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3 adding a new logical unit – HP Hitachi Dynamic Link Manager Software User Manual

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4. HDLM Operation

292

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.