Ibm RS/6000 Manuel d'utilisateur Page 58

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The system comes standard with an integrated PCI-based internal SCSI-2 fast/wide
adapter that can be used only for internal, single ended, either fast/wide, narrow or
both, SCSI-2 devices (maximum of seven).
Standard I/O Ports
The system provides the following standard I/O ports:
Keyboard port. The IBM Enhanced Keyboard is an optional feature on the
Model F30.
Mouse port. A port is provided to support an optional three-button mouse.
Two 9-pin D-shell serial connectors for external RS232 access.
One 25-pin parallel port that maintains complete compatibility with ISA, EISA
and microchannel parallel ports.
Power Supply
The system is provided with a 694-watt power supply unit with dual voltage to
enable large disk drive configurations. The power supply assembly consists of two
power supplies, a 474 watt supply and a 220 watt supply. Each supply can be
replaced separately.
2.5.2 Supported Optional Features
In this section, we consider as “optional features” the internal optional devices,
external adapters and external subsystems that can be configured on RS/6000
Model F30.
Most of the external adapters and subsystems supported by system F30 are
supported by system E20 as well. For this reason, we refer to the E20 external
adapters and subsystems described in the previous paragraphs when it is
necessary.
2.5.2.1 Internal Disk Drives
Internal SCSI-2 F/W disk drives in varied capacities in the industry standard
3.5-inch form factor can be installed on the system. Internal disk drives available
have 1.1 GB, 2.2 GB and 4.5 GB capacities, and their main characteristics are
described in Table 7 on page 35.
These disk drives are hot-swappable. They can be accommodated in any of the
hot-swap disk bays in the system using a hot-swap disk driver carrier. The “carrier”
is a tray providing an interface between the standard SCSI-2 disk drive and a
backplane connector that enables disks to be hot-swappable.
Both 1-inch height (half-height) and 1.6-inch (full-height) disk drives are supported,
but while half-height disks require only one hot-swappable bay, the full-height ones
occupy two. For this reason, the maximum number of full-height disk drives (4.5
GB disks) that can be installed is 9 (two bays for each drive), while the maximum
number of half-height disk drives is 18 (one bay for each drive).
34 Introduction to PCI-Based RS/6000 Servers
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