Product Overview 1-7
■32 Logical Unit (LUNs) per host channel (some operating systems may be limited to 8)
■Support for Hot and Warm spare disks
■UPS-backed write caching
■Per LUN write cache/write back selection
■Configuration/Maintenance via RS-232 or host SCSI channel using StorageWorks Command Console (SWCC)
■Update of firmware via host channel
Pedestal Power Supplies
The pedestal has two interchangeable, air-cooled, AC power supply modules located at the rear of the unit. The power supplies provide redundant power if one of the units should malfunction. Each supply provides +5 and +12 VDC to power the RAID controller, EMU, and the storage SBBs in the pedestal. In addition, each unit contains a high-speed fan for pedestal cooling. The upper power supply is designated as A and the lower as B. The unit contains an AC power receptacle, a power status LED, a fan, and a latching slider switch to secure the supply in the pedestal.
UPS
The UPS is separate and free-standing unit designed to protect the pedestal from problems associated with poor quality AC power or a complete loss of AC power. The UPS is connected between the AC outlet and the line input of the pedestal power supply B to provide battery backup power.
The major features of the UPS include Cell Saver Technology (doubles battery life and speeds recharge time), hot-swap batteries, and network surge protection. The front panel display has user controls (LEDs and control buttons) and the rear panel contains a COMM port, which provides UPS status to the EMU in the pedestal. The rear panel also contains the network surge protector, a reset button, and four power receptacles. An audible alarm is activated when input power fails, as a Low Battery Warning, or whenever the UPS is in need of servicing.
The UPS automatically recharges its battery when power is returned following a power failure. Recharge time is four to six hours depending on the energy requirements of your load and the length of the power outage.