Storage system hardware
This chapter describes the front-end and back-end components of ME4 Series enclosures.
Some of the modules within the enclosure are replaceable as described in Module removal and replacement. The types of modules and
other components that can be replaced are defined below:
• CRU: Customer-replaceable Unit
• FRU: Field-replaceable Unit (requires service expertise)
The terms CRU and FRU are used throughout this document.
Topics:
• Locate the service tag
• Enclosure configurations
• Enclosure management
• Operation
• Enclosure variants
• 2U enclosure core product
• 5U84 enclosure core product
• 5U84 enclosure chassis
• Operator's (Ops) panel LEDs
• CompactFlash
• Controller failure when a single-controller is operational
Locate the service tag
Your ME4 Series storage system is identified by a unique Service Tag and Express Service Code.
The Service Tag and Express Service Code are found on the front of the system by pulling out the information tag. Alternatively, the
information might be on a sticker on the back of the storage system chassis. This information is used to route support calls to appropriate
personnel.
NOTE:
Quick Resource Locator (QRL):
• The QRL code contains information unique to your system. It can be found on the information tag and the
Setting Up
Your Dell EMC PowerVault ME4 Series Storage System
hard copy document provided with your ME4 Series
enclosure.
• Scan the QRL to get immediate access to your system information, using your smart phone or tablet.
Enclosure configurations
The storage system supports three controller enclosure configurations.
• 2U (rack space) controller enclosure (2U12)– see Figure 1. 2U12 enclosure system—front orientation and Figure 2. 2U12 enclosure
system—rear orientation: holds up to 12 low profile (1-inch high) 3.5" form factor disk drives in a horizontal orientation.
• 2U (rack space) controller enclosure (2U24)– see Figure 3. 2U24 enclosure system—front orientation and Figure 4. 2U24 enclosure
system—rear orientation : holds up to 24 low profile (5/8 inch high) 2.5" form factor disk drives in a vertical orientation.
• 5U (rack space) controller enclosure (5U84)– see Figure 5. 5U84 enclosure system—front orientation and Figure 6. 5U84 enclosure
system—rear orientation: holds up to 84 low profile (1-inch high) 3.5" form factor disk drives in a vertical orientation within the disk
drawer. Two vertically-stacked drawers each hold 42 disks. If used, 2.5" disks require 3.5" adapters.
These same chassis form factors are used for the supported expansion enclosures; but with I/O modules instead of controller modules.
The 2U12 and 2U24 enclosures support single or dual-controller module configurations, but the 5U84 enclosure only supports a dual-
controller module configuration. If a partner controller module fails, the storage system will fail over and run on a single controller module
until the redundancy is restored. For 2U enclosures, an controller module must be installed in slot A, and a controller module or a module
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Storage system hardware 5
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