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The most important advantage of disk storage over tape storage?
disk storage-> direct data access storage tape storage -> serial data access storage
Name three serial access secondary storage device?
Random Access memory
Serial access secondary storage device?
name one access secondary device?
How does the access time of storage compare with the access time of memory?
access times from memory is 200,000 times faster than access times from storage devices due to the mechanical movement involved.
What is the smallest storage access unit on an ide hard drive?
The smallest storage access unit on an IDE hard drive is a sector.
Is access time of memory is slow compared with the access time of storage?
access times from memory is 200,000 times faster than access times from storage devices due to the mechanical movement involved.
Serial and direct access?
direct access allows you to access the needed record directly with serial access u have to go through all the others before arriving to the desired one
Are optical disk disks are random access storage devices?
floppy disks are read/write storage devices, they are a backing store, a non-volatile long term storage which will not lose data when power is lost.Random access storage is the original term for RAM, the random access memory term was used a a marketing term and has stuck since.Another AnswerYES - floppy disk are Random Access storage devices.
What is DASD?
Direct access storage device
What is the disadvantage of serial access?
None
What are tapes in PC?
Magnetic tapes can be used for data storage with serial access and limited (time-consuming) random access. Historically, such systems were used as inexpensive data storage devices on some personal computers, often using inexpensive audio casette tapes as a physical medium. In professional systems, tapes are used for data backup systems. The backup storage tape uses different tapes and tape drives than those so-called "home computers" of the 1980s used, but they share the same fundamental characteristics: primarily serial access with much slower random access (due to the fact that tape must be unwound and rewound in order to reach a specific location), providing a comparatively large and inexpensive storage capacity. Although tape backups are probably coming out of fashion, they are still in use today, for example for nightly server backups.
Difference between direct and serial access?
Serial access means going through everything one by one, starting at the beginning, until you reach the item you want. Direct access means going straight to the item you want without having to go through other ones. If you wanted to print all the names in a database, using serial access would be fine because you are starting at the first and going right through to the end.In terms of storage units, magnetic tape is a form of serial access, where a disk provides direct access. If you think of a cassette tape, you would have to fast forward or rewind to get to a piece of music you wanted. A CD enables you to go direct to what you want, without having to pass through anything else.
