Define :Azimuth What is Azimuth
Azimuth
The angular distance in the horizontal plane of a track usually measured as an angle from true track location.
Friday, August 29, 2008
Define :Average Access Time What is Average Access Time
Average Access Time
The average all possible combinations of seek lengths.
The average all possible combinations of seek lengths.
Define : Auxiliary Memory - What is Auxiliary Memory
Define : Auxiliary Memory - What is Auxiliary Memory
Auxiliary Memory
Memory other than main (RAM) memory. Usually a form of mass storage such as a hard disc drive, tape backup drive, or CD-ROM. Typically, auxiliary memory is non-volatile; meaning that the data stored in auxiliary memory will not be erased when power is removed.
Auxiliary Memory
Memory other than main (RAM) memory. Usually a form of mass storage such as a hard disc drive, tape backup drive, or CD-ROM. Typically, auxiliary memory is non-volatile; meaning that the data stored in auxiliary memory will not be erased when power is removed.
Define:Auto-park -What is Auto-park
Define:Auto-park -What is Auto-park
Auto-park
An automatic process where the heads are moved to a location of the disc where data is not. This process happens when power is removed from the drive.
Auto-park
An automatic process where the heads are moved to a location of the disc where data is not. This process happens when power is removed from the drive.
Define :Automatic Backup of Files -What isAutomatic Backup of Files
Define :Automatic Backup of Files -What isAutomatic Backup of Files
Automatic Backup of Files
An option setting that instructs the system to make a copy of an original before it replaces it with a newer saved version. This provides the security to make changes to a file without worrying about accidentally destroying it because there is always another copy. However, files take twice the disc space and only the current and one previous revision are saved.
Automatic Backup of Files
An option setting that instructs the system to make a copy of an original before it replaces it with a newer saved version. This provides the security to make changes to a file without worrying about accidentally destroying it because there is always another copy. However, files take twice the disc space and only the current and one previous revision are saved.
Define :ATAPI What is Advanced Technology Attachment Packet Interface
Define :ATAPI What is Advanced Technology Attachment Packet Interface
ATAPI
Advanced Technology Attachment Packet Interface. ATAPI is a command protocol used for accessing ATA (IDE) peripheral devices. ATAPI is widely used on CD-ROM and tape backup units attached to ATA buses.
ATAPI
Advanced Technology Attachment Packet Interface. ATAPI is a command protocol used for accessing ATA (IDE) peripheral devices. ATAPI is widely used on CD-ROM and tape backup units attached to ATA buses.
Define: ATA What is ATA
Define: ATA What is ATA
ATA
Advanced Technology Attachment. ATA is the most common interface used in consumer and corporate PCs today because of its lower cost and very favorable performance. ATA is also known as IDE (Integrated Drive Electronics) in the disc drive industry.
ATA
Advanced Technology Attachment. ATA is the most common interface used in consumer and corporate PCs today because of its lower cost and very favorable performance. ATA is also known as IDE (Integrated Drive Electronics) in the disc drive industry.
What is "Asynchronous Data " Define:Asynchronous Data
Define:Asynchronous Data Asynchronous Data
Data can be sent across a bus in two ways: synchronous and asynchronous. Asynchronous data differs from synchronous data in that it does not require precise timing. While synchronous data is dependent upon a precisely timed, strobe-like clock pulse to determine the beginning and end of a data stream, asynchronous data sends a beginning of data and an end of data tag with each data transfer, thus allowing different time intervals between transmitted bits of data. For this reason, asynchronous data transfers are generally faster than synchronous data transfers are.
Data can be sent across a bus in two ways: synchronous and asynchronous. Asynchronous data differs from synchronous data in that it does not require precise timing. While synchronous data is dependent upon a precisely timed, strobe-like clock pulse to determine the beginning and end of a data stream, asynchronous data sends a beginning of data and an end of data tag with each data transfer, thus allowing different time intervals between transmitted bits of data. For this reason, asynchronous data transfers are generally faster than synchronous data transfers are.
Define "ASPI "Advanced SCSI Programming Interface
What is Advanced SCSI Programming Interface
ASPI
Advanced SCSI Programming Interface. ASPI is a protocol developed by Adaptec which is used by some SCSI application software to communicate with SCSI adapters.
ASPI
Advanced SCSI Programming Interface. ASPI is a protocol developed by Adaptec which is used by some SCSI application software to communicate with SCSI adapters.
Define ASIC (Application Specific Integrated Circuit)
ASIC
Application Specific Integrated Circuit. Connects existing circuitry and building blocks in new ways. A custom "mask" is applied to a generic integrated circuit (IC), allowing the manufacturer to customize the IC for a specific purpose. ASICs are much less costly and time-consuming to produce than custom ICs.
Application Specific Integrated Circuit. Connects existing circuitry and building blocks in new ways. A custom "mask" is applied to a generic integrated circuit (IC), allowing the manufacturer to customize the IC for a specific purpose. ASICs are much less costly and time-consuming to produce than custom ICs.
Define Advanced SCSI Architecture II (ASA II)
Define Advanced SCSI Architecture II (ASA II)
ASA II
Advanced SCSI Architecture II (ASA II) is Seagate’s proprietary method of improving performance of it’s SCSI disc drives. ASA II firmware contains features that optimize the processing of SCSI commands within the disc drive. Rotational-position seek/sort is an example of one of these features.
ASA II
Advanced SCSI Architecture II (ASA II) is Seagate’s proprietary method of improving performance of it’s SCSI disc drives. ASA II firmware contains features that optimize the processing of SCSI commands within the disc drive. Rotational-position seek/sort is an example of one of these features.
Define ASA ( Advanced SCSI Architecture )
Define ASA ( Advanced SCSI Architecture ) -What is ASA ( Advanced SCSI Architecture )
ASA
Advanced SCSI Architecture. Seagate's ASA chipset technology streamlines the internal architecture of a disc drive, dramatically increasing drive performance. ASA is fully compatible with all industry standard SCSI devices.
ASA
Advanced SCSI Architecture. Seagate's ASA chipset technology streamlines the internal architecture of a disc drive, dramatically increasing drive performance. ASA is fully compatible with all industry standard SCSI devices.
Define :Array -What is Array
Define :Array -What is Array
Array
A group of elements combined to form a complete unit. A RAID array is a common use for this term in the disc drive industry.
Array
A group of elements combined to form a complete unit. A RAID array is a common use for this term in the disc drive industry.
Define:Areal Density - What is Areal Density
Define:Areal Density - What is Areal Density
Areal Density
This term is commonly used to describe the amount of data that can physically be stored in a given amount of space on a disc platter inside a disc drive. Areal Density equals bit density, or bits per inch (BPI), multiplied by tracks per inch (TPI).
Areal Density
This term is commonly used to describe the amount of data that can physically be stored in a given amount of space on a disc platter inside a disc drive. Areal Density equals bit density, or bits per inch (BPI), multiplied by tracks per inch (TPI).
Define :Application Program - What is "Application Program"
Define :Application Program - What is "Application Program"
Application Program
A type of program that performs a task for the user, such as word processing or accounting.
Application Program
A type of program that performs a task for the user, such as word processing or accounting.
Define "Apple Talk "- What is Apple Talk
Define "Apple Talk " -What is "Apple Talk "
Apple Talk
Apple networking protocol with data-transfer rate of 230 Kbits per second.
Apple Talk
Apple networking protocol with data-transfer rate of 230 Kbits per second.
Define "Append " - What is "Append "
Define "Append "in data storage
Append
When data is written after previously recorded data, as opposed to overwriting the previously recorded data.
Append
When data is written after previously recorded data, as opposed to overwriting the previously recorded data.
Define "Algorithm "-What it means by Algorithm
Define Algorithm - What it mean by Algorithm
Algorithm
A formula or set of rules for solving a particular problem. A set of rules for transforming the logical representation of data.
Algorithm
A formula or set of rules for solving a particular problem. A set of rules for transforming the logical representation of data.
Define "Address" in data storage or data access
Define Address - What is "Address "
Address
A specific physical location where a unit of data is stored. To enable the system to return to the same area on a disc, each area is given a unique address consisting of three components: cylinder, head, and sector. Cylinder addressing is accomplished by assigning numbers to the disc’s surface concentric circles (cylinders). The cylinder number specifies the radial address component of the data area. Head addressing is accomplished by vertically numbering the disc surfaces, usually starting with the bottom-most disc data surface. Sector addressing is accomplished by numbering the data records (sectors) from an index that defines the reference angular position of the discs. Index records are then counted by reading their address marks. For example, the controller might send the binary equivalent of the decimal number 610150 to instruct the drive to access data at cylinder 610, sector 15, and head 0.
Address
A specific physical location where a unit of data is stored. To enable the system to return to the same area on a disc, each area is given a unique address consisting of three components: cylinder, head, and sector. Cylinder addressing is accomplished by assigning numbers to the disc’s surface concentric circles (cylinders). The cylinder number specifies the radial address component of the data area. Head addressing is accomplished by vertically numbering the disc surfaces, usually starting with the bottom-most disc data surface. Sector addressing is accomplished by numbering the data records (sectors) from an index that defines the reference angular position of the discs. Index records are then counted by reading their address marks. For example, the controller might send the binary equivalent of the decimal number 610150 to instruct the drive to access data at cylinder 610, sector 15, and head 0.
Adaptive Caching -What is Adaptive Caching
Define Adaptive Caching - What it means by Adaptive Caching
Adaptive Caching
Allows the drive to tune its internal cache (number of segments and segment size) to best suit the system's needs.
Adaptive Caching
Allows the drive to tune its internal cache (number of segments and segment size) to best suit the system's needs.
Actuator - What it mean by Actuator
What it mean by Actuator -
Actuator
A mechanism that moves the heads to the cylinder being accessed.
Actuator
A mechanism that moves the heads to the cylinder being accessed.
Access Time - Define Access Time
What it means by Access Time in Data storage
Access Time
1) The time required to seek a location on a disc. 2) The amount of time to read or write to a memory location.
Access Time
1) The time required to seek a location on a disc. 2) The amount of time to read or write to a memory location.
Access -What "Access " in data storage
Access -What "Access "means in data storage
Access
The process of obtaining data from, or placing data into a disc storage device, register, or RAM (random access memory) location.
Access
The process of obtaining data from, or placing data into a disc storage device, register, or RAM (random access memory) location.
A/V Professional ,Who is A/V Professional
A/V Professional -Who is A/V Professional
To meet the demands of the digital A/V storage industry, Seagate Barracuda, Cheetah and Elite drives offer not only industry-leading per-formance in capacity and speed, but also embedded servo technology to ensure uninterrupted data transfers. Since 1995, Seagate has also collaborated with industry partners to offer the A/V Professional program. Through this partnership, it is possi-ble for Seagate customers to purchase drives preconfigured to meet the demands of the high-end A/V production market. Through changes in the SCSI sense mode pages Seagate A/V Professional partners can customize the characteristics of the drive to meet the demands of a specific application. This policy offers Seagate’s customers a clear ad-vantage over the one configuration fits all approach to the A/V market.
To meet the demands of the digital A/V storage industry, Seagate Barracuda, Cheetah and Elite drives offer not only industry-leading per-formance in capacity and speed, but also embedded servo technology to ensure uninterrupted data transfers. Since 1995, Seagate has also collaborated with industry partners to offer the A/V Professional program. Through this partnership, it is possi-ble for Seagate customers to purchase drives preconfigured to meet the demands of the high-end A/V production market. Through changes in the SCSI sense mode pages Seagate A/V Professional partners can customize the characteristics of the drive to meet the demands of a specific application. This policy offers Seagate’s customers a clear ad-vantage over the one configuration fits all approach to the A/V market.
A/V Applications ,What is A/V Applications mean
A/V Applications - What does it mean
Applications that deal with transferring large sequentially stored files, such as Audio or Video. With these files, transfer speed is a primary factor.
Go it - A/V Applications
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