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Chapter 3 Notes
71
3
3
3
.
.
.
2
2
2
F
F
F
i
i
i
l
l
l
e
e
e
S
S
S
y
y
y
s
s
s
t
t
t
e
e
e
m
m
m
S
S
S
e
e
e
l
l
l
e
e
e
c
c
c
t
t
t
i
i
i
o
o
o
n
n
n
You can configure a file system for the target MV and RV volumes for replication operations. In
addition, these volumes may be used as RAW devices for ORACLE, etc. The target MV and RV
paired for replication operations must have the same type of partitions and file systems. If these rules
are not observed, data consistency is not guaranteed.
3
3
3
.
.
.
3
3
3
W
W
W
i
i
i
n
n
n
d
d
d
o
o
o
w
w
w
s
s
s
S
S
S
y
y
y
s
s
s
t
t
t
e
e
e
m
m
m
S
S
S
e
e
e
l
l
l
e
e
e
c
c
c
t
t
t
i
i
i
o
o
o
n
n
n
As business servers and backup servers using each of MV and RV volume, Windows 2000 servers and
Windows Server 2003 servers cannot be used together. Use the MV and RV volumes from the same
Windows operating system. If the MV and RV volumes are used from different Windows operating
systems, data consistency cannot be guaranteed.
3
3
3
.
.
.
4
4
4
D
D
D
i
i
i
s
s
s
k
k
k
S
S
S
i
i
i
g
g
g
n
n
n
a
a
a
t
t
t
u
u
u
r
r
r
e
e
e
s
s
s
A disk signature is the disk identifier that is written in the header block of the disk when it is referenced
for the first time by [Disk Management] (Windows). The Windows system does not allow using two
or more disks with the same signature in the same system.
For a volume in the Windows system (OS type “WN” or “A2”), the data replication function restores
the original identifier before copying so that the MV and RV do not have the same identifier when
separating the pair.
3
3
3
.
.
.
5
5
5
C
C
C
o
o
o
p
p
p
y
y
y
C
C
C
o
o
o
n
n
n
t
t
t
r
r
r
o
o
o
l
l
l
S
S
S
t
t
t
a
a
a
t
t
t
e
e
e
S
S
S
e
e
e
l
l
l
e
e
e
c
c
c
t
t
t
i
i
i
o
o
o
n
n
n
There are three copy control states available when executing Replicate or Restore. When applying data
replication to the backup system, it is necessary to take backup by Separate and immediately resolve the
difference between MV and RV when re-synchronizing. For that purpose, select Sync mode.
When Restore with RV protection specified is executed, the updated data of the MV is not reflected into
the RV. Therefore, copy control by using Foreground Copy (Sync Mode or Semi Sync Mode) and
Background Copy has no effect.
There are the following copy control states as shown in Table 3-2.