Archive

Posts Tagged ‘Data Loss’

General Data Recovery Knowledges

February 21st, 2013 Comments off

1. The Frequently Reasons of Data Lose

a) Logically:

Delete;
Format;Virus;
Be Protected;
Partition tab or MBR/DBR Broken;

b) Firmware:

Management Modules:Hard Disk couldn’t work or work well;
Data Modules:Data lose or disordered;

c) Physically:

PCB Problem(Print circuit board. Donor PCB can be found on HDDZone.com);
Bad Sector;
Motor Broken;
Platter Scratch or out of alignment;
Head Broken or out of alignment;
Hard Disk over heated;
Other Reasons;

2. Hard Disk Defect Classification

Hard Disk Defect sector
Defect sector is the main defect in Hard Disk , it means the sectors couldn’t be read.
-ECC (error correct code) Error: Every Hard Disk write a data to a sector, it will produce a ECC code. The next time read this sector, the OS will compare the ECC, if it is not correct, it would show error sector.
-Sector ID / Address mark not found.

Reason:

Storage medium damage (scratch);
Magnetic reduce (Frequently R/W);
Head problem / OS problem;

Servo Track Defect
Every track has one or some servo info, for head seek position and recognize the right track.
If one servo has problem, this track couldn’t be read.
Represent:Couldn’t partition / Format / even scan

3 Impossible Scope of Data Recovery

a) Logical problem

Data has been overwritten or zerofill

b) Firmware problem

Key modules corrupt but couldn’t find the donor FW;
P-list was broken and no backup file;

c) Physical problem

Strong scratch;
Platter overhead or break;
Head or PCB broken and no donor material;

General Data-Loss Prevention Tips

July 17th, 2012 Comments off

data-loss The cost of a data loss event is directly related to the value of the data and the length of time that it is needed, but unavailable. Consider:

  • The cost of continuing without the data
  • The cost of recreating the data
  • The cost of notifying users in the event of a compromise

General Data-Loss Prevention Tips

Software and Hardware

  • Document your systems and archive original copies of your software in a safe place.
  • Backup your files on a regular basis, then test and verify that your backup is a complete copy of the original. External drives are an excellent choice for this task.
  • Never upgrade software or hardware without a complete, verified backup available in case you need to restore data.
  • If you are using Microsoft Windows XP, establish System Restore Points before making any significant changes to your system.
  • Write a contingency plan and practice restoring your data in case of problems. Your contingency plan should require, as a minimum:
    • Locating all available backups, including dates and types of backup.
    • Listing and locating all original software packages, detailing updates since the original installation.
    • Locating and making ready an alternate computer.
  • Deploy firewalls and virus protection.
  • Delete unused files and applications. Use a disc defragmenter, which is a program that is usually part of the operating system utilities.

Environment

  1. Ensure proper environmental conditions (stable temperature, humidity and cleanliness) and proper handling to avoid static discharge and accidental dropping.
  2. Physically secure systems from intruders.
  3. Prepare for physical disasters, including use of off-site storage for backup.

The following sections describe types of data recovery and supported formats and manufacturers. RAID data recovery, digital photo recovery, and VMWare workstation data loss are covered in separate articles under “Related Links.”

Laptop Data Recovery

As they are often carried about and exposed to different environmental factors such as heat, water and dust, laptop and notebook computers are far more likely to experience data loss than their office desktop counterparts. Their portability makes these sophisticated and essential in-the-field devices prime candidates for data loss.

Mechanical and electrical failure, software corruption and human error all play a role in data loss. Here are some of the most often noted data loss symptoms and data accessibility problems:

  • Dropped notebook – no longer turns on
  • Inaccessible drives and partitions
  • Applications that are unable to run or load data
  • Corrupted data
  • Virus attacks
  • Hard disk component failure
  • Hard disk crashes
  • Damage due to fire or liquids
  • Media surface contamination and damage
  • Accidental reformatting of partitions
  • Accidental deletion of data

Laptop Disk Drives Supported
You may not know this, but the hard disk drive embedded in your laptop is not necessarily by the same manufacturer as the laptop. Seagate Recovery Services recovers data from all notebook and laptop brands, models and interfaces – that is, from all types of hard disk drives from all manufacturers including Western Digital, Seagate, Toshiba, Fujitsu, Hitachi and Samsung.

Database Recovery

Mission-critical data is often stored in SQL Server, Oracle, Sybase, Exchange Server, Access and other databases that are maintained on networked fileservers. Relational and object-oriented database management technologies are fundamental to modern IT systems, often underpinning the lifeblood applications run by the entire corporation.

Individual media in database servers suffer from the same failure points as disk drives in personal computers and workstations. Experienced system administrators and database administrators know that a relational or object-oriented database environment is fragile unless supported by a comprehensive and well-tested backup plan.

Unfortunately, it is all too common for devices to become corrupt beyond the scope of routine recovery methods:

  • Backup files not recognizable by database engine
  • Database locked as ‘suspect’ preventing access
  • Deleted or dropped tables
  • Accidentally deleted records
  • Corrupted database files and devices
  • Damaged individual data pages
  • Accidentally overwritten database files and devices

Seagate Recovery Services specializes in making inaccessible data accessible again, recovering data from the most complex database configurations.

Database Types Supported

  • Microsoft SQL Server 6.5, 7.0, 2000, 2005, 2008
  • Oracle Lite, 8.x & 9.x, 10x, 11x
  • Sybase SQL Server
  • Sybase SQL Anywhere
  • Interbase
  • MySQL
  • PostgreSQL Standard Databases
  • Microsoft Access

SRS can also make inaccessible data accessible again for all xbase products such as dBase, FoxPro Productivity Applications Microsoft Office (including all versions of Word, Excel and Powerpoint Mail Server and Client Applications), Microsoft Exchange and Outlook Applications, and email systems conforming to the UNIX mbox format, such as Eudora and Netscape.

Server Data Recovery

Fileservers, application servers, mail servers, web servers, NAS devices and custom-built servers form the backbone of corporations’ business records storage systems. Windows servers–the most popular operating systems for servers today–along with Apple OSX, Solaris, HPUX, IAX, and Linux servers, form a significant portion of servers in businesses.

Naturally, the individual media in servers suffer from the same failure points as do drives in personal computers and workstations. However, the increased complexity of many server operating systems results in additional data loss situations:

  • Server registry configuration lost
  • Intermittent drive failure resulting in configuration corruption
  • Multiple drive failure
  • Accidental replacement of media components

Because servers are often utilized for mission-critical operations, customers need to get their data back quickly and securely. SRS services includes options for on-site data recovery, critical 24/7 options, as well as remote data recovery and special options.

Operating Systems and Platforms Supported
SRS technicians are trained on platform-specific configurations, enabling us to recover data from server hardware spanning the most popular brands, such as IBM, Dell, Hewlett-Packard, Sun and others, including:

  • Intel-based platforms for UNIX Operating systems including
    • Solaris, Linux with ext 2,3,4, xfs, reiserfs & jfs filesystems on standalone & RAID volumes in LVM (Logic Volume Management) configuration or without it
    • BSD-based systems such as FreeBSD, OpenBSD and NetBSD, BSDI
    • Apple Mac OSX
    • Legacy OS like QNX, SCO OpenServer, Xenix, UnixWare, LynxOS and so on
  • Intel-based platforms for Non-Unix Operating systems including:
    • Windows NT, 2000, 2003, 2008 servers
  • UNIX and non-UNIX Platforms such as
    • Solaris on Sun/SPARC equipment, with ufs and Veritas VxFS .zfs filesystems
    • HPUX on Hewlett-Packard workstations with hfs and Veritas
    • VxFS file systems on standalone
    • IRIX on SGI workstations with efs and xfs filesystems
    • Legacy VMS & OpenVMS running on Compaq & DEC equipment using ODS file systems
    • AIX on IBM RS/6000 with jfs file systems on LVM volumes

Tape Data Recovery

Server and personal-computer tape backup systems utilizing mm DAT, Travan, Exabyte 8mm, LTO and the various QIC formats are popular and necessary to safeguard your data. However, when these tapes fail, the situation is normally catastrophic, as these tapes were often the only remaining repository of the data. Quite often customers may no longer posses original tape hardware or software to restore from legacy environments.

Fire, smoke, water and even dropping the tape cartridge may damage the media, resulting in data loss. Internal mechanism failure and exposure to extreme temperatures, as well as logical read/write errors on a tape’s file may also result in data loss. Due to the nature of the tape solution, they are designed to withstand time to store archives. Some media if stored incorrectly or stored longer than the life span of the media may degrade causing data loss.

Here are some typical causes of tape failure:

  • Tape drive failure has corrupted tape headers
  • Tape media stretched or snapped
  • Fire & water damage Media surface contamination and damage
  • Accidental reformatting or erasure of tape
  • Accidental overwriting of headers
  • Tape backup software corruption
  • Media degradation due to the age or improper storage
  • Legacy tapes where tape drive or software no longer available

Formats and Manufacturers Supported
Popular backup software–such as EMC, Networker, CA BrightStore (ArcServe) plus the UNIX tar and cpio utilities (and many more)–all use different internal formats. SRS programmers are expertly trained to understand and extract data any type of tape media, regardless of format. SRS recovers data from these tape media formats and manufacturers, among others:

  • DLT III, DLT IV, DLT-1, VS80, VS160 and Super DLT tape
  • LTO 1, 2 , 3, 4, 5
  • 4mm DAT format DDS, DDS-2, DDS-3 and DDS- DAT-72, DAT-160, DAT-320
  • Exabyte 8mm 112m and 160m tapes & Mammoth 1 (Exabyte 8900), Mammoth 2
  • Sony IT and AIT-2, AIT-3 AIT-4, AIT-5 and SAIT
  • Travan TR-1, TR-3, TR-4 and TR-5 tapes
  • QIC tapes
  • QIC Mini-Cartridges
  • Tandberg SLR tapes
  • ADR and ADR2 tapes
  • 9 track 800/1600/6250 bpi
  • Next track
  • IBM 3480/3490/3592 tapes

Tape Backup and File Formats

  • Microsoft Tape Format (MTF) applications such as NT Backup and Symantec (Seagate/Veritas), BackupExec for Window, Backup Exec for NetWare
  • System Independent Data Format (SIDF) applications such as Novell’s Sbackup and Palindrome’s Backup Director
  • IBM Tivoli TSM
  • Computer Associates, Brightstore (Arcserve)
  • Previos/Stac Replica Backup for NT, NetWare
  • EMC (Legato) NetWorker (all platforms)
  • Symantec (Veritas) NetBackup, unix tar, cpio, fbackup, fsdump and ufsdump archives
  • Compaq/DEC VMS Backup
  • Commvault Galaxy/Simpana

For more information, please go to Seagate Recovery Services

What Is Data Loss?

July 17th, 2012 Comments off

Data loss is generally characterized by one or more of the following:

  • The inability to access any data from a previously functioning computer system or backup
  • The accidental deletion of files or the overwriting of data control structures
  • Corrupted or inaccessible files due to abnormal device operation or damage

Among other causes, data loss can be attributed to system or human error, adverse environmental conditions and device failure:

  • Human causes of data loss include intentional or accidental deletion or overwriting of files.
  • Virus damage, operating system or application software bugs, or failed upgrades may also cause data loss.
  • Common physical causes of data loss include power loss or power surge, overheating, electrostatic (“static”) discharge and any kind of physical damage to the storage device or medium.

Data Loss, A Growing Concern For Small Business

May 30th, 2012 Comments off

data-lossThe growing trend toward bring your own device(BYOD) in the workplace is putting company data at risk, according to a survey by Mozy and Compass Partners. Most (87 percent) small and midsize businesses have no formal policy in place regarding employees’ use of personal devices for work purposes — and 80 percent weren’t even concerned. About 33 percent of companies let employees make their own decisions about how to back up company and client data on their devices, and most companies lack adequate backup or data recovery plans for those devices.

Besides not backing up, employees are engaging in other risky behavior with their personal devices, including not having antivirus protection, leaving laptops alone in coffee shops or other public places, using public computers to access company networks and transferring unencrypted data.

Why it matters to your business: The risk of loss isn’t just theoretical. For example, 11 percent of the survey’s respondents said employee laptops have been stolen in the past, and in 98 percent of those cases, all of the lost data was never recovered. The “bring your own device” trend isn’t going away, but if you allow it, you do need to set some rules to protect your customers’ data, your data — and your business.

About Mozy
Mozy is the world’s most trusted online backup service for consumers and businesses, with more than three million customers, 70,000 business users and 70 petabytes of information stored at its multiple data centers around the globe. Mozy was acquired by EMC Corporation in 2007 and operates as part of Decho Corporation, an EMC company. More information can be found at www.mozy.com

About the Study
The study was executed by Compass Partners LLC, an independent market research firm focused on consumer technology. The study was fielded among 641 business decision makers responsible for the purchase of software and computer related services for small and medium businesses with 1 – 1,000 full-time employees. Field dates were October 24 through November 1, 2011. For each industry vertical sampled (each cell contained a minimum of 100 responses), the margin of error is +/- 9.8% at 95% confidence interval.

Categories: Data Backup Tags: ,

Fujitsu Data Recovery Services

February 3rd, 2012 Comments off

Data loss can result from many causes. These can include virus attacks, system malfunction, or human error in the handling or installation of the drive. Fujitsu highly recommends that users take standard measures to protect their data, the most important of which are frequent and regular backups, and diagnostic checks of your drives.

The list of Data Recovery Companies below are recognized by FCPA. If you utilize one of these companies for your data recovery needs, FCPA will not void your products warranty related to this activity. In all other instances, FCPA will void the product’s warranty if, when returned, it exhibits tampering and/or alterations (Please see our warranty exclusions statement).

Any agreement you may reach with one of these companies is a matter between you and the company you have selected. FCPA does not warrant the services provided by these companies and cannot be held liable for any damages or unsatisfactory performance.

DriveSavers
Tel: (800) 440-1904
Fax: (415) 883-0780
Website: www.drivesavers.com

Ontrack Data International, Inc.
Tel: (800) 872-2599
Fax: (952) 937-5815
Website: www.ontrack.com

Fujitsu does not itself perform data recovery services, nor does it recommend or authorize any specific data recovery company or its services.

If you have questions regarding your product’s warranty, you can call 888-664-0672.