A+ Fast Pass by et al., David Groth, Faithe Wempen

By et al., David Groth, Faithe Wempen

The best A+ instruction and evaluation ToolFrom the writer of Sybex's best-selling A+ research consultant comes the streamlined device you want to bone up on serious A+ info: A+ quickly go. The enclosed CD permits you to perform, perform, perform so that you can strategy the checks with confidence.Coverage includes:Installing, configuring, and upgrading hardwareDiagnosing and troubleshooting problemsPerforming preventive maintenanceAddressing security and environmental issuesWorking with motherboards, processors, and memoryWorking with printersUnderstanding actual networking techniquesUnderstanding OS fundamentalsInstalling, configuring, and upgrading working structures and applicationsDiagnosing and troubleshooting software program problemsConfiguring community software program

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There are several types of RAID: RAID 0 Also known as disk striping. This is technically not RAID, because it does not provide fault tolerance. Data is written across multiple drives, so one drive can be reading or writing while the next drive’s read-write head is moving. This makes for faster data access. However, if any one of the drives fails, all content is lost. RAID 1 Also known as disk mirroring. This is a method of producing fault tolerance by writing all data simultaneously to two separate drives.

The terminator can be built into the device and activated/deactivated with a jumper, or it can be a separate block or connector hooked onto the device when termination is required. Termination can be either active or passive. A passive terminator works with resistors driven by the small amount of electricity that travels through the SCSI bus. Active termination uses voltage regulators inside the terminator. Active termination is much better, and you should use it whenever you have fast, wide, or Ultra SCSI devices on the chain and/or more than two SCSI devices on the chain.

Know the default IRQs for COM ports and common devices such as modems, sound cards, disk drives, and so on. Be familiar with Device Manager. Device Manager can display information about the computer’s memory, I/O ports, IRQs being used, and many other PC resources. Know what MSD is. EXE was the MS-DOS equivalent of Device Manager. It was included in both MS-DOS and in Windows 95. Understand how manual resource assignments are set. Manual resource assignments for Plug-and-Play devices are set on the Resources tab of the device’s Properties box.

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