SC4020 Storage System Owner’s Manual

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Technical Specifications

The following tables describe the technical specifications of an SC4020 storage system.

Table 1. Hard DrivesHard drive specifications.
Drives
SAS hard drives	Up to 24 2.5-inch SAS hot-swappable hard drives (6.0 Gbps)

Table 2. Storage ControllersStorage controller specifications.
Storage Controllers
Configurations	Two hot-swappable storage controllers with the following IO options: Two 16 Gbps Fibre Channel ports Four 8 Gbps Fibre Channel ports Two 10 Gbps iSCSI ports Four 12 Gbps SAS ports

Table 3. Storage ConnectivityStorage connectivity specifications.
Storage Connectivity
Configurations	Supports up to 192 drives in one redundant-path SAS chain Supports up to 14 SC200 expansion enclosures and up to 7 SC220 expansion enclosures

Table 4. RAIDRAID specifications.
Redundant Array of Independent Disks (RAID)
Controller	Two hot-swappable storage controllers
Management	RAID management using the Dell Storage Manager Client

Table 5. Back Panel PortsBack panel port specifications.
Back-Panel Ports Connectors (per Storage Controllers)

Fibre Channel, iSCSI, or SAS connectors	Connection to a Fibre Channel fabric, iSCSI network, or a direct connection to servers with SAS HBAs
Ethernet connectors	MGMT – 1 Gbps or 10 Gbps embedded Ethernet/iSCSI port that is typically used for system management REPL – 1 Gbps or 10 Gbps embedded iSCSI port that is typically used for replication to another Storage Center
SAS connectors	6 Gbps SAS connectors for SAS port redundancy and additional expansion enclosures NOTE SAS connectors are SFF-8086/SFF-8088 compliant
USB Connector	One USB 3.0 connector NOTE For engineering use only
Serial connector	Used for initial configuration and support only functions

Table 6. LEDsLED specifications.
LED Indicators
Front panel	One two-color LED indicator for system status. One single-color LED indicator for power status. Two-digit, seven-segment display indicating the storage system ID number ID button with a single-color LED indicating startup and pressed states
Hard drive carrier	One single-color activity LED One single-color LED status indicator per drive
Storage controller module	Two single-color LEDs per Ethernet port indicating activity and link speed Four dual-color LEDs per SAS connector indicating port activity and status One single-color LED indicating status One single-color LED indicating fault One single-color LED for identification Eight single-color LED for diagnostics
Power supply/cooling fan	Four LED status indicators for Power Supply Status, AC Fail status, DC Fail status, and Fan Fail status

Table 7. Power SuppliesPower supply specifications.
Power Supplies
AC power supply (per power supply)
Wattage	580 W (maximum wattage: 584 W)
Voltage	100–240 VAC (7.6 A–3.0 A)
Heat dissipation	65 W at 230 VAC and 99 W at 115 VAC
Maximum inrush current	Under typical line conditions and over the entire system ambient operating range, the inrush current might reach 45 A per power supply for 40 ms or less

Table 8. Hard Drive PowerHard drive power specifications.
Available Hard Drive Power (per Slot)
Supported hard drive power consumption (continuous)	Up to 1.2 A at +5 V Up to 0.5 A at +12 V

Table 9. Physical DimensionsPhysical dimension specifications.
Physical
Height	8.79 cm (3.46 in.)
Width	48.2 cm (18.98 in.)
Depth	54.68 cm (21.53 in.)
Weight (maximum configuration)	24 kg (53 lb)
Weight without drives	19 kg (41 lb)

Table 10. EnvironmentalEnvironmental specifications.
Environmental
For additional information about environmental measurements for specific storage system configurations, see www.dell.com/environmental_datasheets.
Temperature
Operating	10°C to 35°C (40°F to 95°F) with a maximum temperature gradation of 20°C per hour
Storage	–40° to 65°C (–40° to 149°F) at a maximum altitude of 12,000 m (39,370 ft)
Relative humidity
Operating	10% to 80% (noncondensing) with 29°C (84.2°F) maximum dew point
Storage	5% to 95% (noncondensing) with 33°C (91°F) maximum dew point
Maximum vibration
Operating	0.21 G at 5–500 Hz for 15 min
Storage	1.04 G at 2–200 Hz for 15 min
Maximum shock
Operating	Half-sine shock 5 G +/- 5% with a pulse duration of 10 ms +/- 10% in operational orientations only
Storage	Half-sine shock 30 G +/- 5% with a pulse duration of 10 ms +/- 10% (all sides)
Altitude
Operating	0 m to 3,048 m (0 ft to 10,000 ft) For altitudes above 915 m (3,000 ft), the maximum operating temperature is derated 1°C per 300 m (1°F per 547 ft)
Storage	–300 m to 12,192 m (–1000 ft to 40,000 ft)
Airborne Contaminant Level
Class	G1 or lower as defined by ISA-S71.04-1985