Driver Levels Of The Hdlm And Mpio Drivers - Hitachi XP P9500 User Manual

HDLM command
HDLM utility
HDLM manager
HDLM alert driver
HDLM driver
Note:
HDLM programs other than the HDLM GUI are referred to as the HDLM
Core components.

Driver Levels of the HDLM and MPIO Drivers

The HDLM and MPIO drivers are positioned at a higher driver level than the
SCSI drivers. In other words, applications that are accessing LUs in storage
systems will first use the HDLM and MPIO drivers, and then use the SCSI
drivers, in order to access the LUs.
Figure 2-6 Driver Levels of the HDLM and MPIO Drivers on page 2-11
the driver levels of the HDLM and MPIO drivers.
2-10
Program name
HDLM Functions
Hitachi Dynamic Link Manager User Guide (for Windows(R))
• Set up the HDLM operating environment
Provides the dlnkmgr command, which enables you to:
• Manage paths
• Display error information
• Set up the HDLM operating environment
Provides the HDLM utility, which enables you to:
• Collect error information
• Clear persistent reservations
• Register persistent reservation keys
• Check the configuration of the paths
• Check the installation information
• Perform unattended installations of HDLM
• Perform unattended uninstallations of HDLM
Provides the HDLM manager, which enables you to:
• Configure the operating environment
• Request path health checks and automatic failbacks
to be performed
• Collect error log data
Reports the log information collected by the HDLM driver
to the HDLM manager.
Controls all the HDLM functions, manages paths, and
detects errors. The HDLM driver consists of the following:
• Core logic component
Controls the basic functionality of HDLM.
• Filter component
Sends and receives I/O data. The driver name is
hdlmdsm.sys.
Functions
shows