Part Number: DSRVH-NA*
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Brand: DEC (Digital Equipment Corporation)
Description: Refurbished DSRVHNA DECSERVER 90M4MB MEM1MB FLASH 30 Day Warranty
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Showing posts with label Flash. Show all posts
Showing posts with label Flash. Show all posts
Sunday, February 19, 2012
Sunday, December 25, 2011
ROM and its role in computer systems
ROM stands for Read only memory. ROM devices are usually those memory modules which have been fabricated with data permanently. But in most modern ROMs the data stored can be modified slowly and is difficult when compared to other memories.
So, ROM chips are used in places where there is a very little need for the modification of the data stored. ROM is mostly used in the development of firmware memory modules as firmware does not need frequent updates.
Floppy, CDs and DVDs are also a type of ROM although erasable CDs and DVDs exist. But to modify data in a rewritable CD or DVD, the disk should be completely erased and then modified unlike Hard Drives in which the data can be modified without having to erase the entire content. The erasable ROM devices are in their highest form with the NAND flash memory which is being used as a storage substitute in many applications.
So, ROM chips are used in places where there is a very little need for the modification of the data stored. ROM is mostly used in the development of firmware memory modules as firmware does not need frequent updates.
Floppy, CDs and DVDs are also a type of ROM although erasable CDs and DVDs exist. But to modify data in a rewritable CD or DVD, the disk should be completely erased and then modified unlike Hard Drives in which the data can be modified without having to erase the entire content. The erasable ROM devices are in their highest form with the NAND flash memory which is being used as a storage substitute in many applications.
Types of Computer Memories
We have come a long way from the days when heavy tape drives were used to store information to hand held little devices available today. Computer memory is nothing but the collection of data on physical devices in a digital format i:e 0's and 1's.
To classify memory, there are two types broadly, one is volatile and the other is non volatile. As their name suggests, volatile memory can store information only till it is supplied with electric energy and non volatile memory can retain the information even after the supply is disconnected.
In present day computers, RAM is a volatile but high speed memory, while Hard Drives are non volatile but low speed memory. There are many types of volatile and non volatile memories that have been developed. Among them, Different types of RAM like SDRAM, DDR, DDR2, DDR3 etc stand for volatile and flash drives, hard disks and optical storage devices are a few types that come under the non volatile category.
To classify memory, there are two types broadly, one is volatile and the other is non volatile. As their name suggests, volatile memory can store information only till it is supplied with electric energy and non volatile memory can retain the information even after the supply is disconnected.
In present day computers, RAM is a volatile but high speed memory, while Hard Drives are non volatile but low speed memory. There are many types of volatile and non volatile memories that have been developed. Among them, Different types of RAM like SDRAM, DDR, DDR2, DDR3 etc stand for volatile and flash drives, hard disks and optical storage devices are a few types that come under the non volatile category.
Monday, December 19, 2011
Flash Memory And It's Use
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Flash memory is a kind of computer storage media that is also non-volatile in nature. It consists of a number of memory cells where the information is stored. Usually, in each cell just one bit of data is stored. But newer flash memories are available that are capable of storing more than one bit of information.
There are various types of flash memories with different capacity and transfer rates.
Flash memory is reliable for data storage in various electronic devices such as computers, printers, game consoles and digital cameras. BIOS chips in motherboards, Compact Flash, Smart Media and Memory Stick for digital cameras and different memory cards for game consoles use flash memory. Nowadays, flash memory is also known as solid state storage device that is used in a similar way we use a hard drive.
By: Raihan
Flash memory is a kind of computer storage media that is also non-volatile in nature. It consists of a number of memory cells where the information is stored. Usually, in each cell just one bit of data is stored. But newer flash memories are available that are capable of storing more than one bit of information.
There are various types of flash memories with different capacity and transfer rates.
Flash memory is reliable for data storage in various electronic devices such as computers, printers, game consoles and digital cameras. BIOS chips in motherboards, Compact Flash, Smart Media and Memory Stick for digital cameras and different memory cards for game consoles use flash memory. Nowadays, flash memory is also known as solid state storage device that is used in a similar way we use a hard drive.
By: Raihan
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