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Chapter 8 Advanced Copy Management
8.1 Advanced Copy Status
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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• Multiplicity
When the local device and the remote device are connected by remote connection, the multiplicity is
displayed. If the "Connection Type" is "Direct", a "-" (hyphen) is displayed.
- Automatic
REC is performed with the recommended multiplicity that is calculated using the procedure in "8.2.17
Measure Round Trip Time" (page 349).
- 1 - 1024
REC is performed with the multiplicity that is manually specified using the procedure in "8.2.18 Modify
REC Multiplicity" (page 351).
• Recommended Multiplicity
When the local device and the remote device are connected by remote connection, the recommended
multiplicity is displayed. If the "Connection Type" is "Direct", a "-" (hyphen) is displayed.
- 0
The factory default setting.
- 1 - 1024
The recommended multiplicity that is calculated using the procedure in "8.2.17 Measure Round Trip
Time" (page 349).
- ***
The recommended multiplicity is not measured using the procedure in "8.2.17 Measure Round Trip
Time" (page 349).
• Link Speed
When the local device and the remote device are connected by remote connection, the link speed is
displayed between 1 Mbit/s - 65535 Mbit/s. If the "Connection Type" is "Direct", a "-" (hyphen) is displayed.
8.1.6.3 REC Buffer
This function displays the REC Buffer status when performing REC in "REC asynchronous consistency mode".
The "Consistency mode" secures the order of data transfer to the remote device for all of the specified REC
sessions. This mode requires constant securement of the dedicated REC Buffer in the cache memory. Copying
via REC Buffer stores multiple REC session I/Os in the REC Buffer for a certain period of time, and copies in
blocks.
Check if the REC Buffer capacity of the copy source and that of the copy destination are the same size.
If the capacities are not the same, configure the settings, using the procedure in "8.2.19 Modify REC Buffer"
(page 354) function, so that the REC Buffer capacity of the copy source and that of the copy destination
become the same size.