- Computer has more than 100 updates required archive#
- Computer has more than 100 updates required professional#
In this situation not only would re-writable media be more suitable, but the speed of the back-up device would become far more critical. In contrast, somebody producing 3D computer animation may be re-rendering tens of GB of output on a regular basis to replace previous files in a random-access fashion.
Computer has more than 100 updates required archive#
The photographer's total archive may be hundreds of GB in size, but would only be added to incrementally with previously stored data never being changed. Writing data like photographs to write-once media (such as CD-R or DVD-R as discussed below) would hence be perfectly acceptable.
In other words they will want to keep a permanent record of an historical digital state of the world. A digital photographer, for example, will probably have incremental back-up requirements where each time they complete a shoot they will want to take a back-up of several hundred MB or a few GB of photographs that will subsequently never change. In addition to capacity requirements, whether the data in a user's back-up archive will have to change in a random-access or incremental fashion can be a critical factor in the choice of external storage devices. Knowing what a computer is going to be used for (and of course many computers are used for a variety of purposes) is hence very important when planning storage requirements. Non-compressed video requires even more space - for example 2GB for every minute of standard definition footage, and 9.38GB for each minute of non-compressed 1920x1080 high definition video. For example, an hour of DV format video footage consumes about 12GB of storage. Yet another level of storage higher, if a computer is being used to edit and store video, individual file sizes will probably be measured in hundreds of MB or even a few GB.
Computer has more than 100 updates required professional#
If, however, a computer is being used to store and manipulate digital photographs, then average file sizes will be in the region of several MB in size (and potentially tens of MB if professional digital photography is being conducted). If a computer user is usually only going to create word processor documents and spreadsheets, then most of their files will probably be in the order of a few hundred KB or maybe occasionally a few MB in size. In turn, when deciding on suitable external storage devices, the key questions to be asked should be how much data actually needs to be stored, and whether the external data archive will be subject to random-access or incremental change. These will comprise the storage necessary to keep files internally on their computer, as well as those media required to back-up, transfer and archive data (as also explored in the security section). This means that the storage capacity of two devices labelled as the same size can be different, and which remains an ongoing source of debate within the computer industry.Īny sensible computer user will plan for two categories of storage. This said, whilst this remains true when it comes to a computer's internal RAM and solid state storage devices (like USB memory sticks and flash memory cards), measures of hard disk capacity often take 1MB to be 1,000,000 bytes (not 1,024,768 bytes) and so on. Technically a kilobyte is 1024 bytes, a megabyte 1024 kilobytes, a gigabyte 1024 megabytes, and a terabyte 1024 gigabytes. One byte is one character of information, and is comprised of eight bits (or eight digital 1's or 0's). For more information on how best to back-up your precious data files, you may want to watch the following video:Ĭomputer storage is measured in bytes, kilobytes (KB), megabytes (MB), gigabytes (GB) and increasingly terabytes (TB). This page provides an overview of the most widely available means of storing and backing-up computer data, and in doing so provides a supplement to the hardware and security pages. Key Topics: Requirements Hard Disks RAID DAS Optical Disks Solid State Drives SD Cards Online Storage INTRODUCTION