No Snapshot-Tce Cascade Configuration - Hitachi AMS2100 User Manual

No SnapShot-TCE cascade configuration

Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
Table 2-17: Formula for Calculating Maximum Supported
Capacity Value for P-VOL/Data Pool (AMS2500)
Capacity of Cache Memory
Installed
8 GB/CTL
10 GB/CTL
12 GB/CTL
16 GB/CTL
In no SnapShot-TCE cascade configuration, you need to add all
volumes of SnapShot and TCE in
1 TB×4 LU ÷ 5 + less than 0.6 TB < 1.4 TB
Figure 2-10: No SnapShot-TCE cascade configuration
Planning and design
Capacity Spared for the Differential
Data (Shared by SnapShot and TCE)
Total P-VOL of SnapShot and P-VOL (S-VOL)
of TCE capacity ÷ 5 + Total data pool
capacity < 12.0 TB
Total P-VOL of SnapShot and P-VOL (S-VOL)
of TCE capacity ÷ 5 + Total data pool
capacity < 15.0 TB
Total P-VOL of SnapShot and P-VOL (S-VOL)
of TCE capacity ÷ 5 + Total data pool
capacity < 18.0 TB
Total P-VOL of SnapShot and P-VOL (S-VOL)
of TCE capacity ÷ 5 + Total data pool
capacity < 24.0 TB
Table 2-15 to Table 2-17.
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