User guide

DescriptionItem
Values:
• Swap & Freeze: Quick Restores and then immediately saves the data.
Note: Enabling this option with Quick Restore inhibits the update copy operation
and the paired S-VOL (T-VOL for FC Z or FCSE) is not updated.
• Host I/O Performance: Gives weight to I/O response rather than the copy
time. This option controls the copy operation and improves the host I/O
response.
• FC Slower Copy1 (FC Z or FCSE only): Reduces the multiplicity of background
copy into half.
• FC Slower Copy 2 (FC Z or FCSE only): Reduces the multiplicity of background
copy into quarter.
• FC Ext. Slower Copy1: Inhibits background copy and improves host I/O
response when the operating ratio of the MP blade (FC Z or FCSE S-VOL or
T-VOL is allocated) exceeds 65%.
• FC Ext. Slower Copy2: inhibits background copy and improves host I/O
response when the operating ratio of the MP blade (FC Z or FCSE S-VOL or
T-VOL is allocated) exceeds 50%.
• Copy Pace Ext. Slower1
• Copy Pace Ext. Slower2
• Copy Pace Ext. None
Reducing the copy volume in “DUPLEX” status curbs the influence to the I/O
performance of the host server. This item is available to all pairs in “DUPLEX”
status. The I/O performance of the host server is improved in order of Copy
Pace Ext. Slower1, Copy Pace Ext. Slower2,and Copy Pace Ext. None.
Shows whether the option is currently enabled or disabled.Status
Click to enable the selected option.Enable button
Click to disable the selected option.Disable button
Confirm window
112 Fast Snap GUI reference