Fujitsu ETERNUS DX60 S3 User Manual page 860

Appendix A Parameter List
A.4 Connectivity Management
- REC Transfer Mode
Description
Input condition/
Display contents
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This item is not displayed when the port mode is "CA".
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The REC transfer mode can be changed without suspending a copy session even when an REC is being
performed in the target port. The changed settings are applied immediately to the ETERNUS DX.
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If specific REC transfer modes for all the RA ports and the CA/RA ports are disabled, a copy session with a
disabled REC transfer mode fails because the REC paths for all the RA ports and the CA/RA ports are regarded
as being blocked. When the REC transfer mode for a copy session that is being performed is disabled, this
copy session is halted.
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When "Async Consistency" is disabled for all the RA ports and the CA/RA ports, the REC buffer status changes
to "INACTIVE".
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For normal operations, set the same REC transfer mode for the copy source and the copy destination storage
systems to recover data. If the REC transfer mode is specified for the copy source storage system, the
specified REC transfer mode is used even if the "REC Transfer Mode" is not specified for the copy destination
storage system.
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If the port mode has changed from "RA" to "CA" or changed from "CA/RA" to "CA", the REC transfer mode
returns to the default setting ("Enable"). When the port mode has changed from "RA" to "CA/RA" or changed
from "CA/RA" to "RA", the current REC transfer mode setting is retained. Refer to
(page 459)
Select which REC transfer mode is enabled or disabled for the target port.
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Sync (synchronous transfer mode)
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Async Stack (asynchronous stack mode)
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Async Consistency (asynchronous consistency mode)
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Async Through (asynchronous through mode)
When "Enable" is selected, an REC is performed in the selected transfer mode for the
target port.
When "Disable" is selected, an REC is not performed in the selected transfer mode for
the target port.
To set the REC transfer mode for the specific port, select "Enable" for the appropriate
mode.
For example, specify different ports for Consistency and Stack to perform data
transfers without any interference. The current setting is retained even when an REC
path is changed. When "Enable" is selected for all of the REC transfer modes, a
conventional REC is performed.
This item is displayed only when the Advanced Copy license has been registered.
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Enable
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Disable
for details.
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