Data Recovery Links http://www.datarecoverylinks.org/blog Data Recovery Links Tue, 02 Jan 2007 10:45:35 +0000 http://wordpress.org/?v=2.0.5 en SQL Server Database Recovery http://www.datarecoverylinks.org/blog/sql-server-database-recovery http://www.datarecoverylinks.org/blog/sql-server-database-recovery#comments Tue, 02 Jan 2007 10:42:09 +0000 Keenu Database Recovery http://www.datarecoverylinks.org/blog/sql-server-database-recovery SQL Server and Oracle is a RDBMS (relational database management system) which stores their data in SQL databases. Many companies use SQL Server and Oracle to store and manage their data. What happens if after rebooting the server the database doesn’t attach and your backup is corrupt, incomplete or outdated? Have you ever had a drive containing SQL data crash and the files were recovered by a data recovery company but the SQL database is corrupted? One unreadable sector inside a SQL database will not allow the file to attach. SQL recovery from drive failure is, more often than not, a two-stage process. First, the physical data (raw sectors) must be recovered in order to gain access to the logical data. If the database will not attach to SQL server then the second stage is SQL recovery. Media in database servers suffers from the same failure points as drives in personal computers.

Even the best-configured system can fail due to:

  • Corrupted database
  • Torn page detection
  • Deleted data (tables, records, system objects)
  • I/O errors in SQL server
  • Deleted or corrupted log file
  • Database in “suspected” mode
  • Unable to restore from corrupted backup file

Is it possible to recover? In most cases it is possible to repair the database to an attachable state. If we are unable to repair the database to a point to where it will attach, then we will recover as many tables and records as possible for you with our specialized software tools. This recovered data can then be merged back into an empty database that your front end application will work with:

Getting Started: If the failure mechanism is hardware or file system corruption, then we would require the original media to be sent to us. This is because file fragmentation can scatter pieces of the database and log file all over the media. These pieces must be collected and reassembled so we can start our analysis. If the database was corrupted by some other means then a copy on any media will do.

What can you do to help us? Third party SQL recovery and utility programs can cause damage beyond our ability to recover the files so please don’t try anything on the original files. For database repair and/or scavenging, it will save time if you can furnish us with the database structure (perhaps an empty database or backup) and a list of prioritized tables.

After determining what steps will be necessary to complete your recovery, we will contact you for approval. No work will be done without your approval. As soon as you approve the recovery, our technician will continue with the recovery effort, by analyzing the database and records containing your data. This data can then be extracted and the database rebuilt.

 

]]> http://www.datarecoverylinks.org/blog/sql-server-database-recovery/feed/ Hard Drive Recovery http://www.datarecoverylinks.org/blog/hard-drive-recovery http://www.datarecoverylinks.org/blog/hard-drive-recovery#comments Tue, 02 Jan 2007 10:33:15 +0000 Keenu Data Recovery http://www.datarecoverylinks.org/blog/hard-drive-recovery

Today data recovery is a multi-million dollar industry. The number of data recovery firms out there seems to exceed the number of fast food restaurants for the entire planet. These companies specialize in helping their clients retrieve data on anything from hard drives to flash-roms.

In the following report, we will discuss what data recovery really is; the different types, the costs, and what you can realistically expect when it comes to getting your hard drive data recovered.

What To Do In The Event Of Data Loss?

Around 44% of all data loss is caused by hardware failure. It’s important to make sure that you immediately shut your system down if you suspect that hard drive has crashed. Don’t even try to go through the shutdown procedure, just pull the plug from the wall. Do not try to run off the shelf data recovery software or drive utilities.

Many times these applications will assume the drive is functioning properly and will increase the risk of permanent data loss.

Types Of Hard Drive Failure.

When we discuss hard drive data recovery in this report, we will primarily focus on issues surrounding hard drive failures; since these types of failures are most common. There are really two primary forms of failure in a hard drive, logical and physical. Logical failures are usually a result of file-system corruption. This can occur due to a virus, accidental deletion of key files or registry components, and in some cases even electro-static discharge. In most cases where a logical failure has occurred, the drive is still recognized by the system BIOS, but it will not boot. In most cases, your data should still be intact on the drive, even though it may appear to be inaccessible. If the system BIOS does not detect the presence of the hard drive, then chances are a physical failure has occurred. Physical failures can result from a wide variety of causes.

There are really two sub-categories for physical hard drive failures; mechanical and electronic. Mechanical failures usually result from a failure of the spindle motor. Spindle motor failure can result from excessive heat due to a bearing failure. The increased heat resulting from the bearing failure will expand the drive shaft and therefore seize the spindle motor. Suddenly, your drive will become inoperative. Occasionally, you will get a warning that something bad is about to happen. You may hear a loud whining, a grinding noise, even high-pitched screeches. If anything like this starts to occur, BACK UP YOUR DATA IMMEDIATELY.

Another physical issue that sometimes rears its ugly head is an electronic failure. If you look at a hard drive you will notice a circuit board on the bottom. This board is basically the brains of the drive, and it is where the computer interfaces to the hard drive. An electrical failure can occur unexpectedly at any time. Even brand new hard drives are not totally immune to having electrical failures. Sometimes it’s just a faulty component, sometimes it’s improper installation (i.e. electro-static discharge, grounding out the board, damaging circuitry during installation). It’s important to also keep your system clean and well ventilated, since excessive heat can damage the electrical components on the drive. If you have a system that is in a somewhat contained area, you may look at adding an additional 80mm fan to cool the internal components of the system, especially the hard drive. No other component of a computer works as much as the hard drive, and therefore it is vitally important not to overlook it when cooling issues arise. A simple step like this can help against needing hard drive data recovery services…

 

 

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