http://technet.microsoft.com/en-us/library/cc733048.aspx
also can see via dcpromo /?:promotion, no need to remember,type dcpromo /?, can see the help
The following options are available for the Promotion operation during an unattended installation of Active Directory Domain Services (AD DS) in Windows Server 2008 and Windows Server 2008 R2. Options that were new in Windows Server 2008 appear in bold text.
Parameter
Possible values
Default value
Description
/AllowDomainReinstall
Yes | No
No
Specifies whether an existing domain is re-created.
/AllowDomainControllerReinstall
Yes | No
No
Specifies whether to continue installing this domain controller despite the fact that an active domain controller account with the same name is detected. Specify Yes only if you are sure that the account is no longer in use.
/ApplicationPartitionsToReplicate
"partition_DN_1 partition_DN_2 ...partition_DN_n"
Specifies application partitions to be replicated in the format of "partition1" "partition2". If * is specified, all application partitions will be replicated.
Use space-separated (or comma-and-space-separated) distinguished names, with the entire string enclosed in quotation marks.
/AutoconfigDNS
This parameter has been renamed to /InstallDNS.
Yes | No
Computed automatically based on the environment.
Specifies whether Domain Name System (DNS) is configured for a new domain if Dcpromo detects that the DNS dynamic update protocol is not available or if Dcpromo detects an insufficient number of DNS servers for an existing domain.
/ChildName
child_domain_name
Specifies the single-label DNS name of the child domain.
/ConfirmGc
Yes | No
Specifies whether the domain controller is a global catalog server.
/CreateDNSDelegation
Yes | No
Computed automatically based on the environment.
Indicates whether to create a DNS delegation that refers to this new DNS server. Valid for Active Directory�Cintegrated DNS only.
/CriticalReplicationOnly
Yes | No
No
Specifies whether the promotion operation performs only critical replication before reboot and then continues, skipping the noncritical (and potentially lengthy) portion of replication. The noncritical replication happens after the role installation finishes and the computer restarts.
/DatabasePath
path_to_database_files
%systemroot%\NTDS
Specifies the fully qualified, non�CUniversal Naming Convention (UNC) path to a directory on a fixed disk of the local computer that contains the domain database, for example, C:\Windows\NTDS.
/DelegatedAdmin
User or group
Specifies the name of the user or group who will install and administer the read-only domain controller (RODC). If no value is specified, only members of the Domain Admins group or Enterprise Admins group can install and administer the RODC.
/DNSDelegationPassword
Password | *
Specifies the password for the user name (the account credentials) that is used to create or remove the DNS delegation. Specify * to prompt the user to enter credentials.
/DNSDelegationUserName
user_name
Specifies the user name to be used when the DNS delegation is created or removed. If you do not specify a value, the account credentials that you specify for the AD DS installation or removal are used for the DNS delegation.
/DNSOnNetwork
Yes | No
Yes
Specifies whether the DNS Server service is available on the network. This parameter is used only when the network adapter for this computer is not configured with the name of a DNS server for name resolution. Specifying No indicates that the DNS server will be installed on this computer for name resolution. Otherwise, the network adapter must be configured with a DNS server name first.
/DomainLevel
0 | 2 | 3 | 4
Based on the current forest functional level.
Specifies the domain functional level when a new domain is created in an existing forest, as follows:
0 = Windows 2000 native
2 = Windows Server 2003
3 = Windows Server 2008
4 = Windows Server 2008 R2
/DomainNetBiosName
domain_NetBIOS_name
Left-most label of the DNS name.
Assigns a NetBIOS name to the new domain.
/ForestLevel
0 | 2 | 3 | 4
0 (for Windows Server 2008)
2 (for Windows Server 2008 R2)
Specifies the forest functional level when a new domain is created in a new forest, as follows:
0 = Windows 2000
2 = Windows Server 2003
3 = Windows Server 2008
4 = Windows Server 2008 R2
ForestLevel replaces SetForestVersion in Windows Server 2003.
Do not use this switch when you are installing a domain controller in an existing forest.
/InstallDNS
This switch replaces /AutoConfigDNS.
Yes | No
Computed automatically based on the environment.
Specifies whether DNS is configured for a new domain if Dcpromo detects that the DNS dynamic update protocol is not available or if Dcpromo detects an insufficient number of DNS servers for an existing domain.
/LogPath
Path_to_log_files
%systemroot%\ NTDS
Specifies the fully qualified, non-UNC path to a directory on a fixed disk of the local computer that contains the domain log files, for example, C:\Windows\NTDS.
/NewDomain
Forest | Tree | Child
Forest
Specifies the type of new domain:
The root domain of a new forest
The root domain of a new tree in an existing forest
A child domain in an existing forest
The type of new domain must be specified when AD DS is installed on a Server Core installation.
/NewDomainDNSName
DNS_domain_name
Specifies a fully qualified domain name (FQDN) for the new domain.
/ParentDomainDNSName
DNS_domain_name
Specifies the FQDN of an existing parent domain when a child domain is installed.
/Password
Password | *
Specifies the password that corresponds to the user name (account credentials) that is used to promote the domain controller. Specify * to prompt the user to enter credentials.
/PasswordReplicationAllowed
Security_Principal | NONE
Specifies the names of computer and user accounts whose passwords can be replicated to this RODC. Specify "None" if you want to keep the value empty. By default, no user credentials will be cached on this RODC. To specify more than one security principal, add the entry multiple times.
/PasswordReplicationDenied
Security_Principal | None
Specifies the names of user, group, and computer accounts whose passwords are not to be replicated to this RODC. Specify None if you do not want to deny the replication of credentials of any users or computers. To specify more than one security principal, add the entry multiple times.
/RebootOnCompletion
Yes | No
Yes
Specifies whether to restart the computer upon completion, regardless of success.
/RebootOnSuccess
Yes | No| NoAndNoPromptEither
This command is deprecated but still supported. You should use /RebootOnCompletion instead.
Yes
Specifies whether to restart the computer upon successful completion of an operation.
/ReplicaDomainDNSName
DNS_domain_name
Specifies the FQDN of the domain in which you want to promote an additional domain controller.
/ReplicaOrNewDomain
Replica | ReadOnlyReplica | Domain
Replica
Specifies whether to install the domain controller as:
An additional domain controller in an existing domain
An RODC in an existing domain
The first domain controller in a new domain
/ReplicationSourceDC
DNS_name_of_source
Indicates the FQDN of the partner domain controller from which Active Directory data is replicated to create the new domain controller.
/ReplicationSourcePath
path_to_installation_media
Indicates the location of the installation media that will be used to install a new domain controller.
/SafeModeAdminPassword
password | NONE
The password for the administrator account to use when you start the computer in Safe Mode or a variant of Safe Mode, such as Directory Service Restore Mode (DSRM). You cannot specify a blank password.
/SiteName
site_name
See the note below this table.
The name of an existing site where you can place the new domain controller.
/SkipAutoConfigDNS
No value is required.
This switch is for expert users who want to skip automatic configuration of client settings, forwarders, and root hints. The switch is in effect only if the DNS Server service is already installed on the server, in which case you will receive an informational message confirming that the automatic configuration of DNS was skipped. Otherwise, this switch is ignored. If you specify this switch, ensure that zones are created and properly configured before you install AD DS or the domain controller will not operate correctly. This switch does not skip automatic creation of the DNS delegation in the parent DNS zone. To control DNS delegation creation, use the /CreateDNSDelegation switch.
/Syskey
NONE | system key
Specifies the system key for the media from which you replicate the data.
/SysVolPath
path_to_SYSVOL_folder
%systemroot%\ sysvol
Specifies the fully qualified, non-UNC path to a directory on a fixed disk of the local computer, for example, C:\Windows\SYSVOL.
/TransferIMRoleIfNeeded
Yes | No
No
Specifies whether to transfer the infrastructure master role to this domain controller, in case it is currently hosted on a global catalog server and you do not plan to make this domain controller a global catalog server. Choose Yes to transfer the infrastructure master role to this domain controller in case this is needed. If you choose Yes, be sure to specify /ConfirmGC:No.
/UserDomain
domain_name
Specifies the domain name for the user name (account credentials) that is used for promoting a domain controller.
/UserName
Domain\user_name
Specifies the user name (account credentials) that is used for promoting a domain controller. We recommend that you specify the account credentials in the domain\user_name format.