Specifications

Escala Tower PL & S, E, T System Hardware
Chapter 2: Models Description 93/94
9es3s1c2.doc
Rev 5.9
02/12/2003
The base of the native HA feature is the RAID 1 software provided by the AIX® mirroring, along with
the double master Ultra Wide SCSI bus. In normal operations, both systems are running their own part
of the application workload. If one of the two systems fails despite all internal RAS protections, thanks
to HA-CMP software, the second system running the other part of the application is able to take over
the workload of the first system.
Note: the PCI SCSI-3 Ultra-Wide RAID Adapter - DPT can't be used for Native HA.
If additional disk space is required, an expansion cabinet can be added to the native HA, providing up
to [2x(6x18)]GB of HA disk capacity.