Connecting Data Hosts to the 2530 Array

C H A P T E R 5

This chapter describes Sun StorageTek 2500 Series Array cable connections for hosts. It contains the following sections:

Connecting Data Hosts to the 2530 Array

Next Steps

Connecting Data Hosts to the 2530 Array

Data transmission between the host and the controllers in the array module is through Serial Attached SCSI (SAS) cables. All connections from the host to the controllers are direct connections. FIGURE 5-1 shows an example of a direct host connection from a single data host with dual HBAs.

Figure showing one data host connected directly to host port 2 of each RAID controller.

FIGURE 5-1 Direct Connection From a Single Host With Dual HBAs

Figure showing a direct connection from a single host with dual HBAs.

FIGURE 5-2 shows an example of direct host connections from two data hosts, each with dual HBAs.

FIGURE 5-2 Direct Connections from Two Data Hosts with Dual HBAs.

Figure showing direct connections from two data hosts with dual HBAs.

FIGURE 5-3 shows an example of direct host connections from three data hosts, each with dual HBAs.

FIGURE 5-3 Direct Connections from Three Data Hosts with Dual HBAs

Figure showing direct connections from three data hosts with dual HBAs.

Note - For maximum hardware redundancy, you must install a minimum of two HBAs in each host. Dual-port HBAs give you two paths into the storage array but do not ensure redundancy if the HBA fails.

Before you connect data hosts directly to the array, check that the following prerequisites have been met:

Interface cables are connected and between the HBAs and the array controllers.

SAS cables (1-, 3-, or 6-meters) are available to connect the controller’s host ports to the data host HBAs.

Each controller module on a controller tray has three SAS host ports (FIGURE 5-4).

FIGURE 5-4 SAS Data Host Ports (on Back of Tray)

Figure showing the SAS data host ports on the back of the tray.

To Connect Data Hosts to a 2530 Array

1. Locate the host ports at the back of the controller tray (FIGURE 5-4).

2. Connect one end of the SAS cable to a host port on a controller module.

Host ports are numbered from left to right: host port 1, host port 2, and host port 3.

3. Connect the other end of each SAS cable to a data host HBA.

4. Repeat these steps for each host-to-controller connection.

Relocation Cautions

Use the following guidelines when relocating trays or drives from one storage array to another.

Caution - Potential data loss - Moving a storage array or array components that are configured as part of a volume group can result in data loss. To prevent data loss, always consult a Customer Support representative before relocating configured drives, controller trays, or drive expansion trays.

Do not move controller trays or drive expansion trays that are part of a volume group configuration. If you must move array components, contact a Customer Support representative for procedures. A Customer Support representative might direct you to complete several tasks prior to undertaking the relocation. These tasks might include:

Creating, saving, and printing an array profile of each storage array that is affected by the relocation of a drive or tray.

Performing a complete backup of all data on the drives that you intend to move.

Verifying that the volume group and each of its associated volumes on the affected storage array have an Optimal status.

Determining the location and status of any global hot spares associated with the affected storage array.

Next Steps

After You Connected The Management And Data Hosts, You Can Power On The Trays, As Described In Chapter 7.