HP Hitachi Dynamic Link Manager Software - Manual (Page 314)

4. HDLM Operation
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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 newly added path in HDLM,
execute the
dlmsetconf
utility and then restart the host, with the reconfiguration
option specified.
„ In Solaris 10, you can delete HDLM devices without restarting the host. However,
if you cannot stop all of the programs that are using the HDLM devices that you
want to delete or you cannot remove the mapping between the internal LUs and
the storage port LUNs by performing operations on the storage system, you must
restart the host to delete the HDLM devices.
4.5.3 Adding a New Logical Unit
This section describes the operations for configuring a new LU recognized by the host,
as an HDLM-managed device.
In a Solaris 8 version1/01 or later, Solaris 9, or Solaris 10 environment that supports
dynamic reconfiguration of HDLM devices, you can modify settings so that new LUs
are recognized automatically by the HDLM driver without restarting the host. In this
case, you need to use the
dlmcfgmgr
utility for managing the HDLM configuration in
order to have the HDLM driver recognize the contents of the HDLM driver
configuration definition file (
/kernel/drv/dlmfdrv.conf
) without having to
restart the host. For details on the
dlmcfgmgr
utility, see 7.3 The dlmcfgmgr Utility
for Managing the HDLM Configuration.
(1) Notes
The following describes the notes on adding new LUs:
• If you do not want to configure an LU that was newly added to the host, as an
HDLM managed device, first set the LU as a non-HDLM-managed device, and
then execute the
dlmcfgmgr
utility. If the newly added LU is set as a
non-HDLM-managed device, reconfiguration of the LU for the HDLM driver
will not be performed.
• You cannot perform dynamic reconfiguration when you add a new LU to HDLM
and an existing instance number is allocated to the path of the LU. In such a case,
restart the host.