Hitachi XP P9500 User Manual page 436

You can specify one or more logical device file names of an HDLM device
(/dev/sddlm[aa-pap]) as a value of the -u parameter. For details on
logical device files for HDLM devices, see
Devices on page
parameter value cases an error.
If all the HDLM devices are the target, specify all. Specifying all
together with a logical device file name of an HDLM device causes an
error. If you specify the logical device file name for an HDLM device that
does not exist or a non-HDLM device, the specification is ignored.
The dlmcfgmgr utility with this parameter can be executed a number of
times while Linux is running. The re-configured HDLM device becomes
available immediately after execution of the utility.
You can use this parameter to delete information about HDLM device
paths for which a compatible SCSI device does not exist (paths displayed
as hyphens (-) in the Device column of the HDLM device configuration
information that is displayed by specifying the -v parameter), and to
release the registration of the path from HDLM.
In general, the path information for the HDLM device is added at HDLM
startup time once it is recognized. Even if the recognized HDLM device is
not available because this path is disconnected or the LU is deallocated,
the path information for the unavailable HDLM device will not be deleted
automatically. Because the unused HDLM device path information is
preserved, newly defined LUs and added paths cannot be used in some
cases. This parameter is useful to eliminate such a problem.
If you specify this parameter with all, an HDLM device, which was simply
disconnected at host boot time but is currently being used, might be
assumed to be deleted. Before executing the dlmcfgmgr utility with this
parameter set to a value of all, check the status of the HDLM device to
be deleted by executing this utility with the -v parameter.
-logfs [dlmcfgmgr-utility-log-file-size]
Use this parameter to change the size of the dlmcfgmgr utility log file
(dlmcfgmgr[1-2].log).
For dlmcfgmgr-utility-log-file-size, specify a value in the range from 1024
to 999999 (in KB).
If the number of LUs to be managed by HDLM is 65 or more or the
number of paths to be managed by HDLM is 129 or more, we recommend
that you specify a value of 10240 KB or more.
When you change the log file size, the size of the current
dlmcfgmgr[1-2].log file is not changed. The next dlmcfgmgr[1-2].log
file will be created with the specified file size.
If you do not specify the log file size for the dlmcfgmgr utility, the current
setting is displayed.
Examples
Example 1:
To register the path that HDLM has not identified, by confirming the
execution of the utility:
7-26
2-11. Specifying the -u parameter without the
Utility Reference
Hitachi Dynamic Link Manager User Guide (for Linux(R))
Logical Device Files for HDLM