IBM DS3200 Storage Subsystem manual Controllers

Attention:

1.After you remove a drive from a bay, wait 70 seconds to allow the drive to spin down before you replace or reseat the drive . Failure to do so might cause unpredictable results.

2.Never hot-swap a drive when its associated green activity LED is flashing or its associated amber fault LED is flashing. Hot-swap a drive only when its associated amber fault LED is lit continuously or when the drive is inactive and its associated green activity LED is not flashing.

Note: If the hard disk drive that you want to remove is not in a failed or bypass state, always use the Storage Manager software either to place the drive in a failed state or to place the array that is associated with the drive (or drives) in an offline state before you remove the drive from the enclosure.

Controllers

The DS3200 has one or two hot-swappable and redundant RAID controllers. The controllers are at the rear of the storage subsystem. The left controller is controller A, and the right controller is controller B. When the DS3200 has two controllers, one controller will continue to operate if the other controller fails.

The controllers contain the storage subsystem control logic, interface ports, and LEDs. A single-controller model comes with one SAS host port and can support two additional SAS host ports through an optional SAS host port adapter, which provides three SAS host ports on the controller.

A dual-controller model comes with one SAS host port on each controller; each controller can support two additional SAS host ports through an optional SAS host port adapter, which provides three SAS host ports on each controller.

Each controller has one SAS drive expansion port for connecting to the DS3000 storage expansion enclosures and one Ethernet port for DS3200 subsystem management purposes. See Figure 13 on page 23 and Figure 23 on page 35.

Attention: When a DS3200 has two controllers, the controllers must be identical to each other in hardware (part number, DIMM size) and firmware. If you install a SAS host port adapter in either controller, you must install an identical SAS host port adapter in the other controller.

The storage management software automatically sets the enclosure ID number for the controllers. You can change the enclosure ID setting through the DS3000 storage management software only. There are no switches on the DS3200 chassis to manually set the enclosure ID. Both controller enclosure ID numbers are identical under normal operating conditions.

Chapter 1. Introduction 9