HP Hitachi Dynamic Link Manager Software - Manual (Page 489)

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Reference information
If you do not specify a parameter, the syntax of the dlmcfgmgr utility is
displayed.
# /sbin/dlmcfgmgr
KAPL10319-W usage: /sbin/dlmcfgmgr [-s]
{ -r
| -o {special-file-name ... | all}
| -i {special-file-name ... | all}
| -v [-udev]
| -u {special-file-name ... | all}
| -logfs [log-file-size]}
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Notes
• When an LDEV is allocated to a path and then another LDEV is allocated
to the same path (host port number, bus number, target ID, and host LU
number), the HDLM device name for the new LDEV might sometimes be
the same as that for the old LDEV. For example, when an LDEV is
deallocated while a host is running, another LDEV can be allocated to the
same path. In this case, if an application preserves the settings to use
that HDLM device name, a program such as a higher-level program
product of HDLM accesses that HDLM device without recognizing that the
LDEV was changed. This might result in data corruption. Check that the
HDLM device name you previously used is nowhere to be found before
deallocating the LDEV.
• You cannot execute multiple instances of the dlmcfgmgr utility at the
same time.
• You cannot execute the dlmcfgmgr utility while the dlmstart utility is
executing.
• A logical device file name of the HDLM device file that can be specified
with the -i, -o, or -u parameter of the dlmcfgmgr utility can consist of up
to 4,095 characters. If a name is more than 4,096 characters long, the
error message KAPL10358-E is displayed.
• If an LU is allocated and another LU is reallocated using the same host LU
number, HDLM does not handle them as different LUs. Therefore, restart
the host whenever a configuration change is made.
• When two or more HDLM devices are specified with the -s parameter, the
confirmation message is not displayed each time the processing for each
HDLM device is executed. For example, when this utility executes an
operation specified with the -o parameter for /dev/sddlmaa, /dev/
sddlmab, and /dev/sddlmac, the confirmation message KAPL10339-I is
not displayed for the processing of each device. This message is displayed
once at the beginning of the operation. If you enter y, the processing for
Utility Reference
7-29
Hitachi Dynamic Link Manager User Guide for Linux ®