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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
Table 3-6 Number of Cylinders According to Each Emulation Type
Emulation type
Number of Cylinders
|
| 885 |
| |
|
|
|
|
|
|
| 1,770 |
| |
|
|
|
|
|
|
| 2,655 |
| |
|
|
|
|
|
|
| 1,113 |
| |
|
|
|
|
|
|
| 2,226 |
| |
|
|
|
|
|
|
| 3,339 |
| |
|
|
|
| |
|
|
|
|
|
|
| 10,017 |
| |
|
|
|
|
|
|
| 32,760 |
| |
|
|
|
|
|
|
| 65,520 |
| |
|
|
|
|
|
|
| 1,770 |
| |
|
|
|
|
|
|
| 885 |
| |
|
|
|
|
|
|
| 2,655 |
| |
|
|
|
|
|
|
| 1,113 |
| |
|
|
|
|
|
|
| 3,436 |
| |
|
|
|
|
|
|
| 10,017 |
| |
|
|
|
|
|
| Chapter 3 Preparing for Universal Replicator z/OS Operations | |||
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| Hitachi Universal Replicator for IBM /OS User’s Guide |