Can You Restore Your Data From Your Backup?

Written by Per Strandberg

Can You Restore Your Data From Your Backup? -By Per Strandberg (c) 2003

Making backup is vital!

For small business peoplerepparttar value of their business is often stored on their computers.

Emails, contracts, PowerPoint presentations, business contacts, text documents and client databases are all vital information.

Accidents do happen and data can be lost! Are you sure you can restore your data back to what it was? Can you be back in business without losing to much time?

To be onrepparttar 107766 safe side you should adopt a working backup strategy! Let's look at what can happen!

There are three different cases to consider.

1. Specific files or folders have been corrupted or deleted by accident.

2. The data on your hard disk have been lost. This can be caused by a virus or by hard disk failure.

3. Your computer have been lost. This can be caused by a natural disaster, a fire or by theft.

Your preparation and action should to be different in each different case.

It will also depend on how valuablerepparttar 107767 data are for you and how much you are willing to spend on protection.

Here are your action plans for each case.

1. These are files which you are working with on a daily basis. It is vital data to your business and you should make backup of these files on a regular basis.

You should therefore identify them in advance. It can be files in folders like MyDocument, your emails or database files where you store your business information.

To do this you need to find a backup product from which you can easily make backup of these vital files on a regular basis.

Storerepparttar 107768 backup you make in a safe place.

For extra security you can backup files online to a web server or you can hire space from companies that offer online backup services. If you use this option you should encrypt your data.

2. When you have a hard disk data loss you have to format repparttar 107769 disk, maybe withrepparttar 107770 help from a person with experience.

The work involved reconfiguringrepparttar 107771 computer by installing Windows can be extensive.

First after that Windows andrepparttar 107772 backup program have been installed are you able to restorerepparttar 107773 data from your backup.

To avoid this extra work you may consider making a full backup of your hard disk image. From an image backup you are able to restore directly your complete data back to your hard disk and avoid extra installation work.

3. You have lost your computer. But, because you already have backup of your vital data which you are working with on a daily basis, you are able to restore your business to any configuration on a new computer.

You just have to have your application products and your working data restored to be back in business.

Different RAID Levels

Written by Ronald Merts

Different Types of RAID RAID Level 0 RAID Level 0 or striping is optimized for performance atrepparttar expense of fault tolerance. Drives in a RAID 0 array organizes data in such a way that it is striped acrossrepparttar 107765 multiple drives. A RAID Level 0 array can contain any number of stripes. In RAID 0 if you have 2 x 60 gig drivesrepparttar 107766 array size will be 120 gig. The reason RAID 0 is a performance-enhancing configuration is that striping enablesrepparttar 107767 array to access data from multiple drives atrepparttar 107768 same time. In other words, sincerepparttar 107769 data is spread out across a number of drives inrepparttar 107770 array, it can be accessed faster because it's not bottled up on a single drive. This is especially beneficial for retrieving very large files, since they can be spread out effectively across multiple drives and accessed as if it wererepparttar 107771 size of any ofrepparttar 107772 fragments it is organized into onrepparttar 107773 data stripes. The downside to RAID Level 0 configurations is that it sacrifices fault tolerance, raisingrepparttar 107774 risk of data loss because no room is made available to store redundant data. If one ofrepparttar 107775 drives inrepparttar 107776 RAID 0 fails for any reason, there is no way of retrievingrepparttar 107777 lost data as can be done in other RAID implementations described below. RAID Level 1 The RAID Level 1 is achieved through disk mirroring, and is done to ensure data reliability. RAID 1 also enhances read performance, butrepparttar 107778 improved performance and fault tolerance are atrepparttar 107779 expense of available capacity inrepparttar 107780 drives used. In RAID 1 If you have 2 x 60 gig drivesrepparttar 107781 array size will be 60 gig. In a RAID Level 1 configuration,repparttar 107782 RAID management software instructsrepparttar 107783 subsystem's controller to store data redundantly across a number ofrepparttar 107784 drives (mirrored set) inrepparttar 107785 array. In other words,repparttar 107786 same data is copied and stored on different disks known as mirroring to ensure that, should a drive fail,repparttar 107787 data is available somewhere else withinrepparttar 107788 array. In fact, all but one ofrepparttar 107789 drives in a mirrored set could fail andrepparttar 107790 data stored torepparttar 107791 RAID 1 subsystem would remain intact. A RAID Level 1 configuration can consist of multiple mirrored sets, whereby each mirrored set can be a different capacity. Usuallyrepparttar 107792 drives making up a mirrored set are ofrepparttar 107793 same capacity. If drives within a mirrored set are of different capacities,repparttar 107794 capacity of a mirrored set withinrepparttar 107795 RAID 1 subsystem is limited torepparttar 107796 capacity ofrepparttar 107797 smallest-capacity drive inrepparttar 107798 set. The read performance gain can be realized ifrepparttar 107799 redundant data is distributed evenly on all ofrepparttar 107800 drives of a mirrored set withinrepparttar 107801 subsystem. The number of read requests and total wait state times both drop significantly; inversely proportional torepparttar 107802 number of hard drives inrepparttar 107803 RAID. RAID Level 2 RAID Level 2 is rarely used in commercial applications, but is another means of ensuring data is protected inrepparttar 107804 event drives inrepparttar 107805 subsystem incur problems or otherwise fail. This level builds fault tolerance around Hamming error correction code (ECC), which is used as a means of maintaining data integrity. ECC tabulatesrepparttar 107806 numerical values of data stored on specific blocks inrepparttar 107807 virtual drive using a special formula that yields what is known as a checksum. The check-sum is then appended torepparttar 107808 end ofrepparttar 107809 data block for verification of data integrity when needed. As data gets read back fromrepparttar 107810 drive, ECC tabulations are again computed, and specific data block checksums are read and compared againstrepparttar 107811 most recent tabulations. Ifrepparttar 107812 numbers match,repparttar 107813 data is intact; if there is a discrepancy,repparttar 107814 lost data can be recalculated usingrepparttar 107815 first or earlier checksum as a reference point.

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