Configuration Of Advanced Copy Function; Common Configuration In All Copy Methods; Configuration Of Snapshot Copy - Fujitsu ETERNUS DX60 Operation Manual

Function Name
Note
These are generic observations based on the mechanisms involved. Actual effect on servers will depend on the specifics of the usage
environment.
A.2

Configuration of Advanced Copy Function

A.2.1

Common Configuration in All Copy Methods

Copy Table Size Settings
Specify the following table size parameters for Advanced Copy. These parameters should be determined based on aggregate copy
capacity and number of active sessions (volumes), and then set them using the Web Console, ETERNUS Web GUI, or ETERNUS CLI.
-
Copy table size
The copy table size is memory area reserved for meta-data required for Advanced Copy management. Please allocate the this
table size in advance.
-
Resolution
Resolution represents the amount of data represented by each bit in the copy table.
The following table shows the possible values depending on the model:
Device Name
ETERNUS DX60/DX60 S2
ETERNUS DX80/DX80 S2
ETERNUS DX90/DX90 S2
ETERNUS DX100 S3/DX200 S3
ETERNUS DX200F
The default setting of 1 results in minimal internal overhead.
Please use the default value unless larger value is required due to the copy capacity.
A.2.2

Configuration of Snapshot Copy

Creating Copy Destination Volumes
When creating copy destination volumes for snapshot copy, note the following:
-
The type of a copy destination volume must be SDV.
OPEN, SDPV, standard or TPV cannot be used as a copy destination for snapshot copy.
-
The size of a copy destination volume must be the same as that of copy source volume (the original volume).
-
When creating an SDV, set the appropriate capacity.
Snapshot Copy
SnapOPC+
other low
modification
rate data
(generational
management is
available)
Specifiable Magnification
1(default), 2, 4, 8, 16
1(default), 2, 4, 8, 16, 32, 64
Copy Type
Clone Copy
EC OPC
-
Restoring
backup disk
- 90 -
QuickOPC
-
from Recovery from
physical disk
failure when
data
modification
rate is low