HP Hitachi Dynamic Link Manager Software - Manual (Page 57)

2. HDLM Functions
33
Offline operation: Offline operation performed in the Path Management window
or by executing the
dlnkmgr
command's
offline
operation.
#1
During reserve processing for an LU, the Online status is temporarily changed to
Online(P)
. When the reservation processing finishes, the
Online(P)
status is
changed to
Offline(C)
.
#2
When the following conditions are satisfied, the connected
Offline(C)
paths
are automatically placed online:
• All the online paths are
Online(E)
and all the SCSI devices connected to
the
Online(E)
paths have been deleted.
• SCSI devices are connected and all the
Offline(E)
paths are subject to
automatic failback.
• SCSI devices are connected to the
Offline(C)
paths.
#3
When a path is added dynamically, initially the path status is
Offline(C)
. The
path status will then automatically change to
Online
. For details on dynamically
adding a path, see 4.7.1 Setting Up an Added LU and Path as an HDLM
Management-target.
#4
When the following conditions are all 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.
#5
During reserve processing for an LU, the
Offline(E)
status is temporarily
changed to
Offline(P)
. After the reserve processing finishes, the
Offline(P)
status is changed to
Offline(C)
.
#6
When the following conditions are satisfied, the connected
Offline(E)
paths
are automatically placed online:
• All the online paths are
Online(E)
and all the SCSI devices connected to