High availability requires the following hardware and system components:
A Microsoft certified cluster. See your Microsoft documentation for a description of what constitutes a certified cluster
Windows 2008 R2
The operating system and cluster server software are installed on both nodes, residing on local disk storage with the same path on both nodes (for example, C:\WINNT and C:\WINNT\Cluster). See your Microsoft documentation for a description of what constitutes a certified cluster.
Adaptive Server 64-bit software installed on both cluster nodes, with the Sybase release directory (%SYBASE%) residing on local disk storage on the nodes (rather than shared disk storage).
Sybase data devices on shared disk drives.
Both Adaptive Servers must have an independent shared disk (or set of shared disks) for their data device storage. This area of shared disk stores all the companion database device files. Each companion can use only its own area of shared disk for its data devices.
You must install Adaptive Server on the same hard drive letter and path on all cluster nodes. For example, if you use C:\Sybase as the installation directory on the first node, you must also use C:\Sybase on the second node.
This section discusses how to prepare Adaptive Server for a high availability configuration.
