Azure services.
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Bias Analysis

Detected Bias Types
powershell_heavy
windows_tools
missing_linux_example
windows_first
Summary
The documentation exclusively provides a PowerShell script using Windows-specific modules (e.g., MSOnlineBackup) and registry paths, with no mention of Linux or cross-platform alternatives. All instructions and next steps are tailored to Windows environments, and there are no examples or guidance for Linux users.
Recommendations
  • Add equivalent script samples for Linux environments, using bash or Python where possible.
  • Document whether the MARS agent or similar backup functionality is available on Linux, and if so, provide Linux-specific instructions.
  • If the feature is Windows-only, clearly state this limitation at the beginning of the documentation.
  • Include a comparison table or section outlining differences in backup policy management between Windows and Linux platforms.
  • Provide links to Linux backup policy documentation or third-party tools if native support is unavailable.
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Scan History

Date Scan Status Result
2025-07-12 23:44 #41 cancelled Biased Biased
2025-07-12 00:58 #8 cancelled Clean Clean
2025-07-10 05:06 #7 processing Clean Clean

Flagged Code Snippets

<#

.SYNOPSIS
Modify system state policy

.DESCRIPTION
Modify system state policy

.ROLE
Administrators

#>
param (
    [Parameter(Mandatory = $true)]
    [string[]]
    $daysOfWeek,
    [Parameter(Mandatory = $true)]
    [string[]]
    $timesOfDay,
    [Parameter(Mandatory = $true)]
    [int]
    $weeklyFrequency,

    [Parameter(Mandatory = $false)]
    [int]
    $retentionDays,

    [Parameter(Mandatory = $false)]
    [Boolean]
    $retentionWeeklyPolicy,
    [Parameter(Mandatory = $false)]
    [int]
    $retentionWeeks,

    [Parameter(Mandatory = $false)]
    [Boolean]
    $retentionMonthlyPolicy,
    [Parameter(Mandatory = $false)]
    [int]
    $retentionMonths
)
Set-StrictMode -Version 5.0
$env:PSModulePath = (Get-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Session Manager\Environment' -Name PSModulePath).PSModulePath
Import-Module MSOnlineBackup
$ErrorActionPreference = "Stop"
Try {
    $oldPolicy = Get-OBSystemStatePolicy
    if ($oldPolicy) {
        return
    }
    $policy = New-OBPolicy
    $policy = Add-OBSystemState -Policy $policy

    $timesOfDaySchedule = @()
    foreach ($time in $timesOfDay) {
        $timesOfDaySchedule += ([TimeSpan]$time)
    }
    $daysOfWeekSchedule = @()
    foreach ($day in $daysOfWeek) {
        $daysOfWeekSchedule += ([System.DayOfWeek]$day)
    }

    $schedule = New-OBSchedule -DaysOfWeek $daysOfWeekSchedule -TimesOfDay $timesOfDaySchedule -WeeklyFrequency $weeklyFrequency
    if ($daysOfWeekSchedule.Count -eq 7) {
        if ($retentionWeeklyPolicy -and $retentionMonthlyPolicy) {
            $retention = New-OBRetentionPolicy -RetentionDays $retentionDays -RetentionWeeklyPolicy:$true -WeekDaysOfWeek $daysOfWeekSchedule -WeekTimesOfDay $timesOfDaySchedule -RetentionWeeks $retentionWeeks -RetentionMonthlyPolicy:$true -MonthDaysOfWeek $daysOfWeekSchedule -MonthTimesOfDay $timesOfDaySchedule -RetentionMonths $retentionMonths
        }
        elseif ($retentionWeeklyPolicy) {
            $retention = New-OBRetentionPolicy -RetentionDays $retentionDays -RetentionWeeklyPolicy:$true -WeekDaysOfWeek $daysOfWeekSchedule -WeekTimesOfDay $timesOfDaySchedule -RetentionWeeks $retentionWeeks
        }
        elseif ($retentionMonthlyPolicy) {
            $retention = New-OBRetentionPolicy -RetentionDays $retentionDays -RetentionMonthlyPolicy:$true -MonthDaysOfWeek $daysOfWeekSchedule -MonthTimesOfDay $timesOfDaySchedule -RetentionMonths $retentionMonths
        }
        else {
            $retention = New-OBRetentionPolicy -RetentionDays $retentionDays
        }
    }
    else {
        if ($retentionWeeklyPolicy -and $retentionMonthlyPolicy) {
            $retention = New-OBRetentionPolicy -RetentionWeeklyPolicy:$true -WeekDaysOfWeek $daysOfWeekSchedule -WeekTimesOfDay $timesOfDaySchedule -RetentionWeeks $retentionWeeks -RetentionMonthlyPolicy:$true -MonthDaysOfWeek $daysOfWeekSchedule -MonthTimesOfDay $timesOfDaySchedule -RetentionMonths $retentionMonths
        }
        elseif ($retentionWeeklyPolicy) {
            $retention = New-OBRetentionPolicy -RetentionWeeklyPolicy:$true -WeekDaysOfWeek $daysOfWeekSchedule -WeekTimesOfDay $timesOfDaySchedule -RetentionWeeks $retentionWeeks
        }
        elseif ($retentionMonthlyPolicy) {
            $retention = New-OBRetentionPolicy -RetentionMonthlyPolicy:$true -MonthDaysOfWeek $daysOfWeekSchedule -MonthTimesOfDay $timesOfDaySchedule -RetentionMonths $retentionMonths
        }
    }
    Set-OBSchedule -Policy $policy -Schedule $schedule
    Set-OBRetentionPolicy -Policy $policy -RetentionPolicy $retention
    Set-OBSystemStatePolicy -Policy $policy -Confirm:$false
}
Catch {
    if ($error[0].ErrorDetails) {
        throw $error[0].ErrorDetails
    }
    throw $error[0]
}