Rear drive channel ports
Figure 2 shows the drive channel ports on the storage expansion enclosure.
Table 2 describes the rear view of drive channel ports shown in Figure 2.
Table 2. Description of rear view of drive channel ports
Number
Description
1
ESM A
2
ESM B
3
Port 1A
4
Port 1B
5
Port 2A (Reserved for future use)
6
Port 2B (Reserved for future use)
Power supply and fan units
The storage expansion enclosure has two removable power supply and fan units.
Each power supply and fan unit contains one power supply and two fans. The
four fans pull air through the drive from front to back across the drives.
The fans provide redundant cooling, which means that if one of the fans in either
fan housing fails, the remaining fans continue to provide sufficient cooling to
operate the storage expansion enclosure. The power supplies provide power to the
internal components. If one power supply is turned off or malfunctions, the other
power supply maintains electrical power to the storage expansion enclosure. To
preserve the optimal airflow, do not remove a failed power supply and fan unit
FRU from the EXP395 chassis until you are ready to replace it with a new FRU.
Figure 3 on page 7 shows power supply and fan unit components.
Note:
Although both power supply and fan units (left and right) are identical, they
are seated in the EXP395 chassis in opposite orientations. If the power
Figure 2. Rear view of drive channel ports
6
IBM System Storage DS3950 EXP395 Storage Expansion Enclosure: Installation, User’s, and Maintenance Guide
Summary of Contents for DS3950
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