HP Hitachi ShadowImage for Mainframe User Guide (T5213-96032, November 2011)

Figure 15 SIz and URz: Shared S-VOL/S-VOL
CAUTION: When you share an SIz S-VOL with a URz S-VOL as shown in Figure 15 (page 34),
the write operation to the URz P-VOL takes time. When the SIz pair is in the V-Split status, the write
operation to the URz P-VOL may take longer depending on the time needed for the copying process
of the SIz pair.
In addition, note that if the journal volume size is small, the URz pair may be suspended by failure
because of the shortage of the capacity of its journal volume.
Figure 16 (page 35) shows a volume that is functioning as both a URz P-VOL and an SIz S-VOL,
while the S-VOL of the same URz pair is also functioning as the S-VOL of another SIz pair. This
configuration allows you to:
• Use ShadowImage for Mainframe to provide on-site backup copies of URz P-VOLs and S-VOLs,
and/or
• Use URz to provide remote backup of SIz S-VOLs.
34 Interoperability with other Products and Functions