Hitachi TrueCopy for z/OS (T1711-96009, June 2006)

64 TrueCopy for the XP1024/XP128/XP12000/XP10000
The following figure shows an example of a volume that is functioning as both a TC390 R-VOL and an
SI390 S-VOL. With this configuration, you can use SI390 to provide additional remote copies of TC390
M-VOLs. This configuration is not allowed when At-Time Split is used on SI390.
Figure 21 TrueCopy and ShadowImage: shared R-VOL/S-VOL
The following figure shows an example of a volume that is functioning as both a TC390 M-VOL and an
SI390 S-VOL, while the R-VOL of the same TC390 pair is also functioning as the S-VOL of another SI390
pair. With this configuration, you can:
• Use TC390 to provide remote backup of SI390 S-VOLs.
• Use SI390 to provide on-site backup copies of TC390 M-VOLs and R-VOLs.
Figure 22 TrueCopy and ShadowImage: shared M-VOL/S-VOL and R-VOL/S-VOL
The following figure shows an example of a volume functioning as both a TC390 M-VOL and an SI390
T-VOL.
NOTE: This configuration does not allow SI390 and TC390 to copy at the same time. Create the SI390
pair first, and then split the pair before creating the TC390 pair. You must suspend the TC390 pair to
resync the SI pair.
Figure 23 TrueCopy and ShadowImage: shared M-VOL/T-VOL
Combining TrueCopy for z/OS® and Virtual LVI/LUN
Virtual LVI/LUN volumes can be assigned to TCz pairs, as long as the R-VOL has the same or larger
capacity than the M-VOL. If you need to perform Virtual LVI/LUN operations on an existing TCz M-VOL or
R-VOL, you must delete the pair first to return the volume to simplex status. For further information on Virtual
LVI/LUN, please refer to the LUN Expansion (LUSE)/Virtual LVI/LUN (VLL) User's Guide.
Combining TrueCopy for z/OS® and Cache Residency Manager
Cache Residency Manager volumes can be assigned to TCz pairs, and Cache Residency Manager
operations can be performed on TCz M-VOLs and R-VOLs. For further information on Cache Residency
Manager, please refer to the Cache Residency Manager User's Guide.