total. In order to calculate the total cooling required by the library (in Btu/hr),
multiply the total power in watts by 3.4. To convert Btu/hr to kBtu/hr, divide
your result by 1000.
Table 45 provides a sample calculation of total power and cooling requirements for
a TS3500 Tape Library configuration consisting of one L23 with ten TS1130 tape
drives and mounting kits, four D23 models each containing six TS1130 tape drives
and mounting kits, one D23 with no drives or enhanced FCA feature (FC 1451),
two S24 models, and one HA1 model.
Table 45. Sample calculation of total library power consumption and cooling requirements.
This model
With this
feature
code
And these
tape drives
Quantity
Power (Watts)
Off Idle
Max.
continuous
L23
1515
1
TS1130
1 13 142 202
1004070
10 0 170 460
D23
(with FC
1451
2
)
1515
TS1130
4 52 412 412
24 0 96 168
24 0 408 1104
D23
(without
FC 1451)
N/AN/A1000
S24 N/A N/A 2 0 10 10
HA1 N/A N/A 1 0 24 85
Total power consumption: 65 1302 2511
Total cooling requirement (kBtu/hr): 0.2 4.4 8.5
Notes:
1. FC 1515: Tape drive mounting kit for L23 and D23 frames.
2. FC 1451: Enhanced frame control assembly for D23 and D53 frames.
Library power consumption is dynamic and usage dependent. Short peaks might
exceed the maximum continuous power values. Typical average power
consumption is lower than the calculated maximum continuous value because all
drives are not likely to be active simultaneously.
122 IBM System Storage TS3500 Tape Library with ALMS: Introduction and Planning Guide
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