Modern computers (desktops and laptops) contain a large number of interfaces and connectivity options, so that the choice of redundancy strategies is rich enough. Below we list the most common media used for backups.
The second hard drive is probably the most popular backup medium. In the desktop can be placed inside a second drive, but most laptops allow you to install only one internal hard drive, so most likely have to connect an external hard drive via USB or FireWire. There are some advantages: Many models of external hard drives come with software for backup. In addition, such a solution, if we take the 2.5 “model will be very compact. It is unlikely that a laptop would be convenient to carry the massive equipment for 3.5″ hard drives.
ZIP drives and tape drives have long been used for data backup. But the tapes and ZIP drives are not always kept pace with the times. ZIP drives have a maximum capacity of 750 MB, and affordable tape cassettes rarely work with more than 36 or 72 GB (uncompressed data). With the new 2.5 “hard drives with a capacity of 100GB, 160GB and even some models, alternative technologies are not so attractive as before. But tape drives, and ZIP are still actively used on many home computers and office .
Drives are connected via a PC Card slot, PCMCIA. This slot is associated with many users with modems, adapters and other I / O devices, but it can be connected and special drives.
Recordable DVD or CD are great for backups. With regard to notebooks, in which case it would be better if there is a power outlet nearby. In a similar way to backup is a major drawback: high power consumption, since both active and hard drive and optical drive. Furthermore, it should take the help of software or burning software to back up that supports it.
Built-in “card readers” Compact Flash / SD / MMC / MS is in almost all modern laptops and many PCs. They can insert a card to 8GB, but 4GB versions are cheaper. If the backup of large amounts of data such cards will not work, capacity from 4 to 8 GB is enough for storing the OS image, information about the state of the system, and important documents.
Reservations on the network (Windows Backup) for a long time used in organizations, when laptops and PCs unload the backup to a centralized backup server. Home users can go the same way, having unloaded the backup on another computer on the network or network storage. But it will need to use the program to back up that supports a similar function.