3.6.1 HP PolyServe Matrix Server Administration Guide (T5392-96018, August 2008)

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Configure PSFS Filesystems
PolyServe Matrix Server provides the PSFS filesystem. This direct-access
shared filesystem enables multiple servers to concurrently read and write
data stored on shared SAN storage devices. A journaling filesystem, PSFS
provides live crash recovery.
Overview
Filesystem Features
Concurrent Access by Multiple Servers
After a PSFS filesystem has been created, all matrix servers having access
to the device via the SAN can mount the filesystem and subsequently
perform concurrent read and/or write operations to that filesystem. A
PSFS filesystem must be consistently mounted either read-only or read-
write across the matrix.
Standard Filesystem Operations and Semantics
The PSFS filesystem is a standard Windows filesystem and supports
standard filesystem operations such as assigning or de-assigning drive
letters. These operations can be performed across the cluster with the
PolyServe Management Console or from the command line.
The PSFS filesystem also supports existing applications. It uses standard
read/write semantics and does not require any changes to applications.