Operational Differences For Replication Commands - Hitachi VSP F1500 User And Reference Manual

Operational differences for replication commands

The following table shows the differences between open volumes and
mainframe volumes in replication commands. For details on the differences,
see the manual for each program product.
Command Option
paircreate* -c <size>
-m grp
[CTG ID]
pairsplit -r
-rw
*If the capacity of the S-VOL is larger than that of the P-VOL, you cannot create a pair with CCI. To
create a TrueCopy for Mainframe pair with volumes that differ in capacity, use Business Continuity
Manager or Storage Navigator.
Notes:
• A mainframe primary volume can also be called a source volume or a main volume.
• A mainframe secondary volume can also be called a target volume or a remote volume.
Table 3-15 Differences in replication commands
Operation in
Description
open systems
Specifies track TrueCopy:
size when
You can specify
copying.
1 to 15 tracks.
If CTG ID is not You can specify
specified, CTG this option.
ID is
automatically
assigned and a
pair is
registered to the
consistency
group. If CTG ID
is specified, a
pair is
registered to the
CTG ID in use.
Specifies access -r: Read only
mode to S-VOL
-rw: Read/
after splitting a
write enabled
pair.
CCI functions
Command Control Interface User and Reference Guide
Operation in
mainframe
systems
TrueCopy for This option is not
Mainframe: supported in Universal
Replicator or Universal
3 or 15 tracks
Replicator for
When you specify
Mainframe.
the number 1 to 3,
There is no difference
the copy speed is
between ShadowImage
3 tracks.
and ShadowImage for
When you specify
Mainframe.
the number 4 to
15, the copy
speed is 15 tracks.
You can specify ShadowImage pairs and
this option. ShadowImage for
Mainframe pairs cannot
be registered to the
same CTG ID. If both
ShadowImage pairs and
ShadowImage for
Mainframe pairs are
registered to one
group, the command
ends abnormally.
The volume This option is only for
cannot be read TrueCopy, TrueCopy for
regardless of the Mainframe, Universal
specified options. Replicator, and
Universal Replicator for
Mainframe.
You cannot specify this
option in ShadowImage
or ShadowImage for
Mainframe.
Notes
3-53