•Enhanced
Adapter Label:
•
•DE Ultra SCSI Adapter (PCI, FC: 6207, Adapter Label:
2.3.2.4 Advantages - Disadvantages
The 7135 RAIDiant Array incorporates the following high availability features:
•Support for
You can run any combination of RAID levels in a single 7135 subsystem. Each LUN can run its own RAID level.
•Multiple Logical Unit (LUN) support
The RAID controller takes up only one SCSI ID on the external bus. The internal disks are grouped into logical units (LUNs). The array will support up to six LUNs, each of which appears to AIX as a single hdisk device. Since each of these LUNs can be configured into separate volume groups, different parts of the subsystem can be logically attached to different systems at any one time.
•Redundant Power Supply
Redundant power supplies provide alternative sources of power. If one supply fails, power is automatically supplied by the other.
•Redundant Cooling
Extra cooling fans are built into the RAIDiant Array to safeguard against fan failure.
•Concurrent Maintenance
Power supplies, cooling fans, and failed disk drives can be replaced without the need to take the array offline or to power it down.
•Optional Second Array Controller
This allows the array subsystem to be configured with no single point of failure. Under the control of the system software, the machine can be configured in Dual Active mode, so that each controller controls the operation of specific sets of drives. In the event of failure of either controller, all I/O activity is switched to the remaining active controller.
In the last few years, the 7133 SSA Subsystems have become more popular than 7135 RAIDiant Systems due to better technology. IBM decided to
