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BC and Continuous Access XP Journal can function together in the same Local disk array to provide both
internal and remote backup for your important data.
NOTE:
• A primary volume (P-VOL) of Continuous Access XP Journal means a primary data volume of
Continuous Access XP Journal. A secondary volume (S-VOL) of Continuous Access XP Journal means
a secondary data volume of Continuous Access XP Journal.
• Combining BC L1 and L2 pairs with Continuous Access XP Journal volumes is allowed. Continuous
Access XP Journal considers node and leaf volumes as secondary volumes (S-VOLs).
The configuration shown in Figure 15 is an example of a volume that functions as both a Continuous
Access XP Journal P-VOL and a BC P-VOL. This configuration allows you to:
• Use BC to provide on-site backup copies of Continuous Access XP Journal P-VOLs
• Use Continuous Access XP Journal to provide remote backup copies of BC P-VOLs
Figure 15 BC and Continuous Access XP Journal: Shared P-VOL and P-VOL
CAUTION:
When you share a BC P-VOL with a Continuous Access XP Journal S-VOL as shown in Figure 16,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.
The configuration shown in Figure 16 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.
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Business Copy XP (BC) for the Array