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3-8 Chapter 3 Preparing for Universal Replicator z/OS Operations
Hitachi Universal Replicator for IBM /OS User’s Guide
Table 3-5 RAID Level Configuration of URz
Item Support specifications
RAID configuration of data
volume and journal volume
RAID1, RAID5, and RAID6 can coexist.
RAID1, RAID5, and RAID6 can coexist in the same journal group.
The Maximum Number of Pairs
Note: The number of pairs that can be created in a storage system is limited.
Use the number of cylinders and bitmap areas to calculate the maximum
number of pairs that can be created in a storage system.
• The number of cylinders:
The number of pairs of a primary data volume and a secondary data
volume is limited by the number of cylinders of the volumes to be paired
(i.e., the capacity of the volume. If VLL is used, the number of pairs
depends on the number of cylinders specified by VLL.). The limit on the
number of pairs is applied to both the primary storage system and the
secondary storage system.
Table 3-6 illustrates the number of cylinders
according to each emulation type.
Table 3-6 Number of Cylinders According to Each Emulation Type
Emulation type Number of Cylinders
3380-J 885
3380-E 1,770
3380-K 2,655
3390-1 1,113
3390-2 2,226
3390-3
3390-3R
3,339
3390-9 10,017
3390-L 32,760
3390-M 65,520
H6586-G 1,770
H6586-J 885
H6586-K 2,655
H6588-1 1,113
H6588-3 3,436
H6588-9 10,017