Error: The number of configured copies for database 'DB-1' (1) is less than the required redundancy count (2).

Question

Hello , I think the below event alert 4113 is very common and is due to that only one database copy is present in DAG but is there any way we can stop this alert for the
specific database.  
The message tells that there is only one copy of the database - create another copy and the warning message will go away but
we do not want to create another copy. So is there any way we can stop this event getting generated.
Database redundancy health check failed.
Database copy: DB-1
Redundancy count: 1
Error: The number of configured copies for database 'DB-1' (1) is less than the required redundancy count (2).
Name                 Status RealCopyQueu InspectorQue  ReplayQueue      CIState
                                       e          
ue                          
DB-1\       Mounted            0            0            0     
Healthy
MAILSRV2
===============
 Full Status
===============
Identity                         : DB-1\MAILSRV2
Name                             : DB-1\MAILSRV2
DatabaseName                     : DB-1
Status                           : Mounted
MailboxServer                    : MAILSRV2
ActiveDatabaseCopy               : MAILSRV2
ActivationSuspended              : False
ActionInitiator                  : Unknown
ErrorMessage                     :
ErrorEventId                     :
ExtendedErrorInfo                :
SuspendComment                   :
SinglePageRestore                : 0
ContentIndexState                : Healthy
ContentIndexErrorMessage         :
CopyQueueLength                  : 0
ReplayQueueLength                : 0
LatestAvailableLogTime           :
LastCopyNotificationedLogTime    :
LastCopiedLogTime                :
LastInspectedLogTime             :
LastReplayedLogTime              :
LastLogGenerated                 : 0
LastLogCopyNotified              : 0
LastLogCopied                    : 0
LastLogInspected                 : 0
LastLogReplayed                  : 0
LogsReplayedSinceInstanceStart   : 0
LogsCopiedSinceInstanceStart     : 0
LatestFullBackupTime             :
LatestIncrementalBackupTime      :
LatestDifferentialBackupTime     :
LatestCopyBackupTime             :
SnapshotBackup                   :
SnapshotLatestFullBackup         :
SnapshotLatestIncrementalBackup  :
SnapshotLatestDifferentialBackup :
SnapshotLatestCopyBackup         :
LogReplayQueueIncreasing         : False
LogCopyQueueIncreasing           : False
OutstandingDumpsterRequests      : {}
OutgoingConnections              :
IncomingLogCopyingNetwork        :
SeedingNetwork                   :
ActiveCopy                       : True
Thanks

Answer 1

That regex looks odd to me.  I assume you have databases with names like "Mailbox Database <ten digit number>" (standard Exchange default name, in other words), "ABC-DB" and "HOME-DB".  If this is the case, wouldn't
you want "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"?  THis works if I run it from a prompt:
[PS] C:\Scripts>"Mailbox Database 0123456789" -match "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"
True
[PS] C:\Scripts>"Mailbox Database 123456789" -match "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"
False
[PS] C:\Scripts>"Mailbox Database 12345678910" -match "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"
False
[PS] C:\Scripts>"HOME-DB" -match "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"
True
[PS] C:\Scripts>"ABC-DB" -match "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"
True
[PS] C:\Scripts>"ABCD-DB" -match "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"
False
[PS] C:\Scripts>"HOM-DB" -match "(?:Mailbox Database \d{10}$|^ABC-DB$|^HOME-DB$)"
False
I find it's easiest to test RegEx's from the prompt this way.  If the above isn't your goal, let us know, and we'll see if we can come up with something better.