HP XP Business Copy Software - Manual (Page 41)

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The configuration shown in the following figure is an example of a volume that is functioning as both an
SI390 S-VOL and a TC390 R-VOL. With this configuration, you can use SI390 to provide additional remote
copies of TC390 M-VOLs.
Figure 11 SI390 and TC390: shared S-VOL/R-VOL
CAUTION: When you share an SIz S-VOL with a TCz R-VOL as shown in Figure 3.2, the write operation
to the TCz M-VOL takes time. Especially, when the SIz pair is in the V-Split status, the write operation to the
TCz M-VOL may take extra time according to the time for copying process of the SIz pair.
In addition, note that in the case of TCzA, the TCz pair may be suspended by failure because of the
shortage of the capacity of its side file.
The configuration shown in the following figure is 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 SI390 to provide on-site backup copies of TC390 M-VOLs and R-VOLs.
• Use TC390 to provide remote backup of SI390 S-VOLs.
Figure 12 SI390 and TC390: shared S-VOL/M-VOL and S-VOL/R-VOL
The configuration shown in the following figure is an example of a volume functioning as both an SI390
T-VOL and a TC390 M-VOL.