Overview of reconfiguring the hdlm device, Dynamic reconfiguration (dr) for solaris -20, Overview of reconfiguring the hdlm device -20 – HP XP P9500 Storage User Manual
Page 282: Reconfiguring the hdlm device -20
Dynamic Reconfiguration (DR) for Solaris
In Solaris 8 or Solaris 9, you cannot use the Solaris dynamic reconfiguration
(DR) functionality on HBAs that exist on a path managed by HDLM. To add,
delete, or replace such HBAs, you need to restart the host after dynamic
reconfiguration.
Overview of Reconfiguring the HDLM Device
Whether or not the host must be restarted after the reconfiguration depends
on the contents of the reconfiguration. This section describes the
reconfigurations that does and does not require the restarting of the host. It
also gives notes for reconfiguration.
Reconfiguring the HDLM Device
You can change the HDLM device configuration in one of the following two
ways:
•
Restart the host, with the reconfiguration option specified.
Execute the dlmsetconf utility for creating the HDLM driver configuration
definition file to update the HDLM driver configuration definition file (/
kernel/drv/dlmfdrv.conf), and then restart the host, with the
reconfiguration option specified.
•
Use the dlmcfgmgr utility for managing the HDLM configuration, without
restarting the host.
Execute the dlmsetconf utility to update the HDLM driver configuration
definition file (/kernel/drv/dlmfdrv.conf), and then execute the
dlmcfgmgr utility.
Modifying the configuration of the HDLM device without restarting the host
while HDLM is running is called a dynamic reconfiguration of the HDLM
device.
Dynamic reconfiguration of the HDLM device is applicable to the following
operations:
•
Adding a new logical unit (LU)
A new LU is one that has been added to the host, and recognized by the
HDLM driver for the first time. When a new LU is added, the path
connected to that LU is also added.
•
Deleting an existing LU
In Solaris 10 or Solaris 11, if an LU that is managed by HDLM is deleted,
it is also removed from HDLM management.
•
Reconfiguring an LU that is not managed by HDLM, as an HDLM-managed
device
Reconfigure an LU that has already been added to the host, but is not
managed by HDLM, as an HDLM-managed device.
•
Adding a path
Add a path to an existing LU.
4-20
HDLM Operation
Hitachi Dynamic Link Manager User Guide for Solaris
®