HP XP Business Copy Software - Manual (Page 49)

Figure 21 BC and Continuous Access XP Journal: Shared P-VOL/P-VOL
.
The configuration shown in Figure 22 is an example of a volume that functions as both a Continuous
Access XP Journal S-VOL and a BC P-VOL. This configuration allows you to use BC to provide remote
copies of Continuous Access XP Journal S-VOLs.
Figure 22 BC and Continuous Access XP Journal: Shared P-VOL/S-VOL
.
CAUTION:
When you share a BC P-VOL with a Continuous Access XP Journal S-VOL as shown in Figure 22 ,
the write operation to the Continuous Access XP Journal P-VOL takes time. Especially, when the BC
pair is in the PSUS(SP) status, the write operation to the Continuous Access XP Journal P-VOL may
take extra time due to the time for copying to the BC pair. In addition, if the journal volume size is
small, the Continuous Access XP Journal pair may be suspended and fail due to a shortage of the
capacity of its journal volume.
Figure 23 is an example of a volume that functions as both a Continuous Access XP Journal P-VOL
and a BC P-VOL, while the S-VOL of the same Continuous Access XP Journal pair also functions as
the P-VOL of another BC pair. This configuration allows you to:
• Use BC to provide on-site backup copies of Continuous Access XP Journal P-VOLs and S-VOLs
• Use Continuous Access XP Journal to provide remote backup of BC P-VOLs
XP Business Copy User Guide 49