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Winchester Drive

By pamjam ·
Is a Winchester Drive an example of a sequential access storage device?

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Winchester Drive

by daveseng In reply to Winchester Drive

A Winchester drive is simply an "old" term for a hard drive. A hard drive is NOT considered to be a sequential access device.

Dave Seng

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Winchester Drive

by pamjam In reply to Winchester Drive

The question was auto-closed by TechRepublic

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Winchester Drive

by Lo In reply to Winchester Drive

Hi - First Answer is correct.

A device is Sequential when the 2nd, 3rd, 4th, etc. 'piece' of data can't be read until the preceeding 'pieces' of data have been read.

Examples are Magnetic Tape (there are (were?) Magnetic Tape mediaa that were Random Access), Paper Tape, IBM Punch Cards, possibly data on a serial port or network connection.

Disk Drives (Hard Disk, Zip Drives, etc.) are termed Random Access Devices. One reads 'index' or other access data that allows access to any piece of data.

An example:
A data file with 10,000,000 bytes of data, stored on a disk and magnetic tape. To read the 9,999,995th byte of data on a tape (or other sequential device), the application will need to read and discard 9,999,994 bytes of data. To read on a random access device, it would be a read or two to obtain access data and 1 read to obtain the data. Depending on how the file is organized, blocked, etc. the access data reads are handled by function that are part of the compiler (the application performs file open functions and requests the data). This is a bit over simplified but ... lo

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Winchester Drive

by pamjam In reply to Winchester Drive

The question was auto-closed by TechRepublic

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Winchester Drive

by pamjam In reply to Winchester Drive

This question was auto closed due to inactivity

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