Texas Memory Systems RamSan-300/320 - Manual (Page 8)

1.2 System Components
The system components for the RamSan-300 include:
• Main system memory ranging from 16 to 64 Gigabytes
• One to four Fibre Channel controllers
• Dual, redundant hot-swappable power supplies
• Redundant fans
• Ethernet monitoring port
• Serial monitoring port
• Front panel display for monitoring and configuration
• SNMP based monitoring
• Java-based Web monitoring
The system components for the RamSan-320 also include:
• Internal backup RAID
• Redundant batteries (N+1)
1.3 Power
The RamSan includes two power supplies. Only one power supply is
needed to run the system. The power supplies are auto-ranging (they
accept either 110 or 220 power).
The RamSan-320’s power supplies are connected to an internal battery
pack. The battery pack provides up to 30 minutes of operation after a
power failure. In the event one battery or power supply fails, the other
functional power supply and battery combination handles the system
operation. You can monitor power supply temperature and voltages from
the system monitoring software.
If a RamSan-320 looses power, it operates for five minutes before
shutting down. The shutdown process involves synchronizing data to the
internal hard disk drives. If the system determines that the battery life
will not last the full shutdown delay period, it starts the synchronization
process.
When power is restored, the RamSan-320 restores system memory with
the data from the internal hard disk drives and then resumes normal
operations. In addition, the system begins recharging the batteries. You
can monitor the battery charge levels using the bundled remote
monitoring software.
1.4 Non-Volatility
By utilizing internal hard drives and batteries, the RamSan-320 combines
the performance of SDRAM storage with the non-volatile nature of hard
disk drives. TMS equips the RamSan-320 with an internal backup RAID.
The backup RAID can operate at about 80 MB/sec during operation. In
order to operate the drives after a power failure occurs, the RamSan-320
RamSan-300/320 User’s Manual - 4 -