CompTIA A+ 2
Card Set Information
CompTIA A+ 2
Study for CompTIA
Number of pins for a Parallel ATA (PATA/IDE)
Number of pins for a Seria ATA (SATA/IDE)
Which utility in Windows allows you to partition a hard drive?
Besides harddrives what else is IDE used for?
CD-ROM, DVD, and ZIP
What are drives that support ATA-2 and higher generically refered to as?
enhanced IDE (EIDE)
What technology was ATA-3 introduced with?
ATA Packet Interface (ATAPI)
What was ATA Packet Interface (ATAPI)/ATA-3 introduced to deal with?
CD-ROMS, tape back up, ZIP, etc.
enables the BIOS to recognize these other drives
What was ATA-4 introduced with, and what did it support?
UltraDMA supports transfer modes of up to 33MBps
What transfer modes does ATA-5 support, and what does it need?
needs 80-wire cable
motherboard or IDE controller card must support ATA-5 or revert to ATA-4
What transfer modes does ATA-6 support, and what does it need?
needs 80-wire cable
motherboard or IDE controller card must support ATA-6 or revert to ATA-4
What transfer modes does ATA-7 support, and what does it need?
serial ATA (SATA)
What transfer modes does ATA-8 support, and what does it need?
serial ATA (SATA)
minor revision to ATA-7
A typical motherboard has how many IDE connectors? How many total IDE devices can you connect?
2 devices on each connector = 4 total
How many SCSI drives can you have per interface?
How should you orient the red stripe on an IDE cable if there is no marking for pin 1?
toward the power supply
What do you do if an IDE drive is not automatically detected by the computer?
Configure the drive in the BIOS
On the primary IDE channel, if a single hard disk is attached, its jumper should be set to what?
Single, if available; otherwise Master
What is the BIOS Setup option DMA or programmed input/output (PIO) used for? For what are those settings unnecessary or undesirable?
Improving drive performance by allowing the drive to write directly to RAM, bypassing the CPU
modern drives that support UltraDMA
What does SCSI stand for?
Small computer system interface
Eight-bit SCSI-1 and SCSI-2 internal devices use what type of cable?
a 50-pin ribbon SCSI A cable
Sixteen-bit SCSI internal devices use what type of cable?
SCSI P cable with 68 wires and a DB-style connector
What is the 80-pin internal connector used for some high end SCSI devices called?
External SCSI connectors
: 50-pin Centronics connector
: 25-, 50-, or 68-pin femal DB-style connector
: 68- or 80-pin femal DB-style connector
How do you configure SCSI devices?
Assign them a number by using jumpers or DIP switches
What does a terminating resistor pack (terminator) do?
Must be installed at both ends of the bus to keep the signals "on the bus."
Which terminator works with resistors driven by the small amout of electricity that travels through the SCSI bus?
Which termination uses voltage regulators inside the terminator?
When connecting internal-only or external-only SCSI devices how do you install the terminating resistors?
Terminated the last drive in the chain including the host adapter
When connecting internal and external SCSI devices how do you install the terminating resistors?
Terminate the last drive in each chain but leave the host adaptor unterminated.
Which devices should get higher SCSI priority?
Slower devices so that can access the bus whenever they need it.
Which SCSI ID is the highest priority no matter the bus width?
SCSI ID priority in highest to lowest
: 7 through 0
: 7 through 0, 15 through 8
: 7 through 0, 15 through 8, 23 through 16, 31 through 24
Which SCSI ID should the bootable (or first) hard drive be set to?
Which SCSI ID should the CD-ROM drive be set to?
What is RAID, and what is it used for?
Redundant Array of Independed Disks
Combines the storage power of more than one hard disk for increased performance or fault-tolerance
What is RAID 0 or
Writing data across multiple drives for faster data access.
If one drive fails then all data is lost
What is RAID 1 or
Produces fault tolerance by simultaneousley writing data to two drives.
Does not help with speed and doubles cost.
What is RAID 5?
Uses a parity block distributed across all the drives in the array, in addition to striping the ata across them.
If one drive fails, the parity info can be used to recover what was on the failed drive.
Requires a minimum of 3 drives.
What kind of cable is a traditional VGA video cable?
What does DVI stand for?
Digital Video Interface
What is the most important component to have when installing a new video display device?
The correct driver
Discharging the high-voltage charge on a CRT monitor using a high voltage probe
: attach the alligator clip to the ground (round pin on the power cord)
: slip the probe needle under the high-voltage cup on the monitor
: Watch the gauge spike to 15,000 and slowly reduce to 0
: remove probe and begin service
Basic Aspects of Troubleshooting
: Define the problem
: Check the simple stuff first
: Check to see if it's user error
: Restart the computer
: Determine if the problem is hardware or software
: If hardware, determine which component is failing
: Check service info sources
: If it ain't broke...
: Ask for help
Define the Problem
Can you show me the problem?
How often does this happen?
Has any new hardware been installed recently?
Have any other changes been made to the computer recently?
Do the chips and cable need to be reseated?
Every computer has a diagnostic program built into ist BIOS called what?
POST, power-on self-test
Which command resets the modem?
To fix a bad pwer supply in a desktop PC, you should do what?
Remove and replace the entire power supply box
What two devices are commonly used to cool components within a PC?
fans and heat sinks
What can you used to clean computer and monitor cases?
mild soap and water and a clean, lint-free cloth
What can you use to clean a monitor screen?
glass cleaner designed specifically for monitors and a soft cloth
What can you used to clean a keyboard?
towelettes designed for use with computers
soaking in demineralized water (let dry 48 hrs)
What can you used to clean the electronic connectors?
distilled, denatured isopropyl alcohol
How can you remove dust and dirt from inside a computer?
Use compressed air to blow dust from inside the computer
Aside from adequate ventilation, what percent humidity should you maintain for computers?
What dot discolored areas on a board mean?
power surge or overclocking
What should you use to clean up toner?
a special vacuum designed for electronics that does not product ESD and has a fine filter
magnet for cleaning toner off of clothing
How many bits of data does a high speed serial cable carry simultaneously in a single direction?