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AIX Version 4.3 Differences Guide

AIX Version 4.3 Differences Guide

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The RS/6000 Enterprise Server Model S70 Advanced is shipped and delivered<br />

with all the internal adapters and devices already installed and configured. <strong>AIX</strong><br />

<strong>Version</strong> <strong>4.3</strong>.2 software is included with every S7A and can be preinstalled if<br />

desired.<br />

Figure 1. RS/6000 Enterprise Server Model S7A<br />

1.1.2 I/O Drawer Specification<br />

Other than the CPU speed increase and maximum supported memory<br />

configuration, the main difference between the new Model S7A and the Model<br />

S70 is the new I/O drawer.<br />

The new I/O drawer differs from the previous S70 drawer in the following details:<br />

• Ten EIA units in size instead of seven EIA units.<br />

• Dual redundant hot pluggable power supplies. Although the previous model<br />

drawer has two power units, they power different drawer components. This<br />

means the failure of a single power supply results in the whole drawer being<br />

unusable.<br />

• N+1 hot pluggable cooling fans.<br />

• Support for internal SSA disk drives (not in primary drawer). It is only possible<br />

to have internal SCSI disks in the previous drawer.<br />

• Ultra SCSI internal disks connected to an Ultra SCSI adapter card. The<br />

previous drawer used Ultra SCSI disks connected to a SCSI-2 F/W adapter.<br />

• The option of implementing an internal SCSI disk system as two 6-packs,<br />

each driven by a separate SCSI adapter. This is useful when mirroring disks<br />

for availability, as it means the disk adapter is no longer a single point of<br />

failure. The previous drawer implemented the internal SCSI disk as one<br />

12-pack. All disks in the drawer were attached to one SCSI controller.<br />

2 <strong>AIX</strong> <strong>Version</strong> <strong>4.3</strong> <strong>Differences</strong> <strong>Guide</strong>

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