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HP StorageWorks XP12000 Disk Array Site Preparation Guide
Uninterruptible power supply (UPS)
Most disk array units are installed in data centers where a UPS strategy is
already in place. However, if you are making your first large disk array
purchase, you may need a separate UPS solution.
Caution
This section discusses a product UPS. If you are planning or already have a
site-wide UPS, HP recommends against using a product UPS powered by a
site-wide UPS for the XP12000.
Make sure your UPS satisfies the requirements in
Table 21
. Table values
are based on a worst-case voltage (rated voltage –10 percent) and a
maximum configuration of DKC/DKUs. A phase imbalance of 15 percent
is also included in the calculation.
In a maximum disk array configuration (one DKC and four DKUs), the
array requires 31 kVA.
Table 21. Single secondary input (primary offline) power requirements
Input (Vac)
Single-phase 30A
Single-phase 50A
Three-phase 30A
DKC
Each additional DKU DKC
Each additional DKU Each additional DKU
208
20.0 A
17.3 A
40.0 A
34.6 A
20.0 A
400
Not applicable Not applicable
Not applicable Not applicable
10.4 A
