Hitachi XP P9500 User Manual page 45

Legend:
Online operation: Online operation performed by executing the dlnkmgr
command's online operation.
Offline operation: Offline operation performed by executing the dlnkmgr
command's offline operation.
#1
When the following conditions are satisfied, a path that has been
determined to have an intermittent error also becomes subject to
automatic failback:
All the paths connected to an LU are Online(E), Offline(E), or
¢
Offline(C).
All the paths connected to an LU have been determined to have an
¢
intermittent error.
The processing of continuous I/O operations issued to an LU is
¢
successful.
#2
When an Online or Offline(E) path exists among the paths that access the
same LU.
If there is only one available online path for an LU, it cannot be placed offline
by executing the offline operation. This ensures that the LU can always be
accessed by at least one path. For details on the offline operation, see
offline (Places Paths Offline) on page
Hitachi Dynamic Link Manager User Guide (for Linux(R))
Figure 2-11 Path Status Transitions
6-5.
HDLM Functions
2-23