• Airflow passes between drive carriers and through each enclosure.
• Airflow for the upper 4U of the 5U enclosure enters the front, passes between the disk drives, and exits
through the large fans in the rear of the enclosure.
• Airflow for the lower 1U of the 5U enclosure is driven through the power supplies via 40 mm X 56 mm
fans. Air continues through the chassis cooling the ESMs or controllers and exits the rear of the
enclosure.
• The combined power and cooling module exhausts air from the rear of each canister.
Ensure that your environment falls within the ranges that are shown in Table 20 on page 97.
Table 20. Temperature requirements
Environment
Ambient
temperature
Altitude
Relative humidity
Maximum wet bulb
temperature
Operating
5°C to 35°C
(41°F to 95°F)
0 - 3048 m
(0 - 10000 ft)
8% to 80%
noncondensing
23°C (73°F)
Non-operating
1°C to 50°C
(34°F to 122°F)
-305 to 12192 m
(-1000 to 40000 ft)
8% to 80%
noncondensing
27°C (80°F)
Storage
1°C to 60°C
(34°F to 140°F)
5% to 80%
noncondensing
29°C (84°F)
Shipping
-40°C to 60°C
(-40°F to 140°F)
5% to 100%
condensing, but not
precipitating
Dimensions and weight requirements for rack installation
Ensure that space is available in a standard 19" rack that is capable of supporting the enclosure. The rack
rail kit supports racks with either threaded round or square rail mounting holes. The following table lists
the dimensions and weights of the enclosures.
Table 21. Physical characteristics of the enclosures
Enclosure
Height
Width
Depth
Maximum weight
Drive ready
(without
drive
modules)
Fully
configured
(with drive
modules)
2077-424 and 2078-U5B
Control Enclosures with 24
drive slots
87 mm
(3.46 in.)
483 mm
(19.0 in.)
850 mm
(33.5 in.)
44.85 kg
(98.87 lb)
49.65 kg
(109.46 lb)
Warning: The 2078-92F model needs 968 mm from the rack front post to the back of the cable
management arm (CMA). Some racks do not provide sufficient space to close the rear door. In
addition, allow 905 mm from the front post to the back of the enclosure. To allow space for the
power cables, provide 60 to 70 mm from the back of the enclosure.
Figure 81 on page 98 shows the rack space requirements for the 2078-92F models.
Appendix C. Control enclosure requirements 97
Summary of Contents for Storwize V5100 MTM 2078-12F
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