Fujitsu ETERNUS DX60 S3 User Manual page 606

Chapter 7 Advanced Copy Management
7.6 Modify Copy Table Size
7
Click the [OK] button.
 Setting of the copy table size starts.
8
Click the [Done] button to return to the [Setting] screen.
■ How to calculate the copy table size
A dedicated memory area is required for Advanced Copy management and is allocated as a table size. The
table size and resolution settings are determined by the copy capacity and the number of sessions (volumes)
that will be run simultaneously.
(Table size (S)) [MB] = (S1) + (S2)
S1: Refers to the table size (MB) for EC/REC and for OPC/QuickOPC/SnapOPC/SnapOPC+ without OPC
Restoration.
S2: Refers to the table size (MB) for OPC/QuickOPC/SnapOPC/SnapOPC+ with OPC Restoration.
• Round the derived value up to the next multiple of 8 to obtain the correct setting for the copy table size.
• A copy table of the appropriate size (as derived above) is created in each CM.
• If the total table size value (S) exceeds the maximum size allowed, adjust the resolution (M) upward
until the maximum table size is no longer exceeded. The resolution (M) should be as small as possible.
• Maximum allowed table sizes are as follows:
Storage system name
ETERNUS DX60 S3
ETERNUS DX100 S3
ETERNUS DX200 S3
ETERNUS DX500 S3
ETERNUS DX600 S3
ETERNUS DX8700 S3
ETERNUS DX8900 S3
ETERNUS DX200F
• Allowance should be made for possible increases in the copy capacity.
• If the resolution is changed when a copy session exists, calculate the copy table size with the previous
resolution for the copy session that is being executed. For copy sessions that are created after the
resolution has been changed, calculate the copy table size with the new value.
• The same bitmap ratio (M) value must be used by both the copy source and copy destination storage sys-
tems. If the bitmap ratio settings for the copy source and copy destination storage systems are different,
REC cannot be performed. Note that the table sizes (S) do not need to be identical. If different
recommended resolutions are calculated for the copy source and copy destination storage systems, use
whichever resolution is greater for both storage systems. If the resolution (M) is changed, recalculate the
table size (S) setting for the storage system with the new resolution.
Maximum copy table size (per CM)
128 MB
512 MB
512 MB
1024 MB
4096 MB
12288 MB
12288 MB
512 MB
606
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
End of procedure
P2X0-1270-13ENZ0