Use the Viewing FlashCopy® Mapping Details panel in the SAN Volume Controller Console to view information that is associated with a specific FlashCopy mapping.
Attributes
The following attributes are displayed in the table:
- ID
- Displays the system-assigned ID for the FlashCopy mapping.
- Name
- Displays the name of the FlashCopy mapping.
- State
- Displays the current state of the FlashCopy mapping. The state can be one of the following values:
- Idle or Copied
- Indicates that the source and target VDisks act as independent VDisks even if a FlashCopy mapping exists between the two. Read and write caching is enabled for both the source and the target.
- Preparing
- Indicates that any changed write data for the source VDisk is flushed from the cache. Any read or write data for the target VDisk is discarded from the cache.
- Prepared
- Indicates that the mapping is ready to be started. While in this state, the target VDisk is offline.
- Copying
- Indicates that the copy is in progress.
- Stopping
- Indicates that the copy is in the stopping state.
- Stopped
- Indicates that the mapping has been stopped because either you issued a command or an input/output (I/O) error occurred. The copy can be restarted by preparing and starting the mapping again.
- Suspended
- Indicates that the mapping was started but did not complete. The source VDisk might be unavailable, or the copy bitmap might be offline. If the mapping does not return to the copying state, stop the mapping to reset the mapping.
- Source VDisk ID
- Displays the system-assigned ID for the source virtual disk that is used in this FlashCopy mapping.
- Source VDisk Name
- Displays the name of the source virtual disk in this FlashCopy mapping.
- Target VDisk ID
- Displays the system-assigned ID for the target virtual disk that is used in this FlashCopy mapping.
- Target VDisk Name
- Displays the name of the target virtual disk in this FlashCopy mapping.
- Consistency Group ID
- Displays the system-assigned ID for the FlashCopy consistency group that contains this FlashCopy mapping.
- Partner
- Displays the name of the partner FlashCopy mapping associated
with this FlashCopy mapping. A partner FlashCopy mapping is a mapping
which consists of the same VDisk, but the source and target VDisks
are reversed. For example, if one mapping contains vdisk1 and vdisk2,
where vdisk1 is the source and vdisk2 is the target, then its partner
mapping consists of vdisk2 as the source and vdisk1 as the target.
- Consistency Group Name
- Displays the name of the FlashCopy consistency group that contains this FlashCopy mapping.
- Progress (%)
- Displays the progress of the copy operation as a completion percentage 0% - 100%.
- Cleaning Progress (%)
- Displays the progress of the FlashCopy mapping cleaning operation if one is in process. The value is shown as a completion percentage of 0% - 100%. The cleaning process must complete before the FlashCopy mapping moves to the stopping state.
- Copy Rate
- Displays the copy rate for the FlashCopy mapping. The value can be either a number from 1 - 100 or NOCOPY. NOCOPY indicates the copy operation is disabled. The default value is 50 (2 MB per second).
The following table shows the relationship of
the copy and cleaning rate value to the attempted number of grains
to be split per second. A grain is the unit of data represented by
a single bit.
Table 1. Relationship between the rate,
data rate and grains per second values| User-specified rate attribute value |
Data copied/sec |
256 KB grains/sec |
64 KB grains/sec |
|---|
| 1 - 10 |
128 KB |
0.5 |
2 |
| 11 - 20 |
256 KB |
1 |
4 |
| 21 - 30 |
512 KB |
2 |
8 |
| 31 - 40 |
1 MB |
4 |
16 |
| 41 - 50 |
2 MB |
8 |
32 |
| 51 - 60 |
4 MB |
16 |
64 |
| 61 - 70 |
8 MB |
32 |
128 |
| 71 - 80 |
16 MB |
64 |
256 |
| 81 - 90 |
32 MB |
128 |
512 |
| 91 - 100 |
64 MB |
256 |
1024 |
The data copied per second and the
grains per second numbers represent standards that the SAN Volume
Controller tries to achieve. The SAN Volume Controller is unable to
achieve these standards if insufficient bandwidth is available from
the nodes to the physical disks that make up the managed disks (MDisks)
after taking into account the requirements of foreground I/O. If this
situation occurs, background copy I/O contends for resources on an
equal basis with I/O that arrives from hosts. Both tend to see an
increase in latency and consequential reduction in throughput with
respect to the situation had the bandwidth not been limited.
- Cleaning Rate
- Displays the current cleaning rate for this mapping. The value NOCLEAN is the lowest rate and 100 is the highest. This clean rate is used to minimize the amount of time that a mapping is in the stopping state. See Table 1 for details.
- Start Time
- Displays the last time that the copy was started. The value is displayed in the format YYMMDDHHMMSS.
- YY = Year
- MM = Month
- DD = Day
- HH = Hour
- MM = Minutes
- SS = Seconds
If the copy has never been started, a blank line is displayed in the table.
- Dependent Mappings
- Displays the number of mappings that are dependent on this FlashCopy mapping.
- Restore
- Indicates whether the FlashCopy mapping is being used to restore
data. The following values are possible:
- Yes
- Indicates that the FlashCopy mapping is restoring
data to the target VDisk, which is an active source VDisk of another
FlashCopy mapping.
- No
- Indicates that either the restore option was not specified when
the FlashCopy mappings was prepared or started or that the conditions
that required the restore option to be specified no longer exist.
- Automatically Delete
- Indicates whether a FlashCopy mapping is deleted when it is done copying. The following values are valid:
- Enabled
- Indicates that the cluster supports the automatic deletion of FlashCopy mapping when it is done copying.
- Disabled
- The cluster supports the automatic deletion of FlashCopy mapping when it is done copying; however, the function is turned off.
- Not Supported
- Indicates that the cluster does not have the capability to support the automatic deletion of FlashCopy mapping.
- Incremental
- Displays whether the FlashCopy is incremental FlashCopy. The following values are valid:
- No
- Indicates that the FlashCopy mapping is not incremental.
- Yes
- Indicates that the FlashCopy mapping is incremental.
- Difference
- Indicates the percentage of grains in an incremental mapping which will need to be copied the next time that the mapping is started. For non-incremental mappings the difference that will always be 100, because all grains must be copied.
- Grain Size
- Indicates the grain size for this FlashCopy mapping. The following values are valid:
- I/O Group
- Displays the of the I/O group that this FlashCopy mapping is a member of.
Actions
The following action is available:
- Close
- Click this button to exit this panel.