Techinfoblogger:- backup and types of backup

-

Backup’s and types of backup



In information technology, a backup, or the process of backing up, refers to the copying and archiving of computer data so it may be used to restore the original after a data loss event. The verb form is to back up in two words, whereas the noun is backup. Backups have two distinct purposes. The primary purpose is to recover data after its loss, be it by data deletion or corruption. Data loss can be a common experience of computer users; a 2008 survey found that 66% of respondents had lost files on their home PC The secondary purpose of backups is to recover data from an earlier time, according to a user-defined data retention policy, typically configured within a backup application for how long copies of data are required. Though backups represent a simple form of disaster recovery, and should be part of any disaster recovery plan, backups by themselves should not be considered a complete disaster recovery plan. One reason for this is that not all backup systems are able to reconstitute a computer system or other complex configuration such as a computer cluster, active directory server, or database server by simply restoring data from a backup.


Types of backups

·      Full Backup
·      Incremental Backup
·      Differential Backup
·      Copy Backup



Full Backup-
A repository of this type contains complete system images taken at one or more specific points in time. This technology is frequently used by computer technicians to record known good configurations. Imaging is generally more useful for deploying a standard configuration to many systems rather than as a tool for making ongoing backups of diverse systems.

Incremental Backup-
An incremental style repository aims to make it more feasible to store backups from more points in time by organizing the data into increments of change between points in time. This eliminates the need to store duplicate copies of unchanged data: with full backups a lot of the data will be unchanged from what has been backed up previously. Typically, a full backup (of all files) is made on one occasion (or at infrequent intervals) and serves as the reference point for an incremental backup set. After that, a number of incrementalbackups are made after successive time periods. Restoring the whole system to the date of the last incremental backup would require starting from the last full backup taken before the data loss, and then applying in turn each of the incremental backups since then. Additionally, some backup systems can reorganize the repository to synthesize full backups from a series of incremental

Differential Backup-
Each differential backup saves the data that has changed since the last full backup. It has the advantage that only a maximum of two data sets are needed to restore the data. One disadvantage, compared to the incremental backup method, is that as time from the last full backup (and thus the accumulated changes in data) increases, so does the time to perform the differential backup. Restoring an entire system would require starting from the most recent full backup and then applying just the last differential backup since the last full backup.

Copy Backup-
A copy backup type repository stores a recent "mirror" of the source data and a series of differences between the mirror in its current state and its previous states. A Copy backup will start with a normal full backup. After the full backup is performed, the system will periodically synchronize the full backup with the live copy, while storing the data necessary to reconstruct older versions. This can either be done using hard links, or using binary diffs. This system works particularly well for large, slowly changing, data sets.
Restore process
The process of getting the data back from the existing backup file is call restore process. The existing data backup file which is stored or created by the users for keeping the data safe in case of corruption or deletion of the original data. The backup file is present in the compact or compress format or in the exact copy of the existing data in the existing data format.



Steps off backup
Back up
There are several ways to back up your PC.

1.    Select the Start  button, then select Control Panel > System and Maintenance > Backup and Restore.
2.    Do one of the following:
·         If you've never used Windows Backup before, or recently upgraded your version of Windows, select Set up backup, and then follow the steps in the wizard.
·         If you've created a backup before, you can wait for your regularly scheduled backup to occur, or you can manually create a new backup by selecting Back up now.
·         If you’ve created a backup before, but want to make a new, full backup rather than updating the old one, select Create new, full backup, and then follow the steps in the wizard.
Step’s of Restore
Restore
1.    Right-click the Start  button, then select Control Panel > System and Maintenance > Backup and Restore.
2.    Do one of the following:
·         To restore your files, choose Restore my files.
·         To restore the files of all users, choose Restore all users' files.




Comments

Post a Comment

Popular posts from this blog

techifoblogger:- Ethical hacking

-
Image
Ethical hacking:- The term ethical hacking is mostly misunderstood by the people with the word hacker. The hacker word contains a lot of black history in the last few decades but the term ethical hacking has a different meaning connected to it. The term ethical hacking itself describes the meaning of the word i.e Ethical : with rules Hacking : to hack. The term hacker is  a called person who try to access the another persons data without having the proper permission of the owner. Or tries to access the personal files of the owner.The hacker is often called to a person who is unauthorized to access  the network of the someone  but if he still tries to get access to  network by guessing the password or by any other method. Example :- If a person found the WiFi on his device but the WiFi network is protected with a password the user still want to connect to the network and attempts to predict the password and succeed to guess the password the person wil...
Read more

TechInfoblogger;- REMOTE ACCESS CONTROL

-
Image
Remote access:-                                                               Definition:      Remote access:-  Remote access service offers access to a remote machine or host or server from a remote location.This technology is very useful in case if an IT administrator is away from his office or providing support from a remote location.If you have enabled the remote access on any machine or server in the network,you will be able to access that machine or server from remote location and can work remotely on it. Example :  Yash is an IT administrator for a company Remotesupportindia.com . He left for the day.While he was on the way to his home he got a call from his team. As specific service was not running properly. As the server was remote enabled, Yash could access that server remotely...
Read more

Techinfoblogger11:- Storage pool

-
Image
Storage pool The storage pool is the combination of the multiple hard drive connected to a system and use as one single hard drive.   A storage pool is created if we have two small storage hard disk instead of one single hard disk . A storage pool is created for merging two or more hard disk and to make them use or work as a single hard disk. The client oprating system which contains the storage pool are windows 8.1/windows 10. The server oprating system of windows server 8 and all the later version consist of the storage pool system in it.
Read more