In-File Delta Enhances Offsite Secure Backup Technology

We are all aware of the benefits backing up to a remote location. However the greatest problem with backing up data via the internet is explained as follows:-

Large files x low bandwidth = Massive backup time.

In-file delta helps to greatly reduce this issue. Files up to 300GB can use In File Delta technology. This basically means, after initial file backup, only changes in that file will be sent to an offsite location. This makes offsite secure backup more usable for large databases like Microsoft Exchange.

Here you can learn what in-file delta technology is and how in-file delta can be used to backup large database files (e.g. a 10GB Outlook.pst file) without uploading the whole database file everyday.

In-file delta technology is an advanced data block matching algorithm which has the intelligence to pick up changes (delta) of file content between two files when one of the files is not accessible and use the delta information between two files to rebuild one file from the other. Are you with me so far? Using this algorithm, daily backing up of large file (e.g. a 10GB Outlook.pst file) over low-speed internet connection is made possible because it requires only the changes of information since last backup to be sent to complete the backup of a large file (here we assume that the full backup of the file has been saved on the backup server already).

This is what would happen to the backup of a 10GB Outlook.pst file when it is backed up by PerfectBackup OBM with in-file delta technology.

The whole files (10GB), along with its checksum (128-bit) file, are backed up to the backup server. This can be done directly through the internet or indirectly using the seed load utility on a removable hard disk.

When backup runs again later (normally the next day), PerfectBackup OBM will download a checksum listing of all data blocks of the full backup file from the backup server and use it to pick up all changes that have been made to the current Outlook.pst file from the first full backup.

Changes detected are then saved in a delta file which is uploaded to the backup server. (This delta file is assumed to be small because the content of all PST files doesn't change lot of even after it has been updated)

Subsequent backups of this 10GB Outlook.pst file will go through step ii and step iii again. As explained, only a small delta file will be uploaded to the backup server.

With in-file delta technology, daily backing up of large file over low-speed internet connection is now possible

Example 1: If you are adding 200MB to Outlook.pst everyday, the first delta backup will upload a 200MB delta file and the next delta backup will upload a 400MB delta file. This will go on until Day 50 when the delta file required to be backed up reached 10GB. This delta file size (10GB) is now is 50% of the Outlook.pst which is now 20GB (remember that you have added 100MB to this file everyday). If the [Delta Ratio] is set to be 50% (default), the whole Outlook.pst file will be uploaded again.

Example 2: If you are adding 50MB to Outlook.pst everyday, the first delta backup will upload a 50MB delta file and the next delta backup will upload a 100MB delta file. This will go on until Day 100 because it is the [Maximum number of delta] (default) allowed in this backup set and the whole Outlook.pst file will be uploaded again.

All delta files are generated with respect to changes made since the last full backup file (i.e. differential backup). This means that only last full backup file and the last delta file are required to restore the latest snapshot of a backup file. This means that other intermediate delta files are only required if you want to restore other snapshots of a backup file.

In-File delta does differential backup rather than incremental backup. It is designed this way so that a corrupted delta file would only make one particular version of a backup file non-recoverable and all other backups created by other delta files of the same file would still be intact.

The full backup file, its checksum file and the last delta file uploaded (if more than one delta files have been uploaded to the backup server) are always stored in the data area. This means that these files are not affected by the setting of the retention policy and will always be kept on the backup server. This is done this way because all these files are required to get the latest snapshot of the backup file and they should not be removed from the backup server by the retention area cleanup routine. All other intermediate delta files are stored in the retention area.

To evaluate the PerfectBackup software free of charge for a month with in-file delta, please visit http://www.perfectbackup.co.uk/products

Data Backup, The Why How When for Business or Home

1. What you should be doing about data backup and why?

2. Fine electro-mechanical devices to backup.

3. Meant to do it!

4. Once Bitten.

5. Backup, a mistaken or confused name.

6. What do you need to do today to start a backup plan or backup program?

7. Let's get organised.

8. Things to save or to backup.

9. Our recommended Backup System.

10. Near worst case scenario. When you most need a backup to restore from.

11. Our own system. How we backup our data.

12. Remember, Backup, start today.

1. Why do a data backup?

What you should be doing and why?

Computers always go perfectly. Right? What would you do without your PC? Computers can and do fail usually at the worst possible time. They may get stolen, trashed or crash. Most of us deal with the problems as and when they occur.

There are times though, when a little bit of planning and forethought pays big dividends.

2. Fine electro-mechanical devices.

The hard drive in your computer has both electronic and mechanical components that work with very fine tolerances where the head literally flies a fraction of a millimeter above the disks fast spinning surface. Measurements a fraction of a human hair thickness are not unusual. So bumping or dropping them or having PC power problems causes the components to literally crash and may result in irreparable damage.

3. Meant to do it!

Most business people and many home users are aware of the need to Backup (or copy, in easy terms) their information to another place for safe keeping. After failures they often say 'I meant to do it but never made the time.'

4. Once Bitten.

Every day before they walk out of the office they'll religiously run or at least start the backup going. In the morning they'll check and make sure all went OK with the Backup and look at any errors reported.

5. Backup, a mistaken or confused name!

Simply put, Data Backup is the ability to recreate or restore the system you had working before the PC failure or loss.

It may be called Copy, Save, Burn, Write. Unfortunately the word Backup is often used different ways. And means different things in different places!

Bookkeeping software typically prompts you to backup your data (the company accounts and ledgers, in other words). But the backup is usually on the PC not another disk or computer. So if that computer goes missing, then the company bookkeeping info is gone too.

You need to do this type of data Backup for bookkeeping and company client lists.

But there's more to do. Make a note where it goes to so you can Backup or copy it to another disk, CD, ZIP or Flash device you can take home.

6. What do you need to do today?

Simple. Work out what you use your computers for that you simply couldn't do without if it wasn't there tomorrow.

Would your business or personal relationships STOP without the ability to re-create the computer info you're using?

Please. Take a minute to read the full story below.

7. Let's get organised.

You'll need: -

any equipment and software to make the backup;

a plan to follow to do it regularly;

to backup what you should;

to store it somewhere safe;

to write down the backups done;

reminders to do it next time;

most of all the patience to wait and do it whenever it's due.

Lastly, it should be tested that you can recover from disaster if it ever occurs.

8. Things to save.

Information to Backup should include Documents; Spreadsheets;

Bookkeeping & Transaction data; Address Books; Lists; Emails; Personal information, Photos; Downloaded Programs and Licenses; Favorites;

Special things; Internet & Email settings; Regulatory matters.

Many of these items are irreplaceable, so they should be safeguarded.

9. Our recommended backup system.

Two copies, one at your place and one at a friends place.

Small Backup, things that change frequently, done daily.

Big Backup, total Backup of your PC because the info is organised in a disorganized sort of way, spread over the hard drive in hard to find places, done weekly or monthly.

More than one PC?

If you have more than one PC you may need to re-think and re-organise where information is stored in the computers.

A central point for all company data is easier to manage and Backup than data in all the odd places on the computer. You may investigate 'synchronizing' data so it's naturally on more than one PC.

10. Near worst case scenario.

If the Hard drive fails the information may be recoverable.

But it's a very expensive job by the professionals.

Occasionally one of our customers has needed to retrieve data from a dead hard drive. We recommend a particular company who has always managed to recover the data, but there's a lot of lost time and un-necessary expense especially when compared to the simple smart solution where you take all the necessary precautions and do the backup first.

We hope you never see one of these errors:-

an MYOB fatal error 1199 as one of our customers did recently. It translates to the data file causing this error is definitely unusable and irrepairable. It can only be fixed by restoring your data from your most recent backup. (Do you have a recent Backup?)

or HAL.DLL is missing or corrupt. It translated (in this case) to the Windows folder has disappeared. Anything at all that was stored in the windows folder is GONE. Windows needs to be re-installed from the original media (CD), Updated and Settings restored from a recent backup.

Occasionally we (you or I) will start working on a document or data file and have a little accident. Accidents happen to us all occasionally. The simplest way is often to simply restore from the most recent backup, or waste a lot of productive time just getting things back to the way before we commenced, and made the accident.

Just imagine what the worst case would be!

11. Our own system. How we backup.

Pixel ITT has these systems in place.

Daily, MYOB, when closing company data the data integrity is checked and Zipped up on the C Drive. It takes about 3 minutes.

Monday, 9am, Customer database and documents, Zipped into one file on C Drive. Takes 5 to 10 minutes at the start of day.

Monday to Friday, 9.50pm, Automatic Backup using XXCopy Pro of My Documents Folder which includes, MYOB, Customer data, Documents, saved to a redundant (older) PC as a file server, 5 minutes unattended. Older PC must be turned on and available on the office network.

Monday to Friday, 10pm, Automatic Unattended Backup of daily data important to business, MYOB, Customer data, Documents, Security info saved to CD, 3 to 5 minutes usually unattended.

Every 2nd Saturday, 2 secondary PC's, Full incremental backup, to CD on main PC. Takes 10 to 20 minutes attended.

Every 4th Saturday, Main PC, Full incremental backup to CD on main PC, takes 60 to 120 minutes attended.

What's missing in our backup system?

Off-site backup copy could be more recent but has the main ingredients of our business in a workable version.

Backup test has been performed to restore secondary PC's only. The main PC will be done when time permits or it becomes necessary.

12. Remember, Backup, start today.

We tell our customers, whether they're small business clients or home computer users at every chance we get, to backup, somehow, but backup regardless. We've all got cd burners and cd writing software these days, but still most clients do not have a recent data backup or use the backup software that came with their computer. If the worst disaster happens, we're called in to clean up the situation and regretfully tell the customer if they didn't backup before the computer was stolen or broken there's really nothing we can do to ease their pain whether it's business critical data or data like home pictures and email address contact lists.

So BACKUP, Backup, backup just do a BACKUP.

Greg Martyn is a partner in Pixel ITT providing computer service and support in the St George and Sutherland area south of Sydney Australia. Pixel ITT also supply software for backup, internet security, antivirus and firewall in Australia. Greg Martyn has been in a technicial role since 1967, and until 2000 worked for OTC and Telstra. Pixel ITT use and recommend the software we sell including EMCDantz Retrospect Pro which is our main backup tool. Trial software and more info is available through http://www.pixelitt.com.au.

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Setting up a Tape Backup Strategy for your Business

So you know a little bit about tape backup, but you're wondering how to set up a tape backup strategy for your business. Well, let's take a look at 3 simple steps to setting up a complete backup solution.

Step 1: Purchase your tape backup hardware

Firstly, purchase the tape backup hardware. If you need to perform file server backup (or Exchange Server backup or SQL Server backup) for small business, then one of the following tape drives should suffice:

* Travan cartridge drive (up to 10 Gb)

* DDS tape backup drive (up to 20 Gb)

* DDS tape backup drive with hardware data compression (up to 40 Gb)

Then purchase the necessary tapes for your backup rotation strategy. A good Grandfather-Father-Child variation will require 10 tapes or 14 tapes.

Step 2: Purchase your tape backup software

When it comes to tape backup software, one option is to use NTBackup -- the standard Windows backup program. The problem with NTBackup is that it is too hard to use. While an expert should be able to schedule backup jobs using NTBackup, what you really want is something a novice can setup in minutes.

What you really want to do is invest in some quality backup software for your business? Well, if you run a small business, you'll want to avoid those expensive brands! They're designed for large corporations. You should really be looking for software for tape backup that does everything you need, but is affordable at the same.

Look for a backup program that's designed specially for small business instead. Look for a product that is advertised as being simple to use. Remember, you don't want software that requires an expert to run it. Download a trial version of the backup software and try it out for a month or so. If everything works smoothly and you're happy with the product, go ahead and make a purchase!

Step 3: Continually perform your backups

So you've attached the tape drive to your server and installed the software. You've configured the software to run your tape rotation scheme and everything's raring to go. So how do you go about performing backups?

Well, at the end of each working day, put the tape into the drive. And as obvious as this sounds, the correct tape should be placed in the drive. For example, placing the "Week 2" tape instead of the "Week 3" tape in the tape drive will reduce the effectiveness of your tape rotation strategy! Your tape backup software should take care of the rest.

In addition, you should monitor the results of each backup to check for errors. For example, if a tape wears out and data cannot be verified, you need to take action and replace that tape. If some problem prevented a backup from completing, you need to know about it so that you can re-run the backup the next morning.

Be sure to also follow your manufacturer's guidelines for drive cleaning and maintenance.

Final notes

As strange as this seems, you should be at the mercy of your tape backup software. And the more control it exerts over you, the better! Let me explain...

NTBackup assumes that you insert the correct tape and it doesn't inform you of any errors. You are responsible for selecting the tape according to your tape rotation scheme, and the onus is on you to read result logs and discover if any errors occurred.

This means that the file backup process is tedious and prone to human error. A complete solution for tape backup should take charge of your backup strategy for you.

A tape backup software should email tape rotation instructions and the results of backups to you or your secretary, making your task far simpler and minimizing the chance of human error. Select the right server backup software and you're already most of the way to implementing a complete tape backup strategy for your business.

Linus Chang is a backup expert and the lead developer of BackupAssist -- backup software that is simple and affordable, and perfect for small and medium businesses. Protect your Windows servers, including SQL Server and Exchange Server, to tape, REV drive, hard drive, NAS and more, at a fraction of the cost of other backup programs. Transforms NTBackup into a script-free and simple-to-use tool.

Learn How To Make Data Backup Over The Internet!

Why should you backup your data on the Internet?

There are several reasons.

* The backup is located at a secure place for away from your computer.

* It's is easy to do.

* Free available disk space on your web site can be used for storage.

* Disk space on remote server can be used for storage.

* It's a practical backup solution for small businesses and home users.

* It's gives extra security for documents and files.

There are basically three different types of data backup you can make!

* Full Backup of the hard disk.

* Full disk image backup for fast recovery.

* Backup of specific files and folders.

Online backup of a complete hard disk is not practical to do. Although, it can be done. The size requirement and the transfer speed over the Internet makes it yet not powerful enough to do. However in the future complete backup of hard disks online will be more common. Backup over the Internet is best suited for storing limited numbers of specific files and folders.

To do this you need an FTP software which makes it possible to move files over the internet. FTP stand for "file transfer protocol" and is the most commonly used method of transferring files between computers over the Internet.

Use FTP transfer and backup to your web site or to a remote server as a safeguard of your vital data files!

Learn how at http://www.data-backup-and-storage.com/ftp-backup.html

Normally you don't need to backup all the content of your hard disk, to recreate your data.

To be able to make a full recovery of your data, make sure that you keep CD's of all your installation programs and operating system in a safe place. In addition, if you have installed software from the Internet you need to keep copies of the installation programs as backup together with the installation codes.

After you have done that, you need to identify the files and folders that are important to backup.

These are the files you use on a daily basis either in private or in your business. If you are using Windows this can be files in My Document folder and/or your Outlook email files.

These are the files you need to backup so that you can recreate your computer back to what it was if you have lost your data.

If you transfer files from your hard disk directly to the remote site you risk exposing your data to hackers. Your data are not secure from outside preying eyes.

To get full protection you should use a backup software to first create a backup file which is stored temporarily on you hard drive. This file is then transferred with an FTP program to the online server.

There are also a number of online backup services you can subscribe to for this purpose. They often use their own transfer protocol.

Online backups should be made at regular intervals. It is also a practical way to make backup if you use a laptop and are on the move, given you have access to an Internet connection, of course.

If you get a hard disk crash or if your computer gets lost, then you need to be able to recover your data back to what it was

The first step you have to take is to install the operation system and the software from the installation CD's which you have stored in a safe place.

Next step is to download the backup or backups you are keeping on the Internet.

If you store your backup on a web site or on a server you should make sure that the backup is encrypted so that nobody else is able to read it.

You must keep the server's username and password you are using as well as the password you use for encryption of the backup written down on paper in a safe place so that you can recreate your data.

Full backup can be made using other types of media such as tapes, DVD's, on different disks or on networks.

To do this you need to have access to such devices.

This will cost you money.

The memory requirement for today's computers has increased. The cost of regular backup on tapes or on DVD's is high.

If you are an entrepreneur or a home computer user, this may not be an option available for you.

What happens if your computer gets stolen?

What happen if the building you keep your computer are struck by fire and destroyed?

Laptop and mobile computer are especially prone to theft. Not only because it is easy to carry away, but also because it is easy to get money by selling.

Therefore, you need to make backup of your important data on a location that is different from where you have your computer. Internet backup of data files is an attractive and cheap solution.

Per Strandberg has interest in backup technology and he is running an information site on backup and data security at http://www.data-backup-and-storage.com

Learn how to make secure online data backup using ftp at http://www.data-backup-and-storage.com/ftp-backup.html

Backup Software

Creating a backup for the data in a computer or any electronic storage device is very important. Most equipment, including personal computers, have a good chance of "crashing," which is the failure of the hard disk on which the data is stored. When a hard disk crashes, all the data is inevitably lost.

This possible loss is the main reason for creating backups of the data that we have and that we are likely to use sometime in the future. The frequency of backup creation depends on the usage level of the system, the kinds of files stored, the frequency of changes made to the data, and the importance of the data. Some people store a lot of files on their computers and keep adding new ones continuously. Such people need a daily or even an hourly backup.

There are different kinds of backups: full backup (creates backup for every file and folder in the system); incremental backup (only the changes are copied); unattended backup (the backup can be programmed to take place at a certain time without the active participation of the user); archive or disk image (option to create backup for just files or the whole disk); differential backup (creates backup for only changed files and newer versions of the files); and snapshot backup.

Backups can be made into a whole lot of different devices: compact disks, DVDs, floppy disks, tapes, printouts, removable hard disks, online servers, and so on. Backups can also be made into fixed media like another part of the hard disk or to another computer on the same network. Each of these has different capacities, security limits, conveniences, and risks. It is advisable to back up into more than one media for reducing risk.

The main criteria to be considered while purchasing a backup software program are the ease of operation, ability to backup without continuous monitoring, ability to handle different backup formats like hard disks and CDs, ability to restore with minimum errors, easy accessibility to backup files, ability to have different compression levels for different kinds of files, ability to backup over FTP, USB drives and networks, and ability to verify whether the files have been saved well.

There are several kinds of backup software available today. Some of the best programs include the Genie Backup Manager, NTI BackupNow!, Novastor NovaBackup, Handy Backup, Double Image, ABC Backup, Absolute Backup, Active Backup Expert, Advanced Backup, AKG Backup, Argentum Software, Avail Solutions, BackRex Backup, Backup Buddy, Data Sheriff, Disk2disk and several others. There are also free downloadable backup software programs such as TaskZip, EZBack-it-up, SyncBack, IceMirror, Version, Freebyte, Back4Win, MOB, My Own Backup, Workgroup, Simply Safe, and many more. Most of these software packages come with many other advanced functions such as password protection, restoring damaged backups, filtering of files and storing them accordingly, compression capabilities and several others. Backup software can be downloaded for free from the Internet. Some advanced software programs have to be purchased.

Backup Software provides detailed information on Backup Software, CD ROM Backup Software, Free Backup Software, Computer Backup Software and more. Backup Software is affiliated with Network Status Monitoring Software.