 |
||
Harddisk Knowledge |
PC Maintenance |
Norton Utilities |
Dos Command |
Soft Ware
 |
 |
 |
The bad track problemA compromise of sensitive data may occur if media is released when an addressable
segment of a storage device (such as unusable or "bad" As an example, a disk platter may develop unusable tracks or sectors; however, sensitive data may have been previously recorded in these areas. It may be difficult to overwrite these unusable tracks. Before sensitive information is written to a disk, all unusable tracks, sectors, or blocks should be identified (mapped). During the life cycle of a disk, additional unusable areas may be identified. If this occurs and these tracks cannot be overwritten, then sensitive information may remain on these tracks. In this case, overwriting is not an acceptable purging method and the media should be degaussed or destroyed. |
what's Data recoveryFrom Wikipedia,Data recovery is the act of salvaging data stored on damaged media, such as magnetic disks and tapes. There are a number of companies and software products that can help recover data damaged by a disk crash or computer virus. Of course, not all data is recoverable, but data recovery specialists can often restore a surprisingly high percentage of the data on damaged media. The ability to recover "deleted" data is a problem when equipment used to store sensitive data is to be discarded. See: Data remanence. Data recovery cases can be divided up into two main categories:
Increased Incidents of Data LossDespite technological advances in the reliability of magnetic storage, the incidence of data loss continues to rise. Data storage devices are susceptible to damage from natural and human sources. Consider these facts:
|
Good Site Links: ActionFront Data Recovery Labs 
Purging is the removal of sensitive data from a system or storage device in such a way that there is assurance, proportional to the sensitivity of the data, that the data may not be reconstructed through open-ended laboratory techniques. A computer must be disconnected from any external network before a purge. Purging must be used when the secured physical environment (where the media was used) will not be maintained. In other words, media scheduled to be released from a secure facility to a non-secure facility or environment should be purged. |
What to do ?Don't Worry
Data backup methodologies like real-time data replication can be quite costly but offer the greatest protection against data loss. This solution may not be suitable for some organizations who may opt to backup data with a scheduled data back up, normally nightly, to storage tapes that can be sent offsite. With a nightly backup, there is a risk of lost data in the interval between the nighttime data backup and a daytime incident that causes data loss. In such cases, normally the data must be recreated. Individual home users can simply copy data on a desired schedule to any number of different storage media types. Data backup recovery tests should be performed for all backup processes prior to a data loss to verify the integrity of the data backup process. IF YOU THINK YOU HAVE EXPERIENCED DATA LOSS OF IMPORTANT FILES BE CAREFUL WHAT YOU DO! Some data loss is caused by simple things such as loose wires. Note any efforts you take carefully. Carefully document what happened just before the data loss--events such as software installation, sudden power loss, component installation, system upgrade, and so on. These details can be very helpful for the data recovery team. If you make changes to the media in an effort to recover data it could easily make the situation worse. If the information is important, it's a good idea to work from a bit-for-bit copy of the media rather from the original media. Any reputable data recovery lab will know how to make such a working copy. Don't be tempted to open a hard disk drive "to see what's wrong". The smallest spec of dust could render the drive useless. Hard disk drives should be opened for repair only in a dust free class 100 or better clean room environment. If you have a disk that is making scraping, grinding or clicking noises turn off the computer immediately and leave it off. Pack up the disk carefully (as though it was eggs) and send the drive to a reputable data recovery lab. Those sounds could be indicative of your disk platters being damaged. The longer the platters are exposed to abuse the less likely the data will be recovered, every second counts. If you want to know more about data recovery, please visit wikipedia. {Top}
Outdoor Book Internet Epoch Cooking Web Look Faq Investment Service By Mortgage Like Pet Software for purging To
purge the AIS storage media, the DoD requires overwriting with a pattern, then
its complement, and finally with another pattern; e.g., overwrite first with 0011
0101, followed by 1100 1010, then 1001 0111. The number of times an overwrite
must be accomplished depends on the storage media, sometimes on its sensitivity,
and sometimes on differing DoD component requirements. Software developers must
design the software such that the software continues to write to all addressable
locations on the media, in spite of intermediate errors. All such errors in usable
sectors should be reported with a listing of current content. Unusable sectors
must be completely overwritten, because the unusable sector list will not show
whether the sector ever contained any sensitive data. If any errors occur while
overwriting or if any unusable sector could not be overwritten, then degaussing
is required.
There are additional risks to trusting overwrite software to purge disks. The environment in which the software must operate is difficult to constrain. For this reason, care must be exercised during software development to ensure the software cannot be subverted. The overwrite software should be protected at the level of the media it purges, and strict configuration controls should be in place on both the operating system the software must run under and the software itself. The overwrite software must be protected from unauthorized modification. Despite its issues, software-based data destruction methods are inexpensive and easy to use for the average computer user. Darik's Boot and Nuke[1] (http://dban.sourceforge.net/) is an open source, GPL-licensed data destruction program that fits on a single 3.5 inch floppy disk. Its programmers claim that, when used on boot media, the program can reliably destroy all data on IDE and SCSI hard drives. This is intended to defeat most forensic data recovery methods and bring the program into compliance with United States Department of Defense and Royal Canadian Mounted Police standards, among others. Systemic problems with clearing and purging in practical systemsDisk storage systems in modern computers systems are both buffered at the disk and within typical operating systems. It is not, generally possible to have any assurance that a particular sector on disk has actually been written, as the data may have been buffered at the disk (or within the operating system)and not written prior to a power down or reset. In addition, some disk management software is intelligent and may notice that the same sector is being re-written several times, and simply cancel all but the last. Despite overwrite of a disk sector, it has been shown that, with sufficient care and resources, the chance of recovering some or all of the supposedly erased and overwritten data is substantial. Peter Gutmann of the University of Auckland investigated this possibility in the middle '90s and his paper recounting his results is surprising. In light of this, it will be clear that intelligent buffering of sensitive data can, in some systems, be inadequate to render that data unavailable.
When the data being temporarily stored is of an extremely sensitive nature, such as cryptographic keys, considerable care is required, and must be based on the particular characteristics of the operating system, RAM, and long term storage in use. There is no universal solution, and for a particular system, there may be no solution at all which ensures data is unrecoverable. Other links: Telemarketing Help | Swingers Dating | Unified Messaging Info | Load Balancing | Look Hinges Operating systems which guarantee that a particular system call will securely erase and overwrite a specific block of memory, and disk drives which will guarantee that specific data will be committed to storage without optimization, and an interface which controls that mechanism will be required, at minimum. There are no readily available operating systems nor storage devices which provide such facilities. Ontrack Data RecoveryOntrack Data Recovery is the world leader in data recovery services and data recovery software ensuring the fastest, most convenient and cost-effective solutions. Some of the benefits that Ontrack provides our customers include:
ONTRACK DATA RECOVERY ADVISES COMPUTER USERS ABOUT SEVERE SUMMER WEATHERJuly 19, 2005Predictions of Bad Hurricane Season Dictate Proactive Measures Against Data Loss MINNEAPOLIS – The hurricane season can be as destructive to computer data as it is to property, according to Ontrack Data Recovery, the industry’s leading data recovery provider. With the National Oceanic and Atmospheric Administration predicting 12 to 15 tropical storms this year, the Atlantic Seaboard and Gulf Coast will likely be in for another bad hurricane season. “Last year’s hurricane season was devastating to many businesses in Florida and the Gulf Coast as several were unprepared to deal with the downtime caused by significant computer damage and data loss,” said Jim Reinert, senior director of Software and Services for Ontrack Data Recovery. “If damaged computers are not handled properly, valuable information could be lost. Ontrack can usually recover data from computers that have been corrupted or seemingly destroyed due to severe summer weather of any kind.” To help computer users prepare for the upcoming hurricane season and other severe summer weather, Ontrack offers these tips to help protect against damage from severe weather and lessen the chances of data loss if damage does occur: * Do not shake, disassemble or attempt to clean any hard drive or server that has been damaged – improper handling can make recovery operations more difficult which can lead to valuable information being lost; * Lightning can be a significant problem during summer storms. Make sure to install a surge protector between the power source and the computer’s power cable – and spend the extra $20-$30 to get an actual surge protector, not a power strip; * Check protection devices regularly: At least once a year you should inspect your power protection devices to make sure that they are functioning properly. Most good ones will have a signaling light to tell you when they are protecting your equipment properly; * Businesses with network servers should invest in some form of Uninterruptible Power Supply (UPS), which uses batteries to keep servers running during power outages; * Summer heat also can be a significant problem. Keep your computer in a cool, dry area to prevent overheating; * Never attempt to dry water-damaged media by opening it or exposing it to heat – such as that from a hairdryer; * Do not attempt to operate visibly damaged devices; * For mission critical situations, contact a data recovery professional before any attempts are made to reconfigure, reinstall or reformat. About Ontrack Data RecoveryOntrack Data Recovery (www.ontrack.com) is the largest, most experienced and technologically advanced provider of data recovery products and services worldwide. Ontrack is able to recover lost or corrupted data from virtually all operating systems and types of storage devices through its do-it-yourself, remote and in-lab capabilities, using its hundreds of proprietary tools and techniques. Ontrack Data Recovery is a brand name of Kroll Ontrack Inc., a technology services subsidiary of Kroll Inc., the global risk consulting company. ONTRACK DATA RECOVERY LAUNCHES NEW VERSION OF “DO-IT-YOURSELF” RECOVERY SOFTWARE PRODUCTSJune 28, 2005Ontrack? EasyRecovery? 6.10 Answers Recovery Demand with Enhanced Support and Capabilities MINNEAPOLIS – Ontrack Data Recovery?, the industry’s largest, most experienced and technologically advanced provider of data recovery products and services has launched a new version of its EasyRecovery? family of “do-it-yourself” data recovery and file repair software. Ontrack? EasyRecovery version 6.10 enhances support to include the latest file types and improves functionality for newer hardware configurations, helping users find the recovery solution most suitable for their specific needs. “With more than 100,000 requests for recovery service in 2004 alone, Ontrack understands the need for more powerful ‘do-it-yourself’ recovery options," said Jim Reinert, senior director of Software and Services for Ontrack Data Recovery. “Since a majority of EasyRecovery users are small businesses, it is particularly important to provide software offering an immediate impact on their business continuity, thus minimizing the many disruptions a data loss situation can create.” The EasyRecovery 6.10 family of products delivers a variety of enhancements giving data loss sufferers more control over the recovery process. New features include:
The EasyRecovery product family consists of five distinct product offerings that provide a no-risk method for data recovery/file repair needs, helping both business and home users minimize downtime and the cost of lost productivity:
Product Features
EasyRecovery Professional is available for $499, EasyRecovery DataRecovery for $199, EasyRecovery FileRepair for $339, EasyRecovery EmailRepair for $279, and EasyRecovery Lite for $89. All five products are available via the Ontrack Web site at www.ontrack.com/software or by calling Ontrack at 800-872-2599. Volume and corporate licensing opportunities are also available for EasyRecovery Professional. Please contact Ontrack for more information. About Ontrack Data Recovery Ontrack Data Recovery is the largest, most experienced and technologically advanced provider of data recovery products and services worldwide. Ontrack is able to recover lost or corrupted data from virtually all operating systems and types of storage devices through its do-it-yourself, remote and in-lab capabilities, using its hundreds of proprietary tools and techniques. Ontrack Data Recovery is a brand name of Kroll Ontrack Inc., a technology services subsidiary of Kroll Inc., the global risk consulting company. If you want to get more about data recovery info, please visit ontrack site {Top} |
Causes of Data LossData loss happens for a number of reasons. Anything that is considered important should exist in AT LEAST two distinct physical locations. Unfortunately most people don't commit the time/effort/resources to ensure that a good backup is in place otherwise data recovery would be unnecessary. Hot Links: Wireless Network FAQ | Look Oriental Rugs | Snoring FAQ | Look Judaica | Project Management Info It has become a major problem over the last few years as more and more digital information is being stored on media that fails. It’s estimated that only 3% of the worlds information is backed up. If backups are not done or not done correctly simple failures can leave you without any data, or with the wrong data. Causes of Loss in Databases:
Remember that at some point everyone who works on a computer will experience data loss. It’s not a question of if data will be lost but when data will be lost.A data loss situation is usually characterized by the sudden inability to access data involving a previously functioning computer system or backup or the accidental erasure of data or overwriting of data structures. |
What is Data Loss? Typical Characteristics of a Common Data Loss Situation:
{Top} |
|
Home Page
| Harddisk Knowledge
| PC Maintenance
| NortonUtilities
| Dos Command
| SoftWare
| Data Mac Recovery
| Nt Data Recovery
| Data Recovery Tape
| Data Disk Recovery
| Data Laptop Recovery
| Links
| Site Map
|
To prevent catastrophic data loss, a routine data backup that
creates a second copy of important data for storage in a different physical location
must be established. A data backup will not insure 100% recovery of data, however
a data backup will offer the ability to recover some portion of the lost data
with relative ease. The freshness of the recovered data will depend on the frequency
of the data backup. The frequency of data backup is dictated in some instances
by law, in some instances by corporate policy and in others, by good user practice.
In addition, a similar recoverability has been observed in RAM, and it is
therefore, generally, not possible to assume that removing the power from volatile
RAM will always render the data stored in it unrecoverable. There are slow memory
biasing mechanisms in some RAM circuits, usually connected to charge migration
in semiconductor structures, which can retain data across such power cycling.
Available in English, French, Italian, German and Spanish, the EasyRecovery 6.10 family allows recovery from various types of media including IDE/ATA/EIDE/SCSI and now SATA hard drives, zip removable media, floppy diskettes, Jaz removable media, external media devices (USB/Firewire drives, USB key drives) and digital media (i.e. CompactFlash, SmartMedia, flash memory, memory sticks) for files created on DOS, Windows 3.x, 95, 98, Me, 2000, NT and XP systems.