Consider a scenario where you delete few of your very important files from your computer system. Or, you face corruption and all your important data and files become inaccessible. The situation is still under control here as you’re having a backup file. You try to restore your data from it, but you just can’t. You find the backup file is itself corrupt. Now the question is how to repair BKF file, so that you can restore your data from it.
You must have faced situations of data loss once or often in your day to day life. It’s one the most common and vicious experiences a computer user can ever face. In such a critical state, all our data which we’ve created, collected and managed with a lot of hard work, may be lost forever. Under this circumstance, a backup file acts like a lifesaver for a computer user. A backup or BKF file contains all the backed up copies of your data which you can restore at any time with ease. You can restore almost all the data and files from the backup file if you come across data loss situation due to accidental deletion or corruption. Through this post, I’ll give you a brief information on backup, its common types. Also, we’ll discuss the most common reasons for corruption and how to repair BKF file.
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Being a smart computer user, you must take backup of your crucial data and files in order to avoid data loss situation.
Backup is a process in which creates backup copies of your computer data and stores them inside a file, called BKF or backup file. A backup file is very useful for restoration of data at the time of data loss or data corruption. Make sure the backup file is valid and you regularly update it, otherwise it fails to restore anything from it. You can easily take backup of you computer data and files by using a free utility, known as NT-Backup utility for Windows. Also, you can use few commercialware like Symantec Backup Exec (VERITAS) for creating backup files.
Common Backup Types – What you choose…
Before you can take backup of your computer data, you must choose the right backup type.
If you’re looking for the most basic and complete type of backup, Full Backup best fits your needs. This type of backup makes a copy of all the data stored on your computer system to any other storage media drive. Such storage media device can be anything like tape, disk or DVD/CD. The primary objective of full backup is to provide a complete copy of the entire data on a single set of media. This will take minimal time for data restoration from the backup. There are two major disadvantages of this backup type. First, it may take more than enough time to perform full backup than any other backup type. Secondly, it may require more storage space as you’re taking full backup.
Generally, full backup is run only on periodic basis. If you’re having a small amount of data or critical applications, you must choose full backup type for daily basis, or even more often in some cases. Typically, a backup operation employs a full backup in combination with either incremental or differential backup.
If you choose Incremental Backup, it’ll copy only the data which have changed since the last backup operation of any type. It uses the modified time stamp on files and compares them to the time stamp of last backup. Backup applications track and record the date and time that backup operations occur in order to track the files which are modified since these operations. You can run incremental backup as often as required because it’ll only copy data since the last backup of any type. This means incremental backup will only store the most recent changes. If you’re performing incremental backup operation, it’ll copy a smaller amount of data than full backup. Due to this, it takes minimal time to complete the backup operation. Also, it requires less storage space on media to store backup.
When you perform differential backup very first time, you’ll find it similar to incremental backup type. It successfully copies all the data changed from the previous backup. However, there’s a major difference between differential and incremental backups. Each time you run differential backup afterwards, it’ll continue to copy all the data changed since the previous full backup. As compared to incremental backup, it’ll store more data on subsequent operations. But it’ll store far less data than a full backup. Also, differential backup requires more storage space as well as time to complete than incremental backup, although less than full backup.
|Backup Number||Full Backup||Incremental Backup||Differential Backup|
|Backup #1||All data||NIL||NIL|
|Backup #2||All data||Changes from backup 1||Changes from backup 1|
|Backup #3||All data||Changes from backup 2||Changes from backup 1|
|Backup #4||All data||Changes from backup 3||Changes from backup 1|
Unluckily, a backup file can become inaccessible due to corruption. While restoring a corrupt backup file, you’ll receive an error message:
Corruption is the main cause behind such errors. As a backup file is not immune to corruption, there are numerous reasons which are highly responsible. Before discussing how to repair BKF file, let’s find out the most common reasons below:
Reasons for Corrupt Backup File
Virus can make unwanted changes into your computer data and files including BKF files. Due to virus infection or bugs attack, you BKF files can become corrupted or inaccessible.
A system hard disk may crash at any time due to any reason. This can make all the stored data inaccessible or corrupted. If the BKF files are stored in that part of the hard disk which is badly crashed, the files can’t be used any more.
If a system gets shut down in an improper way, it can cause a serious damage to the system hardware, i.e. hard disk, and the data stored in it. Sudden system shutdown can also cause corruption in the BKF files.
A backup job refers to a process of backing up the data as well as restoring data from a BKF file. If any interruption takes place while performing backup job, it may harm your BKF file.
Catalogue files play a major role in a BKF file. They store all the related information of your backed up data. If any catalogue file is missing from the backup, it becomes unusable and you can’t restore your data from it.
If you receive CRC failed error while opening or restoring data from a backup file, it means the file has some issues and you can’t restore your data from it. CRC means Cyclic Redundancy Check.
If the backup application, be it NT-Backup utility or Backup Exec, has some functioning errors or bugs, it may result in corrupt BKF file. A faulty application always generates suspected output.
Malfunction refers to a state in which a computer software or hardware starts acting or functioning abnormally. It also includes collision of software programs with one another. This may lead corruption in computer data and files.
Just because any of the reasons aforementioned, a backup file may become inaccessible and you can’t restore data from it. Due to corruption, you’ll receive an error message on the screen.
The most common error messages are:
- Cannot Restore BKF File In Windows 7.
- An inconsistency was encountered on requested media.
- The backup file is unusable. You must erase it, or choose another file.
- The backup file contains unrecognized data and cannot be used.
Some of the error codes are given below:
- 0x80070724: Incompatible version of the serializing package.
- 0x80070005: Create a manual restore point the following may be displayed – Access is Denied.
- 0x8007007B: The filename, directory name, or volume label syntax is incorrect. System Restore will now close.
- 0x80040154: Volume Shadow Copy Service error: Unexpected error calling routine.
- 0x8007000E: System Restore fails with error in the Windows Recovery Environment.
- 0x8007000E: File Backup fails with the following error code- Not enough storage is available to complete this operation.
- 0x81000109: The Restore point could not be created for the following reason- Windows cannot create a shadow copy due to internal error in other system components.
- 0x800423F4: Complete PC Backup fails with the following error code- The writer experienced a non-transient error. If the backup process is retried, the error is likely to reoccur.
- 0x80070057: File Backup fails with the following error – The parameter is incorrect.
- 0xC00000EA: An error occurred. The following information might help you resolve the error: If an MM error is returned which is not defined in the standard FsRtl filter, it is converted to one of the following errors which is guaranteed to be in the filter. In this case information is lost; however, the filter correctly handles the exception.
- 0x80071A91: Transaction support within the specified file system resource manager is not started or was shut down due to an error.
Consider the scenario given below:
You accidentally delete some of your important data or files, or you lose them due to corruption. Luckily, you’ve backed up the data earlier. So you can restore the deleted or lost data from the BKF file. You open the BKF file with the same utility (by using which you’ve backed up the data), but you find that the BKF file is invalid, i.e. corrupt. Neither you can open the file, nor can you restore anything from it. The only thing you can do here is repair BKF file.
How to repair BKF file?
What will you do in such situation? You need an advanced BKF Recovery tool that can help you recover your data from the corrupt BKF files. As there’s no manual solution available to repair BKF file or restore data from it, the only thing you can try here is a professional recovery solution.
SysInfoTools Backup Exec BKF Repair Pro tool helps you repair BKF file and recovers valuable data in their original form. It supports recovery from corrupt backup files originally created by Windows NT-Backup as well as Symantec Backup Exec (formerly known as VERITAS). It also supports recovery of compressed BKF files as well as split BKF files. If your corrupt BKF files contain SQL database.mdf files, you can restore them too by using this smart recovery software.