HP MPIO Full Featured DSM for P6x00 family of Disk Arrays 4.04.00 Installation and Reference Guide (757324-001, May 2014)

A Software components
This appendix describes the following components of HP MPIO EVA DSM:
• “Drivers”
• “User mode components”
Drivers
The HP MPIO EVA DSM components include the following multipath drivers:
• Microsoft MPIO Framework Drivers
MPIO.SYS is the multipathing bus driver.◦
◦ MPDEV.SYS is the replacement class driver. It communicates with MPIO.SYS.
◦ MPSPFLTR.SYS is a port driver filter (HBA upper filter).
• HP DSM driver
◦ HPEAADSM.SYS is the HP DSM driver for EVA disk arrays. It interacts with MPIO.SYS
to provide device-specific functions.
HP recommends that you do not remove, delete, or disable these drivers while multipath hardware
is attached to your system.
User mode components
The user mode components include:
• “HP MPIO DSM manager GUI
• “HP MPIO EVA DSM command line interface (CLI)”
• “HP MPIO EVA DSM persistent reservations clear utility”
HP MPIO DSM manager GUI
The HP MPIO DSM manager GUI monitors and manages the HP DSMs. It also enables administrator
to receive e-mail notifications on path or device failure events. The HP MPIO DSM Manager is
provided as a separate installation package.
NOTE: To manage HP MPIO EVA DSM 4.04.00 and later, use HP MPIO DSM Manager 4.01.01
or later.
HP MPIO EVA DSM command line interface (CLI)
The HP MPIO EVA DSM command line interface (HPDSM.EXE) enables you to monitor and manage
HP DSMs in an MPIO environment.
HP MPIO EVA DSM persistent reservations clear utility
The HP MPIO EVA DSM persistent reservations clear utility enables you to view and clear
reservations on the disk(s) that are left behind due to incorrect installation or removal of the HP
MPIO EVA DSM or an unsuccessful cluster node failover.
CAUTION: Using this utility incorrectly may result in loss of data and/or incorrect operation of
MSCS/Failover Cluster. HP shall not be liable for problems resulting from the incorrect use of this
utility or for solving them.
The persistent reservations clear utility is located on the HP MPIO EVA DSM installation media,
and gets copied to the HP MPIO EVA DSM installation directory during the installation. You can
24 Software components