Data Retention Utility - Hitachi G200 User Manual

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
Read/Write
Read Only
Protect
S-VOL Disable
Read Only and S-VOL Disable
Protect and S-VOL Disable
The following tables show TC volumes and status with Data Retention Utility
operations that can be performed using Device Manager - Storage Navigator.
P-VOL
4-4
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
Volume type
TC PAIR
Volume status
SMPL
COPY
PAIR
PSUS
Sharing TrueCopy volumes
Used as TC P-VOL? Used as TC S-VOL?
Availability of TC P-VOL or S-VOL
P-VOL
Yes
Yes
Yes
Yes
Yes
Yes
DRU operation
Changing access attribute
Read/ Read Prote
Write Only ct
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
Yes Yes Yes
S-VOL
Yes
Yes
Yes
No
No
No
Referring
access
S-VOL
attribute
Disable
Yes Yes
Yes Yes
Yes Yes
Yes Yes