Chapter 3 Functions of NEC Storage PathManager
[For Windows Server 2003]
C:\>spscmd -getwatcher
Health check : Enable
Request interval : 30 sec
C:\>spscmd -setwatcher :60::
C:\>spscmd -getwatcher
Health check : Enable
Request interval : 60 sec
C:\>
Set only Request interval at 60 seconds
3.6 F
F
ailure avoidance and failure
recovery
3
3
.
.
6
6
Fa
a
i
i
l
l
u
u
r
r
e
e
a
a
v
v
o
o
i
i
d
d
a
a
n
n
c
c
e
e
a
a
n
n
d
d
f
f
a
a
i
i
l
l
u
u
r
r
e
e
r
r
e
e
c
c
o
o
v
v
e
e
r
r
y
y
Failure avoidance and failure recovery are functions that shut down paths in case of path failures, execute
failover so that alternative paths will be used, and execute failback at the time of failure recovery. The
abovementioned path patrol executes failover and failback by using these functions.
3.
.
6.1
F
F
ailover and failback
3
3
.6
6
.
.
1
1
Fa
a
i
i
l
l
o
o
v
v
e
e
r
r
a
a
n
n
d
d
f
f
a
a
i
i
l
l
b
b
a
a
c
c
k
k
When failures occur in the paths, NEC Storage PathManager automatically switches paths to be used from
failed paths to normal paths. This action is referred to as failover. When unavailable paths due to failures
recover from the failures and become available again, NEC Storage PathManager automatically recognizes
this event and adds these recovered paths to the group of available paths. This action is referred to as
failback.
III-20
Summary of Contents for Storage Software PathManager
Page 1: ...NEC Storage Software NEC Storage PathManager User s Manual Windows version IS201 5E...
Page 4: ......
Page 6: ......
Page 7: ...Part I Overv view P Pa ar rt t I I O Ov ve er rvi ie ew w...
Page 13: ...Part II Installation P Pa ar rt t I II I I In ns st ta al ll la at ti io on n...
Page 18: ......
Page 19: ...Part III Functions P Pa ar rt t I II II I F Fu un nc ct ti io on ns s...
Page 47: ...Part IV Operation P Pa ar rt t I IV V O Op pe er ra at ti io on n...
Page 58: ......
