HP XP P9500 Storage - Manual (Page 8)

Figure 1 Multiple relationships
You cannot create a cascaded relationship. That is, an extent that is already set as a copy target
cannot be used as a copy source to create a new relationship, as shown in the following figure.
Figure 2 Cascaded Compatible FlashCopy relationship not supported
Copy modes
When you establish a Compatible FlashCopy relationship, you select the mode, COPY or NOCOPY,
for the copy operation. NOCOPY mode can be selected only for Compatible FlashCopy SE.
When you select COPY mode, all data in the S-VOL is copied to the T-VOL. This process is called
background copying. When the background copying is complete, the pair is automatically
withdrawn. When you select NOCOPY mode, the background copying operation is not performed.
If there is a request for a write operation to an S-VOL in which the requested data is not yet copied,
or a request for a read/write operation to a T-VOL in which the requested data is not yet copied,
8 About Compatible FlashCopy operations