Registering rcus to the connected mcu – HP StorageWorks XP Remote Web Console Software User Manual
Page 73
For round-trip time between the MCU and RCU, contact your carrier or use the ping command
and measure the time. If there are no communications lines between the MCU and RCU, specify
1.
Initial copy response time is the response time required for multiple initial copy operations. Use
the following formula to calculate the initial copy response time:
Initial copy response time (ms) = (1[MB] / speed of the line between the MCU and RCU[MB/ms]
1
)
x (initial copy pace
2
/ 15)
x (max number of initial copy VOLs
3
/ number of MCU-RCU communications lines)
4
1
If there are no communications lines between the MCU and RCU, specify 0.17[MB/ms] for speed of the line between
the MCU and RCU.
2
For the value of initial copy pace, see
3
For max number of initial copy VOLs, see
. The default is 64.
4
If max number of initial copy VOLs / number of MCU-RCU communication lines is larger than 16, specify 16 for max
number of initial copy VOLs / number of MCU-RCU communications lines.
Table 24 Initial copy pace for calculating initial copy response time
Perform initial copy and update copy at one
time
Perform initial copy
only
Initial copy pace
specified at time of
pair creation is 9 to 15
Initial copy pace
specified at time of
pair creation is 1 to 8
8
Initial copy pace
specified when pair
was created
Initial copy pace
specified when pair
was created
XP RAID Manager
Operation
8
Initial copy pace
specified when pair
was created
Initial copy pace
specified when pair
was created
XP Command View
Advanced Edition or
XP Remote Web
Console
Table 25 Example settings
Round trip time
specified [ms]
Maximum
number of
initial copy
VOLs
Initial copy
pace
Number of lines
between
MCU/RCU
Line speed
between
MCU/RCU
[MB/ms]
Round trip time
[ms]
Item No.
160
64
15
4
0.1
0
1
220
64
15
4
0.1
30
2
360
64
15
4
0.1
100
3
Registering RCUs to the connected MCU
1.
Ensure that remote copy connections and MCU ports are properly configured. Get the S/N
of the RCU and the SSIDs for the CU image in the RCU. The register RCU operation fails
without this information. The disk array should have a label or tag indicating its S/N and
SSIDs. The HP representative can also get the RCU S/N and SSIDs using the RCU's service
processor (at the remote site).
2.
In the RCU Operation pane, click MCU&RCU in the Switch Display box.
3.
In the CU number/Port tree, click the correct CU image. For this step, the list can be blank.
You must register and add RCUs to each CU image separately.
4.
In the MCU/RCU list, right-click. For registering RCU operations, the RCU does not have to
be selected on the list.
RCU operations
73