Notes On Creating An Hdlm Environment; Notes On Hardware Settings - Hitachi XP P9500 User Manual

Notes on Creating an HDLM Environment

This section gives points to be noted when creating an HDLM environment.
For points to be noted during operation of HDLM, see
on page

Notes on Hardware Settings

For details on the settings of the storage system, see storage system manual
and maintenance documentation for the storage system.
• When using HBAs that can set up a binding between target IDs and
storage-system ports, you must set up the binding before installing
HDLM. For details, see the Release Notes and the HBA documentation.
• Do not change the vendor ID or product ID of a storage system. If you
do, HDLM will not be able to recognize the storage system.
• The I/O timeout value reported to the sd or ssd driver depends on the
timeout values for the switch and HBA.
• Depending on the switch and the HBA timeout value that is set, a timeout
for I/O might take considerable time. Accordingly, switching a path or
detecting a path error may take some time. Even the path health
checking function may take longer than the checking interval set for
detecting path errors.
• Make sure that all HBAs that are on a single host and connected to HDLM-
managed devices are of the same type, and have the same HBA driver
version, the same firmware, and the same FCode. If you using more than
one type of HBA, paths will not be able to be switched when an error
occurs.
• When you change the status of FCode on the HBA or FCode version, the
physical path name of the sd or ssd device that HDLM manages might be
changed. When you change the status of FCode after HDLM is installed,
make sure that the physical path names of HDLM-managed devices have
not changed. If the physical path name has changed, execute the
dlmsetconf utility for creating the HDLM driver configuration definition
file, and then restart the host with the reconfiguration option specified.
In addition, when you use VxVM and remove the devices from VxVM
control, make sure that the physical path names configured in the
settings file (/etc/vx/vxvm.exclude) that is used to remove from VxVM
control have not been changed. If a physical path name has been
changed, re-set the physical path name. For details on the procedure for
removing the devices from VxVM control, see
VxVM on page
• When using Fibre Channel, make sure that the target IDs of the SCSI
comply with the HBA settings. To determine the target IDs, refer to the
HBA documentation.
4-2.
3-140.
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide (for Solaris(R))
Notes on Using HDLM
Removing Devices from
3-35