Case:Customer reaction U disk data is lost. Solution:After detecting pine cypress, it was found that the U disk was scrolled and wrote, which was the same as four sectors. Many four sectors were continuous and the same. Most of the sectors were the same.Find some files, rewrite the catalog of the transition virtual hard disk,…
Case:During the normal use of the hard disk, the sound of the sudden crash appears to be charged Solution:Because the original hard disk USB interface is troublesome, we modify the circuit to become a SATA disk for detection, and the fault is still.In this case, the customer agreed that we opened it and looked at…
By making a disk image of your computer you can protect your data and be up and running in case of a virus attack or a hard disk failure. You can also move the whole system to other computers by having your information duplicated. This is called hard disk cloning.
In this way you can set-up new computers with a set of ready data and software configurations really easy and fast. Actually there is no pure hard disk image backup software in the market.What these products do is they copy single hard disk partitions. Of course if the hard disk is composed of just one partition then it makes a copy of the whole disk image in the transfer. You may also look at more advanced products specially developed for partition copy and disk manipulation! One benefit by having a image from the hard disk on a backup is that in case of hard disk failure it is often a very quick procedure to restore the data from the backup. If the hard disk backup software is equipped with a free rescue start-up disk utility, and most of them are, then you do not need to install the operating system and backup software before you can copy and restore your hard drive image back to the hard drive.
A new way of magnetic recording using heat will allow data processing hundreds of times faster than by current hard drive technology, – British researchers say.
International research led by the physics department at the University of York found heat could be used to record information onto magnetic media at a much faster rate than current technologies, a York release said Tuesday.
“Instead of using a magnetic field to record information on a magnetic medium, we harnessed much stronger internal forces and recorded information using only heat,” York physicist Thomas Ostler said.
“This revolutionary method allows the recording of Terabytes (thousands of Gigabytes) of information per second, hundreds of times faster than present hard drive technology. As there is no need for a magnetic field, there is also less energy consumption.”
Until now it has been believed that in order to record one bit of information — by inverting the poles in a magnetic medium — there was a need to apply an external magnetic field.
The researchers demonstrated the positions of the poles of a magnet can be inverted by an ultrashort heat pulse, harnessing the power of much stronger internal forces.
“For centuries it has been believed that heat can only destroy the magnetic order, now we have successfully demonstrated that it can, in fact, be a sufficient stimulus for recording information on a magnetic medium.” ” said Alexey Kimel of the Radboud University Nijmegen in the Netherlands.
Case:Customers took several important videos with their mobile phones, involving evidence of a case.Always saved on the mobile TF card, one day when the card is removed and inserted on the card reader to connect to the computer, you can’t find the card.When inserting it back, the storage card is damaged and cannot be read.Customers…
HDD Printed circuit board (PCB) with board number 100428473 is usually used on these Seagate hard disk drives: ST3160815AS, 9RX, TK, PN 9CY132-042, FW 3.BQA, Seagate 160GB SATA 3.5 Hard Drive; ST380815AS, 9RW, TK, PN 9CY131-021, FW 3.CHH, Seagate 80GB SATA 3.5 Hard Drive; ST380815AS, 5QZ, WU, PN 9CY131-305, FW 3.AAD, Seagate 80GB SATA 3.5…
Case:The customer is a 1T desktop hard disk for Hitachi. After turning on, there are abnormal noises, not recognizing the disk, and the magnetic head is detected. Solution:The engineer replaced the magnetic head in the 100 -level dust -free workshop, and finally successfully restored the data required by the customer.
Case:A network technology company sent a server, the original No. 0 hard disk fault light of the server was on, and a new hard disk could not automatically reBuild. Raid Config found the 2nd hard disk off line, put it on the new hard disk, and put the original 0 No. 0The hard disk is…
CMOS Setup
A program supplied in most systems that allows you to configure internal and external devices.
Cable Select (CSEL)
An alternative option which can be used in place of setting Master/Slave jumpers in the designation of drives in a dual drive configuration. Master/Slave designation is based on the position of the drives relative to the cable. Special cabling is required by the system manufacturer to selectively ground the CSEL signal on one of the IDE cable connectors. For example, when one of the drives is connected to the grounded CSEL conductor, it configures itself as the Master. When the second drive is connected to the other connector, on which CSEL is not grounded, it becomes the slave. This eliminates the need for unique jumpering configurations between the Master and Slave drives.
Cache
High-speed RAM used as a buffer between the CPU and a hard drive. The cache retains recently accessed information to speed up subsequent accesses to the same data. When data is read from or written to disk, a copy is saved in the cache, along with the associated disk address. The cache monitors the addresses of subsequent read operations to see if the required data is already in the cache. If it is, the drive returns the data immediately. If it is not in the cache, then it is fetched from the disk and saved in the cache.
Capacity
The amount of information, measured in bytes, that can be stored on a hard drive. Also known as storage capacity.
Central Processing Unit (CPU)
The main processing chip of a computer. The CPU interprets and executes the actual computing tasks, and has the ability to transfer information to and from other resources over the computer’s main data-transfer path, the bus.
Channel
A connection or socket on the motherboard or controller card. A motherboard may have one or two channels (primary and secondary). If your motherboard has only one channel, you may need to add a controller card to create a secondary channel.
Channel Assembly
In the computer industry, the final assembly of a system by a distributor or reseller from kits provided by the manufacturer and from components shipped directly to the assembler by subsystem makers.
Clean Room
An environmentally controlled, dust-free, assembly or repair facility in which hard drives are assembled or opened for internal servicing.
Cluster
A hard disk term that refers to a group of sectors. A cluster is considered an allocation unit. At least one cluster is allocated to each file, regardless of the file’s size, that is stored in the DOS environment. The cluster size increases with the partition size determined during formatting. With a 1024 MB partition, the cluster size is 32 KB. Each file stored consumes 32 KB of storage space, no matter how small the file. Create multiple, smaller partitions to avoid wasting space on small files. (This definition applies to FAT16).
Command Aging
A SCSI feature that prevents the command reordering algorithm from keeping I/O processes waiting in the command queue for extended periods of time.
Command Queuing
A feature that enables the drive to receive I/O processes from one or more initiators and execute them in an optimum sequence.
Command Reordering
A feature that allows the drive to reorder I/O processes in the command queue, which results in minimizing the seek time and rotational latency and thus increases throughput.
Controller
A device that transfers information between the computer and peripheral devices. The controller (or “control unit”) acts as a traffic manager. See also disk controller, interface controller, and disk drive controller.
Controller Card
An adapter with the control electronics for one or more hard drives. Usually installed in a bus slot in the computer.
Correctable Error
An error that the drive can correct by using Error Detection and Correction schemes.
Customer Configuration Code (CCC)
A firmware revision tracking code that defines a major product change. This number increments as form, fit or function changes are implemented. The CCC code guarantees that the correct revision of drive product is provided to the customer.
Cyclic Redundancy Check (CRC)
Data stored or transmitted with data to detect corruption. By calculating the CRC data and comparing it to the original data sent, the receiver can detect some types of transmission errors.
Cylinder
The cylindrical surface formed by identical track numbers on vertically stacked disks.
Cylinder, Head, Sector (CHS) Addressing
A method of referencing the sectors on a drive as a collection of unique cylinder, head and sector addresses. Each block on the drive will have a unique cylinder, head and sector address.
Case:Customers responded that the computer did not recognize the disk and could not enter the system. The hard disk was the Seagate ST3500418as, which did not take long. Solution:After taking over the hard disk, the hard disk professional detection tool was used to find that the hard disk was normal, that is, it was impossible…
