HP XP P9500 Storage - Manual (Page 283)

The following operations are not supported in the dynamic reconfiguration of
the HDLM device. To enable the following operations, restart the host with
the reconfiguration option specified.
• Re-adding and deleting an existing LU (in Solaris 8 or Solaris 9)
• Changing the setting of an existing LU
• Deleting a path to an existing LU
• Reconfiguring an existing LU (an HDLM-managed device), as a non-
HDLM-managed device
• Adding and replacing hardware (including HBA and switches)
• Placing the following under HDLM management: LUs and paths recognized
by a host through an HBA port not used by HDLM.
• Changing the default controller for the LU of the storage system #
#
Specifying the reconfiguration option is not required.
For details on the dlmsetconf utility, see The dlmsetconf Utility for Creating
the HDLM Driver Configuration Definition File on page 7-23 .
For details on the dlmcfgmgr utility, see The dlmcfgmgr Utility for Managing
the HDLM Configuration on page 7-16 .
Notes on Reconfiguring the HDLM Device
The following describes the notes on reconfiguring the HDLM device:
• Dynamic reconfiguration of HDLM devices can only be performed for
Solaris 8 version 1/01 or later, Solaris 9, Solaris 10, or Solaris 11.
• When adding a new LU, since the HBA driver and either the sd or ssd
driver recognize the reconfiguration, you may need to restart the host,
depending on the following conditions:
¢
What kind of HBA and HBA driver are used
¢
The configuration for a newly-added LU
For details, refer to the documentation for the HBA driver being used.
• When the HBA used for accessing an HDLM-managed LU is removed or
replaced, processing to unconfigure or reconfigure the HBA driver and
either the sd or ssd driver might not complete until the host is restarted.
• When you modify disk device configurations (such as deleting or
removing LUs in Solaris 8 or 9), or server-side hardware configurations,
execute the dlmsetconf utility, and then restart the host, with the
reconfiguration option specified. Also, when the hardware supports
dynamic reconfiguration for the disk and you want to dynamically add
new LUs, execute the dlmsetconf utility, and then execute the dlmcfgmgr
utility for managing the HDLM configuration.
• Without restarting the system, when you add a new path to the LU that
HDLM manages, the logical device file of the sd or ssd device
corresponding to the path will not be created. When you want to use the
HDLM Operation
4-21
Hitachi Dynamic Link Manager User Guide for Solaris ®