18.16. Storage Devices

Procedure 18.1. iSCSI Discovery and Starting an iSCSI Session

1. Enter the IP address of the iSCSI target in the Target IP Address field.
2. Provide a name in the iSCSI Initiator Name field for the iSCSI initiator in iSCSI qualified name (IQN) format. A valid IQN entry contains:
   • the string iqn. (note the period)
   • a date code that specifies the year and month in which your organization's Internet domain or subdomain name was registered, represented as four digits for the year, a dash, and two digits for the month, followed by a period. For example, represent September 2010 as 2010-09.
   • your organization's Internet domain or subdomain name, presented in reverse order with the top-level domain first. For example, represent the subdomain storage.example.com as com.example.storage
   • a colon followed by a string that uniquely identifies this particular iSCSI initiator within your domain or subdomain. For example, :diskarrays-sn-a8675309
   A complete IQN can therefore look as follows: iqn.2010-09.storage.example.com:diskarrays-sn-a8675309 . Anaconda prepopulates the iSCSI Initiator Name field with a name in this format to help you with the structure.
   For more information on IQNs , see 3.2.6. iSCSI Names in RFC 3720 - Internet Small Computer Systems Interface (iSCSI) available from http://tools.ietf.org/html/rfc3720#section-3.2.6 and 1. iSCSI Names and Addresses in RFC 3721 - Internet Small Computer Systems Interface (iSCSI) Naming and Discovery available from http://tools.ietf.org/html/rfc3721#section-1.
3. Use the Discovery Authentication Type drop-down menu to specify the type of authentication to use for iSCSI discovery. The following options are available:
   • no credentials
   • CHAP pair
   • CHAP pair and a reverse pair
4. • If you selected CHAP pair as the authentication type, provide the user name and password for the iSCSI target in the CHAP Username and CHAP Password fields.
   • If you selected CHAP pair and a reverse pair as the authentication type, provide the user name and password for the iSCSI target in the CHAP Username and CHAP Password field and the user name and password for the iSCSI initiator in the Reverse CHAP Username and Reverse CHAP Password fields.
5. Optionally check the box labeled Bind targets to network interfaces.
6. Click the Start Discovery button. Anaconda attempts to discover an iSCSI target based on the information that you provided. If discovery succeeds, the dialog displays a list of all iSCSI nodes discovered on the target.
7. Each node is presented with a check box beside it. Click the check boxes to select the nodes to use for installation.
   

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   Figure 18.31. The Dialog of Discovered iSCSI Nodes

8. The Node login authentication type menu provides the same options as the Discovery Authentication Type menu described in step 3. However, if you needed credentials for discovery authentication, it is typical to use the same credentials to log into a discovered node. To do that, use the additional Use the credentials from discovery option from the menu. When the proper credentials have been provided, the Log In button becomes available.
9. Click Log In to initiate an iSCSI session.