HP XP7 Storage - Manual (Page 30)

Program name Functions
• Clear persistent reservations
• Register persistent reservation keys
• Check the configuration of the paths
• Check the installation information
• Perform unattended installations of HDLM
• Perform unattended removals of HDLM
HDLM manager 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
HDLM alert driver Reports the log information collected by the HDLM driver
to the HDLM manager.
HDLM driver 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.
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.
The following figure shows the driver levels of the HDLM and MPIO drivers.
2-10
HDLM Functions
Hitachi Dynamic Link Manager (for Windows®) User Guide