Creating a Storage Group
Using a graphical user interface
Using a command-line interface
dn: CN=< Storage Group Name>,<ParentDN> changetype: add objectClass: msExchStorageGroup cn: < Storage Group Name> showInAdvancedViewOnly: TRUE systemFlags: 1610612736 msExchESEParamEnableIndexChecking: TRUE msExchESEParamEnableOnlineDefrag: TRUE msExchESEParamSystemPath: <Path to store system files> msExchESEParamPageFragment: 8 msExchESEParamPageTempDBMin: 0 msExchRecovery: TRUE msExchESEParamZeroDatabaseDuringBackup: 0 msExchESEParamBaseName: E01 msExchESEParamCircularLog: 0 msExchESEParamEventSource: MsExchangeIS msExchESEParamCheckpointDepthMax: 20971520 msExchESEParamCommitDefault: 0 msExchESEParamLogFilePath: <Path to log files> msExchESEParamDbExtensionSize: 256 msExchESEParamLogFileSize: 5120
Replace < Storage Group Name> with the name of the storage group, <ParentDN> with the distinguished named for storage groups container for the appropriate server, <Path to store system files> with the filesystem path where you want system files (temporary and recovered files), and <Path to log files> with the filesystem path where you want exchange log files. Then run the following command:
>ldifde -i -f add-sg.ldf
' This code creates a Storage Group. ' ------ SCRIPT CONFIGURATION ------ strServer = "< Exchange Server>" ' e.g. ExchServer2 strName = "<Storage Group Name>" ' e.g. SG1 strPath = "<File Path>" & strName ' e.g. D:\Program Files\ExchSrvr ' ------ END CONFIGURATION --------- ' Create URL to Storage Group Set objSrv = CreateObject("CDOEXM.ExchangeServer") objSrv.DataSource.Open strServer ' This for loop is a bit of a hack to retrieve the first Storage Group ' in the collection. VBScript doesn't let you access specific elements ' of a collection the way Jscript can. for each strSg in objSrv.StorageGroups strTemp = strSg exit for next strTemp = mid(strTemp,instr(2,strTemp,"cn",1)) strSGUrl = "LDAP://cn=" & strName & "," & strTemp ' Create/configure Storage Group and save it set objSG = CreateObject("CDOEXM.StorageGroup") objSG.MoveSystemFiles(strPath) objSG.MoveLogFiles(strPath) objSG.DataSource.SaveTo strSGUrl Wscript.Echo "Successfully created storage group."
Storage groups are used for physically breaking your databases up into smaller management groups. This is done for several reasons. Chief among them are so you will have more numerous but smaller databases, a logical organization of mailboxes, or faster Exchange backups and restores since the Exchange Server can run one simultaneous backup for each storage group. For example, if you have four mailbox databases in a single storage group, you can only have one backup running for that storage group; if you spread those four mailbox databases across two storage groups, you can run two simultaneous backups. For more detailed information on Exchange backups and file structures, see the Exchange Server Cookbook by Paul Robichaux et al. (O'Reilly).
Depending on the version (Standard or Enterprise) of Exchange, you can have up to four storage groups per server and up to five mailbox stores per storage group. ESM enforces these limits, but it is possible to directly modify Active Directory to exceed them. If you create more databases or storage groups than allowed by your version, the additional databases will not mount. In Exchange 2003, Microsoft recommends that you spread your mailboxes across as many stores and storage groups as possible; this is because of memory management improvements since Exchange 2000.
Storage groups are represented in Active Directory by the msExchStorageGroup class. This class has several attributes that have fairly intuitive string values and names and can be matched up to the options in ESM. Unfortunately, the raw Active Directory objects and attributes and their valid values for Exchange are not well documented. You can experiment with their settings, but you should do so only in a lab environment.
Using a Command-Line Interface
The process of calling the CDOEXM interfaces to create storage groups is rather straightforward once you have the URL for the location of the object in Active Directory. In this solution, to get the distinguished name of the storage group container for the server, the script loops through all storage groups on the sever and sets strTemp to the URL value of the last storage group. This value is then parsed to get the parent container for the storage groups to build the new storage group URL.
Recipe 22.7, MS KB 821748 (How to Add New Mailbox Stores in Exchange Server 2003), MS KB 890699 (How to Configure Storage Groups in Exchange Server 2003), and Exchange Server Cookbook by Paul Robichaux et al. (O'Reilly)