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Combining BC an
d Continuous Access XP operations
BC and Continuo
us Access XP can function together in the same disk array to provide both internal
and remote bac
kup for important data.
NOTE:
• BC is recommended for intra-disk array copy operations. If BC is not installed, use Continuous
Access XP (syn
chronous only) to copy within the same local disk array. This Continuous Access XP
configuration requires at least one external ESCON® cable loop (minimum of two is recommended).
• Combining BC L1 and L2 pairs with Continuous Access XP volumes is allowed. Continuous Access XP
considersnodeandleafvolumessecondaryvolumes(S-VOLs).
NOTE:
Reverse resync and quick restore operations cannot be performed on BC/Continuous Access XP shared
volume pairs.
The configuration shown in Figure 18 is an example of a volume functioning as both a Continuous Access
XP P-VOL and BC P-VOL. With this configuration, you can perform the following:
• Use BC to provide on-site backup copies of Continuous Access XP P-VOLs
• Use Continuous Access XP to provide remote backup copies of BC P-VOLs
Figure 18 BC and Continuous Access XP: shared P-VOL/P-VOL
The configuration shown in Figure 19 is an example of a volume functioning as both a Continuous
Access XP S-VOL and BC P-VOL. With this configuration, you can use BC to provide remote copies of
Continuous Access XP S-VOLs.
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Business Copy XP (BC) for the Array