Hitachi Dynamic Link Manager Software Users Guide for Linux

The HAL daemon detects hardware configuration changes, for
example, when a USB device or CD-ROM is inserted.
• If you execute the dlmcfgmgr utility with the -v parameter specified, a
hyphen (-) might be displayed in the Device column as shown below:
# dlmcfgmgr -v
HDevName Management Device Host Channel Target Lun
/dev/sddlmaa configured /dev/sdd 3 0 0 0
/dev/sdk 3 0 1 0
/dev/sdr 4 0 0 0
- 4 0 1 0
KAPL10302-I /sbin/dlmcfgmgr completed normally.
This state might be caused by the following operations:
¢
Restarting the host when the paths are disconnected
¢
Restarting the host after deleting an LU
¢
Restarting the host after changing the fiber cable connection
¢
Restarting the host after changing the zone settings for the fibre
channel switch
When using SUSE LINUX Enterprise Server 11, this state might also be
caused if one of the following problems occurs while the system is
running:
¢
A path gets disconnected.
¢
An LU is deleted.
¢
A fiber cable connection is changed.
¢
A Fibre Channel switch's zone setting is changed.
If you want to delete the path whose status is indicated by a hyphen (-),
execute the dlmcfgmgr utility with the -u parameter specified.
For details on this utility, see
dlmcfgmgr Utility for Managing the HDLM
Configuration on page 7-22.
• If you deallocate an existing LU and then allocate a new LU to the path
that was used by the deallocated LU, the HDLM device that is allocated to
the LU is also changed. In this case, the HDLM device that had been
allocated to the deallocated LU is deleted and a new HDLM device is
allocated to the new LU.
Also, if you replace an existing storage system by a new storage system,
a new HDLM device is allocated to each LU in the storage system even if
the LU configuration of the new storage system is the same as the LU
configuration of the replaced storage system.
4-58
HDLM Operation
Hitachi Dynamic Link Manager (for Linux®) User Guide