Hitachi Dynamic Link Manager Software Users Guide for Linux

The paths to the primary volume (P-VOL) in an HAM environment have
recovered from an error, but I/O to the P-VOL is suppressed. If an error
occurs in all the paths to a secondary volume (S-VOL), the status of the
P-VOL paths will be automatically changed to the Online status. To
change the status to the Online(D) status, specify the -dfha parameter
for the HDLM command's online operation.
#
The status changes to this status when using HAM (High Availability
Manager).
The Offline Path Status
The offline path statuses are as follows:
• Offline(C)
The status in which I/O cannot be issued because the offline operation
was executed. For details on the offline operation, see
offline (Places
Paths Offline) on page 6-6.
The (C) indicates the command attribute, which indicates that the path
was placed offline by using the command.
• Offline(E)
The status indicating that an I/O could not be issued on a given path,
because an error occurred on the path.
The (E) means error.
Status Transitions of a Path
The following figure shows the status transitions of a path.
HDLM Functions
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Hitachi Dynamic Link Manager (for Linux®) User Guide