Disk-array enclosure
VNX5700 Hardware Information Guide 65
Power supply
In a 2U or 3U DAE, the power supply/cooling module integrates independent power
supply and blower cooling assemblies into a single module.
Each power supply is an auto-ranging power-factor-corrected, multi-output, off-line
converter with its own line cord. The drives and LCC have individual soft-start switches
that protect the disk drives and LCC if you install them while the disk enclosure is powered
up. A disk or blower with power-related faults will not affect the operation of any other
device.
In a 2U or 3U DAE, each power/cooling module has three status LEDs (Figure 57 on
page 69 and Figure 64 on page 75).
In a 4U DAE, the power supplies (Figure 84 on page 94) and cooling modules (Figure 77 on
page 87) are separated and located at opposite ends of the 4U DAE. The power supplies
are located on the rear of the 4U DAE while the cooling modules or fans are located on the
rear of the 4U DAE. The power supplies can be installed/removed from the rear of the DAE
while the cooling modules or fans can only be installed/removed by sliding the DAE
forward, then sliding the DAE cover to the rear. You access the cooling modules or fans
from inside the DAE (“Access to disk drives, LCCs, and cooling modules” on page 80
provides more information).
Cooling modules
In a 2U or 3U DAE, the enclosure cooling system consists of dual-blower modules in each
power supply/cooling module.
In a 4U DAE, the cooling modules are separate from the power supply modules.
EMI shielding
EMI compliance requires a properly installed electromagnetic interference (EMI) shield in
front of the DAE disk drives. When installed in cabinets that include a front door, the DAE
includes a simple EMI shield. Other installations require a front bezel that has a locking
latch and integrated EMI shield. You must remove the bezel/shield to remove and install
the disk drive modules.
3U, 15 (3.5-inch) DAE front view
On the front, viewing from left to right, the Block and File (Unified) VNX5700 platform 3U,
15 (3.5-inch) disk drive DAE carrier includes the following hardware components:
◆ 3.5-inch 6-Gb/s SAS, 6-Gb/s NL-SAS, or Flash disk drives (hot-swappable)
◆ Status LEDs
Figure 55 on page 66 shows the location of these components.
Note: In a Block and File (Unified) VNX5700 platform, when using the 3U, 15 (3.5-inch)
disk drive carrier, the maximum amount of disk drives is 495.
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