HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 44)

#4
One of the Offline(E) paths is changed to the Online(E) path.
#5
When an Offline(E) path exists among the paths that access the same LU.
Figure 2-10 Path Status Transitions (P-VOL in HAM environment)
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
Also when an error occurs in all the paths to an S-VOL in the Online(D)
status.
#2
When I/O operations are processed on an S-VOL.
The last available online path for each LU cannot be placed offline by
executing the offline operation. This ensures access to the LU. For details
on the offline operation, see offline (Places Paths Offline) on page 6-6 .
If none of the paths accessing a single LU are in the Online status, one of the
paths will be changed to the Online(E) status.
If you are using automatic failback, when the path recovers from an error,
HDLM automatically places the path online.
2-22
HDLM Functions
Hitachi Dynamic Link Manager (for Solaris) User Guide