Monitor SQL Database mirroring using powershell script

Question

I am trying use the below powershell script to monitor SQL Database mirroring. The motive here is to determine if there are databases which are in "Disconnected" or "Suspended" mode.
I am running the script on the Principal Server:
$returnStateOK = 0
$returnStateWarning = 1
$returnStateCritical = 2
$returnStateUnknown = 3
$NagiosStatus = ""
# Load SMO extension
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SqlServer.Smo") | Out-Null;
# Servers to check
$sqlservers = @("$env:computername");
foreach($server in $sqlservers)
$srv = New-Object "Microsoft.SqlServer.Management.Smo.Server" $server;
# Get mirrored databases
$databases = $srv.Databases | Where-Object {$_.IsMirroringEnabled -eq $true -and $_.MirroringStatus -eq "Suspended" -or $_.MirroringStatus -eq "Synchronizing" -or $_.MirroringStatus -eq "Disconnected"
-or $_.MirroringStatus -eq "None"  -and $_.Name -ne "Master" -and $_.Name -ne "model" -and $_.Name -ne "msdb" -and $_.Name -ne "tempdb"};
if ($databases -ne $null)
$databases | Select-Object -Property Name, MirroringStatus | Format-Table -AutoSize;
exit $returnStateCritical
} Else {
Write-Host "All Databaes are Mirrored"
exit $returnStateOK
I have Suspended few databases for testing purpose but when I run the above script the output says "All Databaes are Mirrored"
If I make changes to $database and use it below i.e. I am changing the AND operator to OR after "$_.IsMirroringEnabled -eq $true"
$databases = $srv.Databases | Where-Object {$_.IsMirroringEnabled -eq $true -or $_.MirroringStatus -eq "Suspended" -or $_.MirroringStatus -eq "Synchronizing" -or $_.MirroringStatus
-eq "Disconnected" -or $_.MirroringStatus -eq "None"  -and $_.Name -ne "Master" -and $_.Name -ne "model" -and $_.Name -ne "msdb" -and $_.Name -ne "tempdb"};
I get the below output:
Name                                                                        
   MirroringStatus
DB1                                                                    
  Synchronized
DB2                                                                    
  Synchronized
DB3                                                                       Synchronized
DB4                                                                   
Suspended
DB5                                                                       Suspended
DB6                  
     Suspended
DB7                                                              
        Synchronized
DB8                                                              
        Synchronized
I only want the databases which are Suspended or Disconnected to be listed.

Answer 1

I only want the databases which are Suspended or Disconnected to be listed.
Hi raul-133,
Based on your description, to list the databases which are Suspended or Disconnected ,I recommend you execute the following Transact-SQL statements in SQL Server firstly. If you can get the expected results from this query, then use the SQL Server query
in powershell script. For more details, please review this similar blog:
Monitor database mirroring.
Use master
go
select d.name, m.mirroring_state_desc
from sys.database_mirroring m,
sys.databases d
where m.database_id = d.database_id and (m.mirroring_state in (0,1))
For more details about mirroring state, you can review this article:
sys.database_mirroring (Transact-SQL).
Thanks,
Lydia Zhang