Posted on Monday, November 22, 2010 at 3:58 AM
DBCC CHECKALLOC is a common command that is used by database users to check the consistency of disk space allocation. The command comprehensively examines the use and allocation of all pages in your specified database. However, if examining the pages, the command displays an error message, then it means that your database pages have been corrupted or damaged. Furthermore, the data stored in the database becomes inaccessible after the error message appears. An ideal way to access your data in such situations is by restoring the data from an updated backup. But if in case, your database backup has been corrupted or damaged, then you will need to use advance SQL Repair application to repair your database.
As a practical instance, you encounter the below error message when you run DBCC CHECKALLOC command:
"Table error: Page %S_PGID is allocated to object ID %d, index ID %d, not to object ID %d, index ID %d found in page header."
After the above error message appears, the data stored in the database becomes inaccessible...
Posted on Tuesday, November 09, 2010 at 4:51 AM
You must have encountered the table error messages while accessing the MS SQL Server database tables. These errors occur because of some integrity issues in the database tables. Sometimes, the integrity issues can take place because of having a corrupt database. And a database can get corrupted because of various internal and external issues such as virus attacks, human errors like improper system shutdown especially when the database is open, sudden power fluctuations, data integrity issues due to mishandling the database such as changing the structure of the database, multiple users trying to change the database table simultaneously, etc. Because of the table errors you can face various problems such as partially or completely inaccessible database, retrieving corrupt records, regularly displaying error and warning messages, and so on. These problems are bound to pose serious threats especially when you are working on a real-time environment. To counter such situations, you can restore the database by overwriting it with its updated backup. However, if the backup is not the updated one then you will have to use the advanced SQL Database Recovery application to repair the corrupt database...
Posted on Wednesday, September 22, 2010 at 4:23 AM
The smallest unit of database that SQL Server works with is 8Kilobyte (KB). This 8Kilobyte chunk of database is called pages. SQL Server stores data on the disk in pages form. In Memory also SQL Server database manipulates those same 8 Kilobyte (KB) chunks.
Whole record or row must fit within 8KB chunk (page) when data is written to the disk. Sometime a single page can share more than one row. A row cannot span multiple pages. For Example: If an employee table has employee name, address, city, street, house, state, zip, phone then all that combined data must be written in less than a page or 8kilobyte (KB). Few data types like Binary data, LOB of text files and many more which store pointer to the real data can be spread across multiple pages or even in file. All these data are gathered in to the data files on the disk which has either .MDF or .NDF as file extension...
Posted on Tuesday, July 06, 2010 at 2:10 AM
As you store more and more data to your Microsoft SQL Server database, the size of database increases and the performance of Microsoft SQL Server decreases day by day. Large size of database may also cause system crash and sometimes database corruption. To prevent such situations, MS SQL Server provides SHRINKFILE and SHRINDB tools for reducing size of the database. However, in some cases, these tools fail to shrink the database and problem remains intact. At this point, if database corruption occurs, SQL database repair becomes need of hour.
As a practical example of this behavior, you may come across the following error message when you try to reduce size of the SQL Server 2000 database using SHRINKFILE, SHRINKDB, or SQL Server Enterprise Manager:
"2002-11-25 22:41:30.18 spid55 Time out occurred while waiting for buffer latch type 4,bp 0x3d03340, page 1:37939357), stat 0xb, object ID 8:8:0, EC 0xB39B55E0 : 0, waittime 300. Not continuing to wait...
Posted on Tuesday, June 29, 2010 at 5:31 AM
Are you facing problems while working on your SQL Server 2000 database? Are you getting lot of error messages for some tasks that worked fine previously? Or the database is responding too slowly? If all your answers are in YES, then chances are that the database has corrupted. It may have corrupted due to various reasons such as virus infections, power outages, hardware malfunctioning, etc. To resolve such issues, you can perform in-place resolving techniques. If you are not able to address the situation, then you should use a third-party
SQL database repair software to repair SQL database.
Consider a scenario wherein you encounter the following error message while working on the SQL Server 2000 database:
"Minimally logged extents were found in GAM interval starting at page P_ID but the minimally logged flag is not set in the database table."
Cause:...
Posted on Monday, June 28, 2010 at 4:04 AM
An IAM (Index Allocation Map) page consists of eight page Ids, collectively called mixed page array, and holds the pages that are allocated to the index. The IAM pages are used to optimize the tables by allocating and deallocating storage space. Sometimes the IAM page is not able to perform as expected. Such corruption instances can occur because of various reasons such as hardware malfunctions, virus infections, power outages, abruptly exiting SQL Server, etc. To resolve such situations, you should use appropriate corrective measures. In case, you are not able to recover SQL database then you should use a third-party
SQL database repair software to do so.
Consider a scenario wherein you encounter the following error message while working on an SQL Server 2000 database:
"
Page P_ID in database ID DB_ID is allocated in the SGAM SGAM_P_ID and PFS PFS_P_ID, but was not allocated in any IAM. PFS flags 'PFS_FLAGS'."
Cause:...
Posted on Thursday, May 13, 2010 at 5:08 AM
An MS SQL Server database is built of numerous pages, each containing actual data saved in the database components, like tables, views, and more. Every single page is further marked by a header, which consists of critical page information like page type, total free space left in the page, and page number. While every page contains a specified index, there might be situations when the page might point to an incorrect index. This mainly happens when the SQL Server database is logically damaged. In most of these situations, the database becomes unmountable, rendering to inaccessibility of all its saved records. To access the records in these situations, the database administrator needs to repair the database using DBCC CHECKDB command. While the command shows positive results in most cases, it might fail to repair the database in a few situations. In such cases, if the administrator has not created any database backup, then s/he needs to use a commercial
SQL Database Repair application...
Posted on Monday, May 10, 2010 at 11:03 PM
The most basic unit of storage in SQL Server is a page, which has a size of 8 KB. One of the page types is the IAM (Index Allocation Map) page that holds information regarding extents. The page contains location information of first eight pages. The IAM pages are mixed pages, but they do not reference among themselves. Besides this, an IAM page contains an array of mixed pages of eight page Ids, to hold these pages that are allocated to the index. However, sometimes the database may report corruption errors in these IAM pages. These pages can get corrupt due to various reasons such as hardware issues, human errors, virus infections, etc. In such cases, you should preform appropriate measures to resolve the issue. However, if you are unable to address the case then you should use a third-party MS SQL repair software to perform SQL repair of corrupted database components.
Consider a scenario wherein you are working on a SQL Server 2000 database and you encounter the following error message:...
Posted on Thursday, May 06, 2010 at 4:50 AM
The tempdb database is one of the system databases in SQL Server. It is used to store the temporary tables, table variables, etc. The tempdb is recreated every time SQL Server is started. This way, the system always starts with a fresh copy of the tempdb database. However, sometimes the tempdb gets corrupt because of various issues such as power outages, virus infections, human errors, abrupt system shutdown, etc. In such cases, you should take appropriate corrective measures to resolve the issue. However, if you are not able to do so then you should use a third-party
MS SQL repair tool to repair SQL database.
Consider a scenario wherein you are performing allocation checks on the tempdb database. But the process terminates abruptly and an error message is displayed, that is:
“Database tempdb allocation errors prevent further CHECKNAME processing.”
Cause:...
Posted on Tuesday, May 04, 2010 at 9:32 PM
MS SQL Server is a relational database management system (RDBMS) that is used for providing enterprise solution in many organizations. It is fast, reliable, scalable, and a very robust database server to work with. However, at times it can pose some problems due to virus infections, human errors, power surges, abrupt system shutdown while database is open, etc. Due to such issues, the database can become corrupt. In such cases, you should take appropriate corrective measures to resolve the issue. However, if you are not able to address the problem then you should use a third-party MS
SQL server recovery software to recover SQL database.
Consider a scenario wherein you encounter the following error message while working on an MS SQL Server 2008 database.
“Table error: Object ID O_ID, index ID I_ID, partition ID PN_ID, alloc unit ID A_ID (type TYPE). Duplicate keys on page P_ID1 slot SLOT1 and page P_ID2 slot SLOT2.”
Cause:...
Posted on Monday, May 03, 2010 at 10:08 PM
MS SQL Server 2008 is a remarkable relational database management system (RDBMS) server. It uses two languages to query the database, T-SQL and ANSISQL. It is scalable, always available, high on performance, and possess powerful business intelligence (BI) tools. So, all in all, it is quite an effective product for your enterprise. However, sometimes the SQL database can get corrupt because of various reasons such as virus infections, hardware issues, power surges, human errors, etc. In such cases, you should try to replace the corrupted database with a clean and updated backup. However, if the backup is not updated then you should use a third-party MS
SQL server repair software to repair SQL database.
Consider a scenario wherein you are working on SQL Server 2008. While working on the system, you run the
“Table error: Object ID O_ID, index ID I_ID, partition ID PN_ID, alloc unit ID A_ID (type TYPE), page P_ID, row ROW_ID. Record check (CHECK_TEXT) failed. Values are VALUE1 and VALUE2.”...
Posted on Saturday, May 01, 2010 at 1:54 AM
MS SQL Server is a relational database management system (RDBMS) that is specifically developed to be used in the enterprise environment. It provides increased productivity, efficiency, availability, and administrative ease to your organization. However, as is the case with most of the applications it too can face some errors that may lead to data corruption. The data corruption cases may arise because of various issues such as power surges, virus infections, human errors, abrupt shutdown when the database is open, etc. In such cases, you should replace the database with an updated backup. However, if the backup is not updated and you need the data urgently, then you should use an
SQL MDF repair tool that will help you to repair SQL database.
Consider a scenario wherein you have got MS SQL Server installed on your system. One fine day, when you open the SQL Server database, it fails to open. An error message is displayed:...
Posted on Thursday, April 29, 2010 at 5:25 AM
MS SQL Server 2008 is the latest version of SQL Sever. It has been designed with the SQL Server Always On technologies that minimize the downtime and maintain appropriate levels of application availability. These technologies also enable data management self-tuning, self organizing, and self maintaining of the databases. However, sometimes the databases may get corrupt or become inaccessible because of various reasons such as virus infections, power surges, human errors, etc. To resolve these issues you should consider taking appropriate measures. In case, you are not able to address the situation then you should repair SQL database using a third-party
SQL database repair application.
Consider a scenario wherein you are using MS SQL Server 2008 and encounter the following error message:
“The %.*ls count for object "%.*ls", index ID %d, partition ID %I64d, alloc unit ID %I64d (type %.*ls) is incorrect. Run DBCC UPDATEUSAGE.”...
Posted on Wednesday, April 28, 2010 at 9:40 PM
MS SQL Server is the most preferred relational database management system by database users all over the world. It provides several benefits such as enhanced productivity, scalability, efficiency, availability, and administrative ease. However, at times the SQL database gets corrupt and, thus, becomes inaccessible. It can happen because of many reasons such as virus infections, human errors, power surges, media errors, etc. In such cases, replace the corrupted database with its updated backup. However, if the backup is not updated and you want the database to be restored urgently then you should use a third-party
sql database repair tool to repair sql database.
Consider a scenario wherein you open a database file (.mdf) but it fails to open. Instead, an error message is displayed:
“C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\MYDATABASE.mdf is
not a primary database file. (Microsoft SQL Server, Error: 5171) ”...
Posted on Tuesday, April 27, 2010 at 3:23 AM
In MS SQL Server database, a PFS (Page Free Space) page has one byte for each of the pages existing in the file interval it maps. This byte contains a bit that indicates that the associated page is a mixed page. An IAM page includes a mixed page array, which is an array of eight page IDs, to keep the mixed pages that have been allocated to the index. In some cases, when the database goes corrupted, the page containing 'mixed page' bit is not recognized correctly. Thus, you can detect such specific cases of database corruption and, take corrective measures for
MS SQL Repair.
Most of the SQL database corruption problems can be analyzed and detected by running DBCC CHECKDB command. Let's consider the below error message, which typically appears when the discussed problem occurs. When you run DBCC CHECKDB command to check the integrity of database, following error might pop up:
Server: Msg 8906, Level 16, State 1, Line 0...
Posted on Friday, April 23, 2010 at 2:56 AM
All the users connected to the SQL Server instance have access to a global resource called tempdb system database. This database holds temporary user objects, internal database objects, and row versions that result from data modification. At times, when some allocation checks are performed on this TEMPDB database, they may result in allocation errors and unexpected results. Since TEMPDB cannot be put in offline mode, no fixes are possible for allocation errors in this database. However, for rest of the SQL databases, you can perform
MS SQL Repair using suitable tools and utilities.
For exemplifying the given problem, consider, you might start receiving unexpected database access problems in MS SQL Server database. To determine the exact cause of the problem, you run CHECKDB command and the below error message pops up:
“Database tempdb allocation errors prevent further CHECKNAME processing.”...
