IBM p5 550 Technical Overview And Introduction page 14

dual-port Ethernet controller, two serial ports, two USB 2.0 capable ports, two HMC ports, two
RIO-2 ports, and two System Power Control Network (SPCN) ports.
The p5-550 includes four front-accessible, hot-swap-capable disk bays in a minimum
configuration with an additional four hot-swap-capable disk bays orderable as an optional
feature. The eight disk bays can accommodate up to 1.17 TB of disk storage using the
146.8 GB Ultra320 SCSI disk drives. Three non hot-swapable media bays are used to
accommodate additional devices. Two media bays only accept slim line media devices, such
as DVD-ROM or DVD-RAM, and one half-height bay is used for a tape drive. The p5-550 also
has I/O expansion capability using the RIO-2 bus, which allows attachment of the 7311 Model
D20 I/O drawers.
Additional reliability and availability features include redundant hot-plug cooling fans and
redundant power supplies. Along with these hot-plug components, the p5-550 is designed to
provide an extensive set of reliability, availability, and serviceability (RAS) features that
include improved fault isolation, recovery from errors without stopping the system, avoidance
of recurring failures, and predictive failure analysis.
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p5-550 Technical Overview and Introduction