Data Backup and Recoveryfrom Chapter 1. Microsoft Windows 2. Administrator's Pocket Consultant by William R. Stanek. Because data is the heart of the enterprise, it's crucial for you to protect it. And to protect your organization's data, you need to implement a data backup and recovery plan. Backing up files can protect against accidental loss of user data, database corruption, hardware failures, and even natural disasters. It's your job as an administrator to make sure that backups are performed and that backup tapes are stored in a secure location. Easy backup and recovery strategy to deliver. EaseUS Todo Backup software values data security much. 100% safe and clean backup solution keeps. Recover My Files data recovery software recovers deleted files emptied from the Windows. You couldn’t ask for more in your choice data recovery program. Repair My Backup - BKF Recovery Zip Repair Pro - Zip File. Our experts have reviewed the best data backup software for 2016. See up-to-date comparisons on features and the best prices for the top rated programs. Creating a Backup and Recovery Plan. Data backup is an insurance plan. Important files are accidentally deleted all the time. Mission- critical data can become corrupt. Natural disasters can leave your office in ruin. With a solid backup and recovery plan, you can recover from any of these. Without one, you're left with nothing to fall back on. HPE Backup and Recovery software and solutions provide organizations simple, reliable, and cost-effective backup and recovery from the core to the edge. Free easy-to-use backup and recovery software. Time Machine style backup, and more. Our team of experts has compared the best data recovery software for 2016. See up-to-date comparisons, reviews & costs for the top rated programs. Data protection with AOMEI Backupper, the affordable yet best Windows backup and restore software for home and business users. Easily backup data, restore system image, migrate os and so on. Figuring Out a Backup Plan. It takes time to create and implement a backup and recovery plan. You'll need to figure out what data needs to be backed up, how often the data should be backed up, and more. To help you create a plan, consider the following: How important is the data on your systems? For critical data, such as a database, you'll want to have redundant backup sets that extend back for several backup periods. For less important data, such as daily user files, you won't need such an elaborate backup plan, but you'll need to back up the data regularly and ensure that the data can be recovered easily. What type of information does the data contain? Thus, the type of information the data contains can help you determine if you need to back up the data? For example, data that changes daily should be backed up daily. How quickly do you need to recover the data? For critical systems, you may need to get back online swiftly. To do this, you may need to alter your backup plan. Do you have the equipment to perform backups? To perform timely backups, you may need several backup devices and several sets of backup media. Backup hardware includes tape drives, optical drives, and removable disk drives. Generally, tape drives are less expensive but slower than other types of drives. Who will be responsible for the backup and recovery plan? This person may also be responsible for performing the actual backup and recovery of data. What is the best time to schedule backups? However, you can't always schedule backups for off- peak hours. So you'll need to carefully plan when key system data is backed up. Do you need to store backups off- site? In your off- site storage location, you should also include copies of the software you may need to install to reestablish operational systems. The Basic Types of Backup. There are many techniques for backing up files. The techniques you use will depend on the type of data you're backing up, how convenient you want the recovery process to be, and more. If you view the properties of a file or directory in Windows Explorer, you'll note an attribute called Archive. This attribute often is used to determine whether a file or directory should be backed up. If the attribute is on, the file or directory may need to be backed up. The basic types of backups you can perform include. Normal/full backups All files that have been selected are backed up, regardless of the setting of the archive attribute. When a file is backed up, the archive attribute is cleared. If the file is later modified, this attribute is set, which indicates that the file needs to be backed up. Copy backups All files that have been selected are backed up, regardless of the setting of the archive attribute. Unlike a normal backup, the archive attribute on files isn't modified. This allows you to perform other types of backups on the files at a later date. Differential backups Designed to create backup copies of files that have changed since the last normal backup. The presence of the archive attribute indicates that the file has been modified and only files with this attribute are backed up. However, the archive attribute on files isn't modified. This allows you to perform other types of backups on the files at a later date. Incremental backups Designed to create backups of files that have changed since the most recent normal or incremental backup. The presence of the archive attribute indicates that the file has been modified and only files with this attribute are backed up. When a file is backed up, the archive attribute is cleared. If the file is later modified, this attribute is set, which indicates that the file needs to be backed up. Daily backups Designed to back up files using the modification date on the file itself. If a file has been modified on the same day as the backup, the file will be backed up. This technique doesn't change the archive attributes of files. In your backup plan you'll probably want to perform full backups on a weekly basis and supplement this with daily, differential, or incremental backups. You may also want to create an extended backup set for monthly and quarterly backups that includes additional files that aren't being backed up regularly. Tip You'll often find that weeks or months can go by before anyone notices that a file or data source is missing. This doesn't mean the file isn't important. Although some types of data aren't used often, they're still needed. So don't forget that you may also want to create extra sets of backups for monthly or quarterly periods, or both, to ensure that you can recover historical data over time. Differential and Incremental Backups. The difference between differential and incremental backups is extremely important. To understand the distinction between them, examine Table 1. As it shows, with differential backups you back up all the files that have changed since the last full backup (which means that the size of the differential backup grows over time). With incremental backups, you only back up files that have changed since the most recent full or incremental backup (which means the size of the incremental backup is usually much smaller than a full backup). Table 1. 4- 1 Incremental and Differential Backup Techniques. Day of Week. Weekly Full Backup with Daily Differential Backup. Weekly Full Backup with Daily Incremental Backup. Sunday. A full backup is performed. A full backup is performed. Monday. A differential backup contains all changes since Sunday. An incremental backup contains changes since Sunday. Tuesday. A differential backup contains all changes since Sunday. An incremental backup contains changes since Monday. Wednesday. A differential backup contains all changes since Sunday. An incremental backup contains changes since Tuesday. Thursday. A differential backup contains all changes since Sunday. An incremental backup contains changes since Wednesday. Friday. A differential backup contains all changes since Sunday. An incremental backup contains changes since Thursday. Saturday. A differential backup contains all changes since Sunday. An incremental backup contains changes since Friday. Once you determine what data you're going to back up and how often, you can select backup devices and media that support these choices. These are covered in the next section. Selecting Backup Devices and Media. Many tools are available for backing up data. Some are fast and expensive. Others are slow but very reliable. The backup solution that's right for your organization depends on many factors, including. Capacity The amount of data that you need to back up on a routine basis. Can the backup hardware support the required load given your time and resource constraints? Reliability The reliability of the backup hardware and media. Can you afford to sacrifice reliability to meet budget or time needs? Extensibility The extensibility of the backup solution. Will this solution meet your needs as the organization grows? Speed The speed with which data can be backed up and recovered. Can you afford to sacrifice speed to reduce costs? Cost The cost of the backup solution. Does it fit into your budget? Common Backup Solutions. Capacity, reliability, extensibility, speed, and cost are the issues driving your backup plan. If you understand how these issues affect your organization, you'll be on track to select an appropriate backup solution. Some of the most commonly used backup solutions include. Tape drives Tape drives are the most common backup devices. Tape drives use magnetic tape cartridges to store data. Magnetic tapes are relatively inexpensive but aren't highly reliable. Tapes can break or stretch. They can also lose information over time. The average capacity of tape cartridges ranges from 1. MB to 2 GB. Compared with other backup solutions, tape drives are fairly slow. Still, the selling point is the low cost. Digital audio tape (DAT) drives DAT drives are quickly replacing standard tape drives as the preferred backup devices. DAT drives use 4 mm and 8 mm tapes to store data. DAT drives and tapes are more expensive than standard tape drives and tapes, but they offer more speed and capacity. DAT drives that use 4 mm tapes can typically record over 3. MB per minute and have capacities of up to 1. GB. DAT drives that use 8 mm tapes can typically record more than 1. MB per minute and have capacities of up to 3. GB (with compression). Auto- loader tape systems Auto- loader tape systems use a magazine of tapes to create extended backup volumes capable of meeting the high- capacity needs of the enterprise. With an auto- loader system, tapes within the magazine are automatically changed as needed during the backup or recovery process. Most auto- loader tape systems use DAT tapes. The typical sys tem uses magazines with between 4 and 1. The main drawback to these systems is the high cost. Magnetic optical drives Magnetic optical drives combine magnetic tape technology with optical lasers to create a more reliable backup solution than DAT. Magnetic optical drives use 3. Typically, magnetic optical disks have capacities of between 1 GB and 4 GB.
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