Hitachi G200 - Data Retention Utility

Volume type Used as TC P-VOL? Used as TC S-VOL?
1. If the TC P-VOL and TC S-VOL are DP-VOLs, the TC S-VOL cannot be used as the SI
P-VOL.
2. If the TC S-VOL is a DP-VOL, the TC pair cannot be created. Create the TC pair after
completing volume migration or stopping the Volume Migration operation.
3. Volumes of which virtual LDEV ID was deleted cannot be used as a TC pair volume.
4. In a 3DC multi-target configuration or 3DC cascade configuration with 3 UR sites,
the volume which is shared by 2 UR pairs cannot be used for TrueCopy. Also, the
volume used for TrueCopy cannot be used as the volume to share between 2 UR
pairs.
The following topics include additional information about shared volumes.
Data Retention Utility
You can create a TC pair using volumes that have been assigned the access
attribute by the Data Retention Utility (DRU). However, you cannot specify a
volume with the "S-VOL Disable" attribute as a TC S-VOL.
The following table shows whether a DRU volume with the specified access
attribute can be used as a TC P-VOL or S-VOL.
DRU access attribute
Availability of TC P-VOL or S-VOL
P-VOL S-VOL
Read/Write Yes Yes
Read Only Yes Yes
Protect Yes Yes
S-VOL Disable Yes No
Read Only and S-VOL Disable Yes No
Protect and S-VOL Disable Yes No
The following tables show TC volumes and status with Data Retention Utility
operations that can be performed using Device Manager - Storage Navigator.
TC
Volume
PAIR
status
DRU operation
Changing access attribute
Referring
access
attribute
Read/
Write
Read
Only
Prote
ct
S-VOL
Disable
P-VOL SMPL Yes Yes Yes Yes Yes
COPY Yes Yes Yes Yes Yes
PAIR Yes Yes Yes Yes Yes
PSUS Yes Yes Yes Yes Yes
4-4
Sharing TrueCopy volumes
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models