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Chapter 8 Advanced Copy Management
8.2 Functions in the Action Area for Advanced Copy
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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• Immediate HALT Mode
Select either "Enable" or "Disable" for the "Immediate HALT Mode" of the REC Buffer.
If "Unused" is selected for the usage, "-" (hyphen) is displayed.
"Immediate HALT Mode" reduces the effect on host I/O because of the insufficient of REC Buffer
when "HALT Wait Timer" is set to "0 sec.". Enable this item when the response to host I/O is reduced
even if "0 sec." is selected for the "HALT Wait Timer".
→ A confirmation screen appears.
• 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.
• This mode should only be used by users who want to maintain host I/O performance as much
as possible during REC.
• Items that are set for this mode are only applied when "0 sec." is selected for "HALT Wait Timer".
• When "Enable" is selected, the ETERNUS DX Disk storage system changes the sessions using the
target REC Buffers to "Halt" if the capacity of a REC Buffer is insufficient. If this occurs, the initial
copy starts every time when recovering from the "Halt" status and the time required for the
order of data transfers cannot be guaranteed, resulting in this process taking an extended
period of time.