User`s manual

2-7
About Your New SmartRAID V Controller
SmartRAID V Decade and Century Features
SmartRAID V Decade and Century controllers are designed to provide
high performance solutions for workstations and servers in environments
where cost is a factor.
The following Decade and Century controllers are available:
PM1554U2 / PM2554U2 / PM2654U2
Type
Ultra2 Wide
Host Bus
32-bit PCI
Host/Internal Transfer Rate
132 MB/sec
I/O Transfer Rate
1
80 MB/sec
1. Maximum
transfer
rate per channel
The Decade (PM1554U2 ) controller features include:
• Onboard I/O processor (31 MIPs)
• Hardware RAID 0, 1, 5, 0+1 and 0+5
• Firmware XOR
• 4MB of onboard cache RAM
• Intelligent Hot Spare capability
• Conforms to revision 2.2 of the PCI specification
NOTE If an RA4050 module is attached to a PM1554U2 controller, the
controller’s onboard cache is disabled and only the cache on
the RA4050 cache is used (64MB maximum). The RA4050 also
adds hardware XOR capability which enhances RAID 5
performance.
Century controller features include:
• Onboard I/O processor
PM2554U2 (31 MIPs)
PM2654U2-R (40 MIPs)
• Hardware RAID 0, 1 and 0+1
• RAID 5 and 0+5 when using an RA4050 RAID Accelerator
• Up to 64MB of cache when using an RA4050 RAID Accelerator
• Intelligent Hot Spare capability
• Conforms to revision 2.2 of the PCI specification.