Appendix A Parameter List
A.7 Advanced Copy Management
ETERNUS Web GUI User’s Guide (Settings)
Copyright 2015 FUJITSU LIMITED P2X0-1270-13ENZ0
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• Monitoring Time
• HALT Wait Timer
● Advanced Setting
"I/O Priority Mode", "Immediate HALT Mode", and "High Bandwidth Mode" can only be set when setting a
copy operation or host I/O tuning for each REC Buffer. It is not necessary to change the default setting
("Enable") for normal use.
• I/O Priority Mode
Description
Specify the monitoring time, before transition to the " Halt" status for a copy session
when an REC Buffer shortage occurs.
If the REC Buffer is in a high-load state for the specified monitoring time, the copy
session is automatically changed to " Halt" state. When "0 min." is specified in this
field, REC Buffer shortage monitoring is not performed.
If "Unused" is selected for the usage, a "-" (hyphen) is displayed.
Input condition/
Display contents
0 min., 1 min., 2 min., 3 min., 4 min., 5 min., 6 min., 7 min., 8 min., 9 min., 10 min., 11
min., 12 min., 13 min., 14 min., 15 min."-" (hyphen)
Description Specify the maximum non-response time. During the non-response time, the host I/O
response is stopped to give priority to performing REC Buffer transfers in a high-load
state.
If the non-response time exceeds the specified value, response to host I/O is restarted.
However, the copy session is changed to the " Halt" state. When "0 sec." is specified
for this field, the ETERNUS DX gives priority to the host I/O, and the copy session is
immediately changed to " Halt" state.
If "Unused" is selected for the usage, a "-" (hyphen) is displayed.
Input condition/
Display contents
0 sec., 5 sec., 10 sec., 15 sec."-" (hyphen)
Description Select either "Enable" or "Disable" for the "I/O Priority Mode" of the REC Buffer.
If "Unused" is selected for the usage, a "-" (hyphen) is displayed.
"I/O Priority Mode" reduces the effect on host I/O when an initial copy for starting,
restarting, or recovering the copy function is performed.
Input condition/
Display contents
• Enable
• Disable
• "-" (hyphen)
• This mode should only be used by users who want to maintain host I/O performance as much as possible during
REC.
• If "Enable" is selected and host I/O with a high load continues, it may take an extended period of time for the
data to reach an equivalent state. Reduce throughput by as much as possible to avoid exceeding the line
bandwidth of REC during initial copying.
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