Hitachi Dynamic Link Manager Software Users Guide for Windows (7.6)

Differences in the LU Dynamic Removal Function
Depending on the HDLM version, the LU dynamic removal function differs as
follows:
• In HDLM 05-02, and 5.4
¢
When Remove the LU even if there are Offline(C) paths is not
specified or when the HDLM command dlnkmgr set -rmlu on is
executed
If none of the paths connected to an LU are Online or Offline(C),
the LU will be removed from being an HDLM management-target.
¢
When Remove the LU even if there are Offline(C) paths is
specified or when the HDLM command dlnkmgr set -rmlu on -
force is executed
If none of the paths connected to an LU are Online, the LU will be
removed from being an HDLM management-target.
• In HDLM 5.5 or later
¢
When Remove the LU even if there are Offline(C) paths is not
specified or when the HDLM command dlnkmgr set -rmlu on is
executed
If none of the paths connected to an LU are Online or Offline(C),
the LU will be removed from being an HDLM management-target.
However, if one of the following conditions is satisfied, the LU will not
be removed from being an HDLM management-target:
- When an Offline(E) path connected to the LU satisfies the
conditions to automatically switch to Online. For details about these
conditions, see
Automatic Switching of Paths That Have the Online(E),
Offline(C), or Offline(E) Status on page A-5 in Path Status Transition
and Automatic Path Switching on page A-4.
- When Offline(C) paths are disconnected and changed to
Offline(E) by an online operation, and as a result, no paths are
Online
¢
When Remove the LU even if there are Offline(C) paths is
specified or when the HDLM command dlnkmgr set -rmlu on -
force is executed
If none of the paths connected to an LU are Online, the LU will be
removed from being an HDLM management-target. However, the LU
will not be removed if any Offline(E) or Offline(C) path satisfies
the conditions to automatically switch to Online. For details about
these conditions, see
Automatic Switching of Paths That Have the
Online(E), Offline(C), or Offline(E) Status on page A-5 in Path Status
Transition and Automatic Path Switching on page A-4.
A-6
Functional Differences Between Versions of HDLM
Hitachi Dynamic Link Manager User Guide for Windows
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