1About the SCv300 and SCv320 ExpansionEnclosureAn SCv300 and SCv320 expansion enclosure provides expansion storage for a Dell Storage Center.The SCv300 and SCv320 expansion enclosure connects directly to the SAS ports on the back of the storage system.SCv300 and SCv320 Expansion Enclosure OverviewThe SCv300 is a 2U expansion enclosure that supports up to 12 3.5‐inch hard drives installed in a four‐column, three-rowconfiguration. The SCv320 is a 2U expansion enclosure that supports up to 24 2.5‐inch hard drives installed vertically side by side.An SCv300 and SCv320 expansion enclosure ships with two redundant power supply/cooling fan modules and two redundantenclosure management modules (EMMs).SCv300 and SCv320 Expansion Enclosure Monitoring and DiagnosticsThe Storage Center OS generates alert messages for temperature, I/O module, fan module, disk, and power conditions for StorageCenter components. Use the Dell Storage Manager to view these alerts.LED indicators on the expansion enclosure also notify you of possible problems.SCv300 and SCv320 Expansion Enclosure Front-Panel Features andIndicatorsThe front panel shows the expansion enclosure status and power supply status.Figure 1. SCv300 Front-Panel Features and IndicatorsFigure 2. SCv320 Front-Panel Features and Indicators5