On this page, we provide 4 fixes to help you remove the Windows Disk Boot Failure error and help you restore lost data with reliable file recovery software. Follow to remove this error and make your computer work again: Show
About Disk Boot FailureThe disk boot failure, or more specifically speaking, "DISK BOOT FAILURE - INSERT SYSTEM DISK AND PRESS ENTER", is an error that means Windows couldn't load correctly. Indicated from the error message, it asks you to insert a system disk. It means that the disk boot failure occurs because BIOS is unable to find a bootable drive to start up the computer during the startup process. SQL Server (all supported versions)Details
ExplanationYou might encounter the following error message in the SQL Server error log or the Windows Application event log.
You might also notice a sudden performance degradation with query execution and all other operations on the SQL Server. CauseSQL Server monitors the various memories related information about the SQL Server process. In this case, it has detected that the working set of the process is less than 50% of the committed process memory. As a result this warning is printed. The normal causes of this warning are:
User actionYou can prevent the Windows operating system from paging out the buffer pool memory of the SQL Server process by locking the memory that is allocated for the buffer pool in physical memory. You lock the memory by assigning the Lock pages in memory user right to the user account that is used as the startup account of the SQL Server service. But before you implement this solution, review the sections What causes SQL Server memory to be paged out and Important considerations before you assign the "Lock pages in memory" user right for an instance of SQL Server
Note Using Lock Pages in Memory ensure that the memory managed by SQL Server is not paged out. However, thread stacks, the EXE and any DLL images, heap memory, CLR memory can still be paged out by the OS. Starting with SQL Server 2008 SP1 Cumulative Update 2, both SQL Server Standard and Enterprise editions can use the Lock pages in memory user right. For more information about support for locked pages, view KB970070 - Support for Locked Pages on SQL Server Standard Edition (64-bit) systems. To assign the Lock pages in memory user right, follow these steps:
After you assign the Lock pages in memory user right and you restart the SQL Server service, the Windows operating system no longer pages out the buffer pool memory within the SQL Server process. However, the Windows operating system can still page out the nonbuffer pool memory within the SQL Server process. You can validate that the user right is used by the instance of SQL Server by making sure that the following message is written in the SQL Server Error Log at startup: "Using locked pages for buffer pool" This message applies only to SQL Server. For more information about this message in the ERRORLOG, visit the following: Do I have to assign the Lock pages for Memory privilege in Local System When the Windows operating system pages out the nonbuffer pool memory, you may still encounter performance issues. However, the error messages that are mentioned in the "Explanation" section are not logged in the SQL Server error log. What causes SQL Server memory to be paged outThere are three broad categories of problems that can cause this issue:
Below, you can find information on each of these categories
Important considerations before you assign the "Lock pages in memory" user rightYou should make additional considerations before you assign the Lock pages in memory user right. If you assign this user right on systems that are configured incorrectly, the system may become unstable or experience a performance decrease of the whole system. Additionally, event ID 333 may be logged in the event log. If you contact Microsoft Customer Support Service (CSS) for these problems, CSS engineers may ask you to revoke this user right for the user account that is used as the startup account of the SQL Server service. This step may be necessary to collect important performance data that CSS engineers can use for necessary configuration of the various options for SQL Server and for other applications that are running on the system. After CSS engineers collect the performance data, you can assign the Lock pages in memory user right to the startup account of the SQL Server service. Before you assign the Lock pages in memory user right, make sure that you capture a Performance Monitor log to determine the memory requirements of various applications and services that are installed on the system. These applications also include SQL Server. To determine the memory requirements, collect the following baseline information:
Ideally, you collect this baseline information during peak loads. Therefore, you can determine the memory requirements for various applications and components to support the peak load. The memory requirements vary from one system to another system, depending on the activities and the applications that are running on the system. You can query the information that is provided in the dynamic management view sys.dm_os_process_memory to understand whether the system is encountering low memory conditions. For more information, see sys.dm_os_process_memory (Transact-SQL). Improvements added in Windows Server 2008 and R2 versionWindows Server 2008 and Windows Server 2008 R2 improve the contiguous memory allocation mechanism. This improvement lets Windows Server 2008 and Windows Server 2008 R2 reduce to a certain extent the effects of paging out the working set of applications when new memory requests arrive. The following is an explanation of the improvements from the Microsoft whitepaper "Advances in Memory Management in Windows": In Windows Server 2008, the allocation of physically contiguous memory is greatly enhanced. Requests to allocate contiguous memory are much more likely to succeed because the memory manager now dynamically replaces pages, typically without trimming the working set or performing I/O operations. In addition, many more types of pages—such as kernel stacks and file system metadata pages, among others—are now candidates for replacement. Consequently, more contiguous memory is generally available at any given time. In addition, the cost to obtain such allocations is greatly reduced. For more information, view SQL Server Working Set Trim Problems. The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products. |