Installing the A5150A Adapter

SCSI Bus Termination

Table 2-3

Auto Termination PDC Versions

 

 

 

 

HP 9000 System

PDC Version

 

 

 

 

A400 and A500

40.20 or later

 

 

 

 

L-Class

39.40 or later

 

 

 

 

N-Class

39.41 or later

 

 

 

The A5150A is supported on the A400, A500, L-Class, and N-Class

HP 9000 systems.

Bus Termination

The SCSI bus must be properly terminated. The first and last physical SCSI devices on the ends of the SCSI bus must be terminated either by physical terminators or auto termination. The terminators of all other SCSI devices on the bus must be removed or disabled. Note that the A5150A HBA is also on the bus. However, because the A5150A HBA contains an automatic termination feature, external terminators on the HBA are not usually required. (Terminators are not shipped with the A5150A; you can order them separately, if needed.) The A5150A provides automatic termination when a SCSI cable from a powered SCSI device (a peripheral or other HBA) is connected to either the internal or external connector of the A5150A. Some exceptions where external terminators are required are described in “When and How to Turn Off Auto Termination” on page 31.

The older A5150A HBA (A5150-60001) has two sets of pins that control enabling and disabling (defeating) the auto termination feature. The pins—labeled A_TERM and B_TERM—are at the end of the HBA that is opposite the bulkhead connectors. A_TERM controls the auto termination feature for channel A, and B_TERM controls the feature for channel B.

NOTE

The A5150A’s auto termination feature cannot be set independently for

 

the internal and external connectors of the HBA.

 

 

30

Chapter 2

Page 30
Image 30
HP A5150A manual Bus Termination, Auto Termination PDC Versions, HP 9000 System PDC Version

A5150A specifications

The HP A5150A is a notable addition to HP's extensive line of desktop computers, designed to cater to both home and office users looking for a balance of performance and value. This model is characterized by its robust build and a range of features that enhance versatility and usability.

One of the standout features of the HP A5150A is its processor options. It typically comes equipped with a dual-core AMD Athlon processor, which provides ample power for everyday tasks such as web browsing, document editing, and multimedia playback. For users needing a little more performance, the system supports upgrades, allowing for future enhancements as demands change.

In terms of memory, the A5150A generally includes 1GB of DDR2 RAM, with options to expand depending on user needs. This flexibility ensures that users can manage multiple applications simultaneously without experiencing significant slowdowns, making it suitable for light multitasking.

Storage is another critical characteristic of the A5150A. The desktop commonly features a 160GB hard drive, offering enough space for essential files, programs, and media. However, users can benefit from additional storage options, as the unit typically supports multiple hard drive configurations, allowing for increased capacity or redundancy with RAID setups.

Graphics capabilities are addressed by an integrated ATI Radeon graphics processor, enabling decent performance for casual gaming and media playback. While it may not meet the demands of high-end gaming, the graphics hardware is sufficient for most users' everyday needs.

Connectivity features on the HP A5150A are comprehensive. It often includes multiple USB 2.0 ports for peripherals, audio jacks for headphones and microphones, and Ethernet connectivity for network access. Furthermore, connectivity options like VGA outputs provide compatibility with a variety of displays, enhancing the desktop's functionality.

The HP A5150A also places an emphasis on ease of use and manageability. With HP's user-friendly design, tasks such as upgrading components or performing maintenance can generally be completed without extensive technical knowledge. This focus on user accessibility is a significant advantage, especially for small business environments.

In summary, the HP A5150A stands out for its reliable performance, versatility, and user-friendly design. With features catering to both casual users and business applications, this desktop remains a solid choice for those in search of value without compromising essential functionalities. Its upgrade potential ensures that it can evolve alongside user needs, making it a lasting investment in the realm of personal computing.