HDD Printed circuit board (PCB) with board number BF41-00300A is usually used on these Samsung hard disk drives: Samsung 2.5″ Hard Drive HDD HM641JX /VP4 Mini USB Hard Drive Samsung 2.5″ Hard Drive HDD HM321JX /VP4 Mini USB Hard Drive The BF41-00300A Samsung PCB repair process can usually be divided into 2 steps: find a…
I/O
Input/Output. An operation, program, or device that that transfers data to or from a computer or other device.
IcePack™
3.5-inch mounting frame with a built-in heat sink that keeps the 2.5-inch WD VelociRaptor extra cool when installed in a 3.5-inch drive bay.
IDE
Integrated drive electronics. A technology in which interface controller electronics are incorporated into the design of the hard drive rather than into a separate controller. See also PATA.
index pulse signal
A digital pulse signal indicating the beginning of a disk revolution. An embedded servo pattern or other prerecorded information is present on the disk following the index.
initialization
See low-level formatting.
initiator
A device in control of a SCSI bus that sends commands to a target. Most SCSI devices have a fixed role as either initiator or target; however, some devices can assume both roles.
input
Incoming data that a computer processes, such as user-issued commands.
IntelliPark™
Delivers lower power consumption by automatically unloading the heads during idle to reduce aerodynamic drag.
IntelliPower™
A fine-tuned balance of spin speed, transfer rate, and caching algorithms designed to deliver both significant power savings and solid performance.
IntelliSeek™
WD AV feature that optimizes seek speeds to lower power consumption, noise, and vibration.
interface
A hardware or software protocol to manage the exchange of data between a device and a computer; the most common ones are PATA (also known as EIDE), SATA, and SCSI.
interface controller
A chip or circuit that translates computer data and commands into a form usable by a hard drive and that controls data transfers between buffer and host. See also disk controller and disk drive controller.
interleave
The arrangement of sectors on a track.
interrupt
A signal sent by a subsystem to the CPU when a process either was completed or could not be completed.
IP
Internet Protocol. A system that controls how data messages are separated into packets, routed from the sender, and reassembled at the destination.
IP address
A 32-bit, binary number that uniquely identifies a computer connected to the Internet.
ISA
Industry Standard Architecture. The standard 16-bit AT bus for the PC/AT system. ISA was the only industry standard bus for PCs until the recent release of Peripheral Component Interconnect (PCI).
Case:The operating system of the customer is: Winodws Server 2003, the server is Lenovo server, a total of 5 hard disks, each 1T capacity, the RAID0 made of 2 hard disks, the other three hard disk RAID5, the server suddenly powers off, raid information is lost.The system could not start, and the customer returned to…
Case:The database file on the customer server cannot be copied, prompting “data redundancy errors””. Solution:Our engineers test the hard disk to the hard disk on the special work machine. There are a lot of bad sectors in the sector location where the database is located.The extraction of the library document reported an error 9001
Case:The client’s computer was turned off during use, and the hard disk was not recognized after turning on the next day. Solution:The hard disk is a 3.5 -inch desktop hard disk of Hitachi, with a capacity of 320GB. It is found that the disk cannot be reset after power -on during power detection, and a…
Hello, So I want to erase the data off my hard drive from an HP pavilion so I can use it in my upcoming computer build to save money and I was wondering what are ways or programs and erase a drive. Thanks. You may already know that “deleting” a file does nothing of the…
HDD Printed circuit board (PCB) with board number 2060-771945-001 is usually used on these Western Digital hard disk drives: WD20EFRX-68EUZN0, DCM HHRNNTJCHB, Western Digital 2TB SATA 3.5 Hard Drive; WD40EURX-633GY0, DCM HARNHTJMAB, Western Digital 4TB SATA 3.5 Hard Drive; WD30EZRX-00SPEB0, DCM HGNNHTJMGB, Western Digital 3TB SATA 3.5 Hard Drive; WD30EZRX-22D8PB0, DCM HHRNHT2CH, Western Digital 3TB…
Most laptop computers are designed to give the owner the ability to replace the internal hard disc drive. The computer usually has an access cover or door on the bottom side of the system. There are systems that are not designed for user access. Sometimes these systems have warnings about voiding the system warranty. Be sure to study your system’s documentation to learn about upgrade policies and methods.
Like desktop computers, laptop computers have one of two possible hard disc drive interface: SATA and ATA (also called IDE or PATA). The type of hard drive you select must match the system because they are not interchangeable.
Electrostatic discharge is a risk to electronic components. To help prevent static discharge, observe the following precautions:
Laptop hard disc drives are thin and delicate. For this reason, always hold the drive on the sides. Do not apply pressure to the top or squeeze the drive.
Some laptop motherboards use a small adapter part to connect the disc drive to the system. If an old drive was removed, be sure to check if an adapter is still attached to the drive. If so, carefully remove and transfer the adapter to the new drive. Make sure that the pins and connectors are properly aligned when mounting the drive to the motherboard.
If your system design uses screws to mount the hard drive, be sure not to over tighten the screws. Fingertip tight on the screwdriver is all that is necessary to secure the drive. Too much screw pressure can cause the disc drive to go out of alignment and possibly ruin the drive.
You will need to boot from the Operating System Setup CD when preparing a new installation of the OS. Many laptop computers are brand name systems with recommended OS recovery procedures. Again, consult your system documentation for more information. Otherwise, the OS installation procedure is the same as for any other computer.
Note: It is important to install the OS while connected to AC power. Battery depletion during the OS setup is known to corrupt the installation.
After the installation is complete, please practice safe handling of your system and hard disc drive. First, always provide clear and open access to the air-cooling vents and fan. Laptop computers depend on the cooling vents for the overall health of the system and disc drive. Second, using the disc activity LED as a guide, try not moving the computer when the hard disc is highly active. If you must move the computer during this time, go easy and set the system down softly. While mobile hard drive are designed with much higher G-Force ratings while operating, protective habits are a good idea.
Since digital information is a stream of ones and zeros, hard disks store information in the form of magnetic pulses. In order for the PC’s data to be stored on the hard disk, therefore, it must be converted to magnetic information. When it is read from the disk, it must be converted back to digital information. This work is done by the integrated controller built into the hard drive, in combination with sense and amplification circuits that are used to interpret the weak signals read from the platters themselves.
In short, the disk controller consists of a ROM that embedded some disk commands to translate and implement some write and read orders from a PC, it is like a disk controller chip, and a little glue to make it all work.
I used to imagine that a Hard disk controller is a talented translator who lives in a chip of PCB, translating between the magnet signal of ones of HDD and zeros and commands from PC.
Modern disk controllers are integrated into the disk drive. For example, disks called “SCSI disks” have built-in SCSI controllers. In the past, before most SCSI controller functionality was implemented in a single chip, separate SCSI controllers interfaced disks to the SCSI bus.
The most common types of interfaces provided nowadays by a disk controller are ATA (IDE) and Serial ATA for home use. High-end disks use SCSI, Fibre Channel or Serial Attached SCSI.
A Computer Forensics Investigator is trained in combating crimes ranging from crimes against children to file system recovery on computers that have been damaged or hacked. The Computer Forensics Investigator, also known as a Computer Forensics Specialist, recovers data from digital media that will be used in criminal prosecution. Digital media refers to all methods of electronic data storage and transfer devices including computers, laptops, PDAs and the images, spreadsheets and other types of files stored on these devices. Once a Computer Forensics Investigator retrieves the necessary information they will prepare very detailed and technical written reports on the collected data that will later be presented in court. Part of the Computer Forensics Investigator job description is to testify in court regarding the information they had recovered and the methods they used to recover that information.
Computer Forensics consulting firms or Freelance Computer Forensic Investigators are also hired by large corporations to test the information systems security they have in place. Computer Forensic Specialists will mimic how a malicious hacker might attempt to gain access to a corporation’s computer network.
Requirements and Qualifications to Become a Computer Forensics Investigator
Being that computer forensics is such a new field there has not been a consistent range of requirements or qualifications set across agencies. Many individuals gained their training and skills in computer forensics by working in law enforcement or the military. Now that many colleges are offering computer forensics degrees and related information systems – security degrees/cyber crime degrees, an education has become a minimum requirement to stay competitive in the industry.
