The page is the fundamental unit of data storage in SQL Server. An extent is a collection of eight physically contiguous pages. Extents help efficiently manage pages. This guide describes the data structures that are used to manage pages and extents in all versions of SQL Server. Understanding the architecture of pages and extents is important for designing and developing databases that perform efficiently.
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The index key of a clustered index can't contain varchar columns that have existing data in the ROW_OVERFLOW_DATA allocation unit. If a clustered index is created on a varchar column and the existing data is in the IN_ROW_DATA allocation unit, subsequent insert or update actions on the column that would push the data off-row will fail. For more information about allocation units, see Index architecture and design guide.
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Starting with v2.1.0, XClarity Administrator utilizes Windows UpdateXpress System Packs (UXSPs) to enable the update of the OS device drivers on deployed Windows operating systems. Windows UXSPs contain Windows device drivers for supported Windows versions and for Lenovo servers that supports Windows. You can download or import Windows UXSPs in the repository. UXSPs must be available in the repository before you can update Windows device drivers on managed severs.
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