Adding Members to an Existing Group

Initially, a PS Series group has only one member. Although this configuration is fully functional, adding more members expands the capacity of the group, increases network bandwidth, and improves overall performance. As the group scales, there is no disruption to I/O operations. See the PS Series Release Notes for the maximum members in a group.

In addition, a multi-member group enables you to divide group space into multiple storage pools. See Storage Pool Management for more information.

You can use the setup utility to configure an array and add it to an existing group. First, be sure the array hardware is set up and there are no errors or red LEDs. For hardware installation information, see the PS Series QuickStart or SAN Setup poster for your model array.

Note: If you have a Microsoft Windows system, you can use the Remote Setup Wizard to configure an array, add it to an existing group, and set up connectivity between the system and the group.

The wizard is part of the Host Integration Tools kit, which is on the CD-ROM shipped with each array and the Technical Support website.

Follow these steps to use the setup utility to add a member to an existing group:

  1. Gather the member configuration described in Table 2: Member Configuration. See your network administrator to obtain an IP address for the new group member.
  2. Also, you will need the name and IP address for the group that the array will join, in addition to the password for managing group membership.

    Be sure to follow the network requirements and recommendations listed in Table 1: Network Requirements and Recommendations. For the latest networking recommendations, see the related Technical Report on the Technical Support website.

  3. Set up a serial connection to the array. Use the serial cable configuration that shipped with the array and connect the cable to Serial Port 0 on the active control module (ACT LED will be green).
  4. The serial connection must have the following characteristics:

  5. Log in to the grpadmin account. Press the key and, when prompted, enter the grpadmin account name and factory-set password, which is also grpadmin. Note that passwords are not echoed on the console.
  6. Login: grpadmin


                   Welcome to Group Manager
                Copyright 2001 - 2007 EqualLogic, Inc.


    It appears that the storage array has not been configured.

    Would you like to configure the array now? (y/n) [n]

  7. When prompted, enter y to invoke the setup utility. You can also run setup later at the console prompt (>). At each setup prompt, enter a question mark (?) for help. Press the key to accept a default (shown in brackets).
  8. Specify the member configuration and group information at the prompts. This is the information described in Table 2: Member Configuration. In addition, you will be prompted for the name, IP address and membership password for the group you want to join. There may be a short delay as setup locates the group on the network.

Once the array is successfully added to the new group, use the Group Manager GUI or CLI to set the RAID policy for the new member.

The storage in the new member will be available once you set the RAID policy. The disks are automatically configured according to the designated RAID level, with the appropriate number of spare disks. Until the RAID configuration completes, performance will not be optimal, but the group is fully operational.

See Using the Group Manager Graphical User Interface and Using the Group Manager Command Line Interface for information on the starting the Group Manager user interfaces. See Introduction to Member RAID Policies for information on setting the RAID policy.