Table 34 Modified Data Size For Each Quickopc Resolution - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions
Backup (Advanced Copy)
For controller firmware versions earlier than V10L82
•
This combination is supported only if the copy size in both the copy source volume and the
copy destination volume is less than 2TB.
If the copy size is 2TB or larger, perform the following operations instead.
When performing a temporary recovery
-
Use a Cascade Copy of QuickOPC (copy session 1) and OPC (copy session 2).
When backing up two generations
-
Use a multi-copy that is configured with QuickOPC and QuickOPC.
For controller firmware versions V10L82 or later
•
When issuing a re-copy request for copy session 1 (a request to copy only the data that has
been updated after all data is copied), the modified data size should conform to the sizes
shown in
For example, when a QuickOPC session is created at a resolution of 2, the modified data size
should be less than 2TB. The "Resolution" for QuickOPC sessions can be checked on the [Ad-
vanced Copy (QuickOPC Sessions)] screen.

Table 34 Modified Data Size for Each QuickOPC Resolution

Resolution
Modified data
size
If a re-copy request is issued for a larger size, the command for the re-copy request may
time out and fail. The current "Modified Data Size" for copy session 1 can be checked on the
[Advanced Copy (QuickOPC Sessions)] screen. If an error occurs for copy session 1, perform
one of the following operations instead.
When performing a continuous Cascade Copy of QuickOPC
-
After the phase for copy session 2 becomes "Tracking", delete copy session 1. After chang-
ing the copy resolution of the ETERNUS DX, re-create copy session 1. For details on chang-
ing the resolution, refer to the "Modify Copy Table Size" section in "ETERNUS Web GUI Us-
er's Guide".
When performing a temporary recovery
-
Use a Cascade Copy of QuickOPC (copy session 1) and OPC (copy session 2).
When backing up two generations
-
Use a multi-copy that is configured with QuickOPC and QuickOPC.
*3: A Cascade Copy cannot be performed when a copy source and destination volume is in an
older ETERNUS storage system model.
*4: When copy session 1 uses the REC Consistency mode, the data transmission sequence of copy
session 1 is guaranteed, but the data transmission sequence of copy session 2 is not guaran-
teed.
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
Table 34.
1 2
Less than Less than
1TB 2TB
Copyright 2023 Fujitsu Limited
4 8 16
Less than Less than Less than
4TB 8TB 16TB
99
32 64
Less than Less than
32TB 64TB
P3AM-7642-32ENZ0