Compaq S5 manual Configuration Note, Maximum Allowable Cable Distances

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DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable)

2.2Configuration Note

According to the UltraSCSI Configuration Guidelines (included in your purchase), the maximum allowable cable distance for an UltraSCSI Domain is 74 meters. Each element, including the DWZZH-09 has an associated relative cable distance value associated. Cables count as their specified distance, (including the 0.5 meter jumper cable between the SBB Hubs); but each DWZZH SBB counts as an 18.5 meter cable equivalent. This means that communications from a server attached to the left-hand SBB to a server attached to the right-hand SBB, already has a 37.5 meter cable equivalent distance cost to propagate the signal through the DWZZH-09 Hub. Therefore, if the distance from server A to the Hub is X, and the distance from server B to the Hub is Y, then the sum cable distance of X and Y must be less than or equal to 36.5 meters (74 – 37.5). Please note that any SCSI transaction from a host to the storage subsystem only propagates through one of the SBBs. This means that you may still have a cable length of 25 meters between the storage subsystem and the DS-DWZZH-09. Refer to Figure 2–4.

Figure 2–4 Maximum Allowable Cable Distances

2–4

EK–SMDZS–UG. B01

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Contents Dwzzh 16-Bit UltraSCSI Hub Rack-Mountable Japanese Vcci Statement Second edition, NovemberContents Figures TablesRevision Record Revision Level Date Summary of ChangesPage Related Documentation About This GuideAudience Document Structure Introducing the 16-Bit UltraSCSI Hub Rack-MountableGetting Help Page UltraSCSI Hub Features Introducing the 16-Bit UltraSCSI Hub Rack-MountableProduct Descriptions DWZZH-S5 DWZZH-S5DWZZH-09 DWZZH-09Product Specifications Lists the functional specifications for the Dwzzh HubDwzzh HUB Functional Specifications Cont’d Page Install 0.5m Cable in DWZZH-09 Setting Up the DWZZH-09Set Up DWZZH-09 Install Tri-link and Cable in Storage Ports of SBBs A Sample Configuration Configuration Note Maximum Allowable Cable DistancesUsing the 16-Bit UltraSCSI Hub Large Hub Fair ArbitrationLarge Hub Addressing Configurations Narrow Addressing SettingDWZZH-S5 Scsi ID Assignments Front Panel DWZZH-09 Scsi ID AssignmentsDWZZH-S5 Front Panel Fair ARB Disable IndicatorsDWZZH-S5 Scsi Narrow ID Assignments Determining the Configuration Selecting the Scsi CablesInstalling the DWZZH-09 Upgrade Kit DWZZH-09 Upgrade Kit ContentsInstall Upgrade Install 0.5m CableInstall power cords in power supplies on unit Page Swcc and UltraSCSI Hubs Agents and StorageRunning One Swcc Agent for a Particular Storage Subsystem Removable Parts of the DWZZH-S5 and DWZZH-09 Part Number DescriptionFigure A-1 Removable Parts of the DWZZH-S5 Glossary ControllerSBB Scsi cable

S5 specifications

The Compaq S5, introduced in the mid-1990s, marked a notable entry in the realm of portable computing. This laptop was part of Compaq's efforts to deliver user-friendly, mobile computing solutions for both personal and professional environments. Combining functionality with compact design, the S5 quickly became popular among users seeking a reliable machine for everyday tasks.

One of the standout features of the Compaq S5 was its impressive portability. Weighing in at just around 5.3 pounds, the laptop was light enough to carry without much hassle, making it an ideal companion for on-the-go professionals. It boasted a slim profile that fit comfortably into most laptop bags, catering to those who valued mobility in their devices.

The S5 was equipped with a 10.4-inch passive matrix TFT display, offering a resolution of 640 x 480 pixels. While the display technology may seem modest by today’s standards, it provided decent visual clarity for the time, making it suitable for activities like document editing and basic multimedia viewing. With a maximum brightness of 80 nits, the screen could perform adequately in various lighting conditions, though it wasn't impervious to reflections.

In terms of performance, the Compaq S5 featured an Intel Pentium processor, delivering adequate speed for the software of the era, including word processing and simple graphic manipulations. The configurations typically included 8 to 16 MB of RAM and a hard drive ranging from 120 to 500 MB, which were quite acceptable for the applications common in the mid-90s.

The laptop ran on MS-DOS with Windows 3.1, allowing users to leverage the growing suite of software available for the platform. The integration of a floppy disk drive further complemented the machine's capability, facilitating easy file transfers and software installations, even as other storage technologies began emerging.

Connectivity options were limited by today's standards, but the Compaq S5 featured a modem port for dial-up connections, allowing users to connect to the internet through telephone lines. The laptop was also designed to support external peripherals through serial and parallel ports, providing some flexibility for additional functionality.

Battery life, an essential attribute for any portable device, was decent for the Compaq S5. It typically offered around 2 to 4 hours of usage on a single charge, depending on workload and settings. This made it viable for brief meetings or travel, although users often sought access to power outlets to extend their computing sessions.

In conclusion, the Compaq S5 represented a pivotal moment in portable computing during the 1990s. While it may not meet today's expectations for performance and features, it successfully tapped into the growing demand for mobile computing solutions and provided a reasonably powerful platform for that era.