Wednesday, November 7, 2007

Colitis After Surgerydogs

practice support information

1 THAT IS A BACKUP?
Backup is the English name that refers to copies of backup Seguridad.Con got to keep our data safe. It is essential to the accidental loss of information
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2 TYPES OF SUPPORTING INFORMATION:
a) Ø

FULL backup: Save all files that are specified at run time support. The archive bit is removed from all files (or blocks), indicating that all files have been backed up. Ø
INCREMENTAL DIFFERENTIAL: This support is very similar to "Incremental Backup", the difference is that the archive bit remains intact.
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Ø CUMULATIVE INCREMENTAL: Here Save all files modified since the last Full backup. Using this option will benefit the recovery time of a disaster. Ø
SYNTHESIZED FULL: This advanced type of support can generate full backups on the backup server without accessing the original server where data is extracted, this technique can generate a full backup mixing the last full backup with incremental backups. This technique allows to generate full backups without causing unnecessary load on origin servers.

b) GFS: This sequence of supported is one of the most used and consists of weekly full backups and Incremental or Differential backups every weekday.
c) RAID 0: Each file is split (striped) and its fractions are placed on different disks.

d) RAID 1: Each time you go to save a file in the system will copy it to two discs full (online). This is why RAID-1 is also called mirroring or mirroring.

e) RAID 3: Divide the information of all files (striping) across multiple disks, but offers a level of support that RAID-0 does not. In RAID-0 if one disk fails the group, the information can not be recovered easily, since each group contains disk a fraction of the file, but RAID-3 operates with an album called "parity", which is fractions of the files necessary to recover all their information.
f) RAID 5: What happens if the parity disk fails? To resolve this problem RAID-5 not only distributes all files in a group of disks (striping), but also the parity information is kept on all system disks (striping). This RAID configuration is usually used in systems that require a "high level" of availability, even with the use of "Hot-Swappable Drives" can replace and retrieve information from a damaged disk, with minimal administrator intervention and without the need set or reset the system.

http://www.cientec.com/analisis/backup.asp

3 STORAGE DEVICES:


NAME DEVICE TYPE

Magnetic Disk drive:
secondary storage (direct access) and E / S. Large capacity, fast, direct access storage but relatively expensive


Magnetic tape drive Magnetic tape

cartridge reel and Secondary Storage (sequential access), E / S and backup disc
Cheap, fast transfer rate but sequential access

optical disk drive
cd-rom, worms, and erasable
secondary storage (direct access), and Warehousing. of historic.
High capacity, high quality storage. Basically a read-only media.

http://www.ucla.edu.ve/dac/Departamentos/coordinaciones/informaticai/documentos/cuadro% 20dispositivos% 20of% 20the% 20salida.htm 20Entrada%

optical disk: OPTICAL

The technology magnetic data storage has been using for decades, both the digital and in analog. Involves the application of magnetic fields to certain materials whose particles react to this influence, usually oriented at specific positions that remain after the waived magnetic field. These positions represent the data, whether images, numbers or music.
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4.-Why should support
file backups or backing up files (back ups) are required, as certain contingencies may occur on our computer with consequences that can be as severe as the ultimate elimination of important files. These contingencies are:
* Virus attacks * Corruption File

* Accidental deletion of files by users
* Formatting the hard disk accidental
* total or partial failure of the hard disk, such as errors in the surface of the
* Other


5 and 6 How to prepare to support the system and what are the backup file types and how are you?
The following describes the basic procedure for a proper backup of files, which mainly comprises three stages: 1 .-
Selecting and organizing the files to back
2 .- Selection of the physical storage media 3
.- Storage of files on the backup media

What files should be backed up?
First you should know that usually do not need to backup the entire hard drive. No need to backup the operating system (Windows 95, 98, NT, etc.) Or applications that run on it (Word, Excel, Internet Explorer, etc..), Since all these programs can be restored to its original settings using the boot disks. What it could be supported by these programs are certain configurations and preferences such as favorite websites (Bookmarks), emails, user profiles, drivers audio and video, Internet and so on.

How to organize the backup file?
Once you have located all the folders and files to support a good idea is if you have space on your hard disk, create a new folder called Backup and copy there in subfolders, all the necessary information. This facilitates the process at the time of copying files to the definitive means of support. Once the backrest can delete this folder and its contents.
How to back up files?
If you can not create a copy of all files, it is advisable to try to make the final copy to the back half of the form be more organized.
A very important detail and should not be overlooked is to keep the information about the location of all files backed up, or in any case, all files that are not documents created by you and always need to be located in some folder to work properly. These files are the Address Book (Address Book), Internet Favorites (Bookmarks) and Document Templates (Templates). You can create a text file (. Txt) with Notepad program (Notepad) where you specify the original location of the files and attach to the back.


What files should be backed up? The
selection of the physical environment to use for backup depends on the size and number of files, and of course, the availability of material resources.
If you have decided to copy all the backup files to one folder as previously suggested, a way to calculate the space needed for backup is still in Windows Explorer (Windows Explorer), click the right mouse button on the temporary folder back and select "Properties" (Properties). Will be shown a window that includes the folder size and number of files it contains.


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