Dell SC4020 - 3 SC4020 Storage System Technical Specifications; Table 1. Hard Drives; Table 2. Storage Controllers; Table 3. Storage Connectivity

SC200/SC220 Expansion Enclosure Overview
The SC200 is a 2U expansion enclosure that supports up to 12 3.5‐inch hard drives installed in a four‐
column, three-row configuration. The SC220 is a 2U expansion enclosure that supports up to 24 2.5‐inch
hard drives installed vertically side by side.
An SC200/SC220 expansion enclosure ships with two redundant power supply/cooling fan modules and
two redundant enclosure management modules (EMMs).
SC200/SC220 Expansion Enclosure Front-Panel Features and Indicators
The SC200/SC220 front panel shows the expansion enclosure status and power supply status.
Figure 15. SC200 Front-Panel Features and Indicators
Figure 16. SC220 Front-Panel Features and Indicators
Item Name Icon Description
1 Expansion enclosure
status indicator
Lights when the expansion enclosure power is on.
• Off: No power
• On steady blue: Normal operation
• Blinking blue: Storage Center is identifying the
expansion enclosure
• On steady amber: Expansion enclosure is turning on or
was reset
• Blinking amber: Expansion enclosure is in the fault state
2 Power supply status
indicator
Lights when at least one power supply is supplying power
to the expansion enclosure.
• Off: Both power supplies are off
• On steady green: At least one power supply is providing
power to the expansion enclosure
3 Hard drives — Dell Enterprise Plus Drives
• SC200: Up to 12 3.5-inch hard drives
About the SC4020 Storage System
25