4.1.0 HP PolyServe Matrix Server administration guide (T5392-96073, October 2010)

psd. Provides cluster-wide consistent device names among all servers.
psv. Used by the Matrix Server Volume Manager, which creates, extends, recreates,
or destroys dynamic volumes.
Shared SAN devices
Before a SAN disk can be used, the disk will need to be imported into the cluster.
This step gives Matrix Server complete and exclusive control over access to the disk.
During the import, the disk is given a unique global device name. The servers in the
cluster use this name when they need to access the disk.
Volume Manager
The Volume Manager can be used to create dynamic volumes consisting of disk
partitions that have been imported into the cluster. Dynamic volumes can be configured
to use either concatenation or striping. A single PSFS filesystem can be placed on a
dynamic volume.
The Volume Manager can also be used to extend a dynamic volume and the filesystem
located on that volume. Other Volume Manager operations include recreating or
destroying a volume.
PSFS filesystems
PSFS filesystems can be created on either basic volumes or dynamic volumes. A basic
volume is a single disk, disk partition, or LUN imported into the cluster. Dynamic
volumes consist of one or more imported disks, disk partitions, or LUNs and are
created by the Volume Manager.
The PSFS filesystem provides the following features:
• Concurrent access by multiple servers. After a filesystem has been created on a
shared disk, all servers having physical access to the device via the SAN can
mount the filesystem.
• Support for standard filesystem operations such as assigning or deassigning drive
letters. These operations can be performed either with the PolyServe Management
Console or from the command line.
• Support for existing applications. The PSFS filesystem uses standard read/write
semantics and does not require changes to applications.
• Disk quotas for users, including both hard and soft limits.
Introduction to Matrix Server22