Planning Volume 2, Control Workstation and Software Environment

Accessing data across system partitions

In addition to the restrictions on switch traffic, as illustrated in Example 1, data cannot generally be shared across system partitions. Therefore:

• Access to PSSP virtual shared disks and pseudo-tape devices across system partitions is not supported.
• Twin-tailed disks cannot span system partitions.
• A physical file system, that is, the logical volumes containing the files, cannot span system partitions.
• You can use a distributed file system to mount file systems across partition boundaries, just as you would use a distributed file system from one SP to another. Keep in mind that doing this might effect nodes in both partitions in terms of both compute and network utilization.