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Sun Cluster 3.0 12/01 Hardware Guide

How to Install a StorEdge MultiPack Enclosure

Use this procedure for an initial installation of a StorEdge MultiPack enclosure, prior to installing the Solaris operating environment and Sun Cluster software. Perform this procedure in conjunction with the procedures in the Sun Cluster 3.0 12/01 Software Installation Guide and your server hardware manual.

Multihost storage in clusters uses the multi-initiator capability of the Small Computer System Interface (SCSI) specification. For conceptual information on multi-initiator capability, see the Sun Cluster 3.0 12/01 Concepts document.

Caution - Caution -

SCSI-reservations failures have been observed when clustering StorEdge MultiPack enclosures that contain a particular model of Quantum disk drive: SUN4.2G VK4550J. Avoid the use of this particular model of Quantum disk drive for clustering with StorEdge MultiPack enclosures. If you do use this model of disk drive, you must set the scsi-initiator-id of the "first node" to 6. If you are using a six-slot StorEdge MultiPack enclosure, you must also set the enclosure for the 9-through-14 SCSI target address range. For more information, see the Sun StorEdge MultiPack Storage Guide.

  1. Ensure that each device in the SCSI chain has a unique SCSI address.

    The default SCSI address for host adapters is 7. Reserve SCSI address 7 for one host adapter in the SCSI chain. This procedure refers to node that has SCSI address 7 as the "second node."

    To avoid conflicts, in Step 7 you change the scsi-initiator-id of the remaining host adapter in the SCSI chain to an available SCSI address. This procedure refers to the node that has an available SCSI address as the "first node."

    For a partial list of nvramrc editor and nvedit keystroke commands, see Appendix B, NVRAMRC Editor and NVEDIT Keystroke Commands of this guide. For a full list, see the OpenBoot 3.x Command Reference Manual.

    Note -

    Even though a slot in the enclosure might not be in use, do not set the scsi-initiator-id for the first node to the SCSI address for that disk slot. This precaution minimizes future complications if you install additional disk drives.

  2. Install the host adapters in the nodes that will be connected to the StorEdge MultiPack enclosure.

    For the procedure on installing a host adapter, see the documentation that shipped with your host adapter and node hardware.

  3. Connect the cables to the StorEdge MultiPack enclosure, as shown in Figure 4-1.

    Make sure that the entire SCSI bus length to each StorEdge MultiPack enclosure is less than 6 m. This measurement includes the cables to both nodes, as well as the bus length internal to each StorEdge MultiPack enclosure, node, and host adapter. Refer to the documentation that shipped with the StorEdge MultiPack enclosure for other restrictions about SCSI operation.

    Figure 4-1 Example of a StorEdge MultiPack Enclosure Mirrored Pair

    Graphic

  4. Connect the AC power cord for each StorEdge MultiPack enclosure of the mirrored pair to a different power source.

  5. Power on the first node but do not allow it to boot. If necessary, halt the node to continue with OpenBootTM PROM (OBP) Monitor tasks. The first node is the node with an available SCSI address.

  6. Find the paths to the host adapters. 


    {0} ok show-disks
a) /pci@1f,4000/pci@4/SUNW,isptwo@4/sd
b) /pci@1f,4000/pci@2/SUNW,isptwo@4/sd

    Identify and record the two controllers that are to be connected to the storage devices, and record these paths. Use this information to change the SCSI addresses of these controllers in the nvramrc script in Step 7. Do not include the /sd directories in the device paths.

  7. Edit the nvramrc script to set the scsi-initiator-id for the host adapters on the first node.

    For a partial list of nvramrc editor and nvedit keystroke commands, see Appendix B, NVRAMRC Editor and NVEDIT Keystroke Commands. For a full list of commands, see the OpenBoot 3.x Command Reference Manual.

    The following example sets the scsi-initiator-id to 6. The OpenBoot PROM Monitor prints the line numbers (0:, 1:, and so on).

    Note -

    Insert exactly one space after the first quotation mark and before scsi-initiator-id. 


    {0} ok nvedit 
0: probe-all
1: cd /pci@1f,4000/pci@4/SUNW,isptwo@4
2: 6 " scsi-initiator-id" integer-property 
3: device-end 
4: cd /pci@1f,4000/pci@2/SUNW,isptwo@4 
5: 6 " scsi-initiator-id" integer-property 
6: device-end 
7: install-console 
8: banner <Control C> 
{0} ok

  8. Store the changes.

    The changes you make through the nvedit command are recorded on a temporary copy of the nvramrc script. You can continue to edit this copy without risk. After you complete your edits, save the changes. If you are not sure about the changes, discard them.

    • To store the changes, type:


      {0} ok nvstore
{0} ok

    • To discard the changes, type:


      {0} ok nvquit
{0} ok

  9. Verify the contents of the nvramrc script you created in Step 7, as shown in the following example.

    If the contents of the nvramrc script are incorrect, use the nvedit command to make corrections.


    {0} ok printenv nvramrc 
nvramrc =             probe-all
                      cd /pci@1f,4000/pci@4/SUNW,isptwo@4
                      6 " scsi-initiator-id" integer-property 
                      device-end 
                      cd /pci@1f,4000/pci@2/SUNW,isptwo@4
                      6 " scsi-initiator-id" integer-property  
                      device-end  
                      install-console
                      banner
{0} ok

  10. Instruct the OpenBoot PROM Monitor to use the nvramrc script.


    {0} ok setenv use-nvramrc? true
use-nvramrc? = true
{0} ok

  11. Power on the second node but do not allow it to boot. If necessary, halt the node to continue with OpenBoot PROM Monitor tasks. The second node is the node that has SCSI address 7.

  12. Verify that the scsi-initiator-id for the host adapter on the second node is set to 7.

    Use the show-disks command to find the paths to the host adapters connected to these enclosures (as in Step 6). Select each host adapter's device tree node, and display the node's properties to confirm that the scsi-initiator-id for each host adapter is set to 7, as shown in the following example.


    {0} ok cd /pci@1f,4000/pci@4/SUNW,isptwo@4
{0} ok .properties
...
scsi-initiator-id        00000007
...
{0} ok cd /pci@1f,4000/pci@2/SUNW,isptwo@4
{0} ok .properties
...
scsi-initiator-id        00000007

  13. Continue with the Solaris operating environment, Sun Cluster software, and volume management software installation tasks.

    For software installation procedures, see the Sun Cluster 3.0 12/01 Software Installation Guide.