Position Of The Hdlm Driver And Hdisk - Hitachi XP P9500 User Manual

HDLM manager
HDLM alert driver
HDLM driver
HDLM configuration log
driver

Position of the HDLM Driver and hdisk

The HDLM driver is positioned above the SCSI driver and is an add-in module
of MPIO driver located in the AIX standard hdisk. Each application on the host
uses the hdisk (logical device file) created by HDLM, to access LUs in the
storage system.
Figure 2-4 Position of the HDLM Driver and hdisk on page 2-8
position of the HDLM driver and hdisk. The logical device file name can be
changed by using the rendev command. In this manual, the file name of a
default logical device of the OS (hdiskn) or an hdisk name is used as the
logical device file name.
Program name
HDLM Functions
Hitachi Dynamic Link Manager User Guide (for AIX(R))
• Change the default value of the hdisk attribute
• Migration of HDLM
• Clear HDLM persistent reservation
• Exclude the hdisk recognized as a boot disk from
being an HDLM management target
• Set ODM to define HDLM operations
• Delete hdisks according to the parameter settings
• Install HDLM
• The unattended installation of HDLM
• Install Hitachi Command Suite Common Agent
Component
• Collect information about errors that occur during
HDLM installation
• Perform maintenance when HDLM-managed devices
are restored
Provides the HDLM manager, which enables you to:
• Configures the HDLM operating environment
• Request path health checks and automatic failbacks
to be performed
• Collects error log data
Reports the log information collected by the HDLM driver
to the HDLM manager. The driver name is dlmadrv.
Controls HDLM functionality, manages paths, and detects
errors. This is an add-in module of the AIX MPIO driver.
The HDLM driver consists of the following:
• Core logic component
Controls the basic functionality of HDLM.
• Filter component
Sends and receives I/O data.
Acquires operation logs of the configuration processing for
the HDLM driver.
Functions
shows the
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