Partitions created on a basic disk are called basic volumes. An administrator can create more than one basic volume by partitioning the hard disk for the purpose of organizing the files and folders or supporting multiple operating systems on a single hard disk.
On a basic disk, three types of partitions can be created, namely primary, extended, and logical. An administrator can configure a maximum of four primary partitions on a computer running the Windows XP operating system. Although the administrator can configure any of the created primary partitions as an active or bootable partition, he can view only one primary partition with a drive letter at a time since only one primary partition is active at a time. Other primary partitions are invisible and are not assigned a drive letter. An extended partition allows administrators to exceed the limit of primary partitions that can be created on a hard disk. An extended partition serves as a shell in which a user can create unlimited logical partitions. Logical partitions are visible and generally used to organize files.
In addition to the basic disk, Windows XP Professional also supports the dynamic disk, which overcomes the limitations of the basic disk. Dynamic disks are actually physical disks that are created and managed with the Disk Management utility in Windows XP. Dynamic disks provide several new features that cannot be performed on basic disks. Dynamic disks do not use partitions or logical drives. Instead, they use dynamic volumes to subdivide physical disks into one or more drives. Three types of dynamic volumes can be created on a Windows XP-based computer, namely simple, spanned, and striped.
Using the Disk Management tool, a user can manage the hard disk very effectively. He can create primary, extended, as well as logical partitions. It is necessary to format a volume to let it accept data. By using Disk Management, a user can format volumes, assign drive letters to the formatted volumes, and change the default drive letters. He can choose a file system for a particular volume and configure the default cluster size for any of the file systems. By using Disk Management, users can also enable file and folder compression on NTFS volumes.
Windows XP allows mounting of volumes by using a path instead of assigning a drive letter. Mounted volumes allow administrators to extend the available space on an existing volume without extending the actual size of the volume. Administrators can create multiple volume mount points for a particular volume. Using Disk Management, administrators can add volume mount points to an existing volume.
Windows XP Professional also allows administrators to avail of the features of dynamic disks by converting the basic disks to dynamic disks without losing the existing data. By using Disk Management, different dynamic volumes can be created and managed. As we know that dynamic disks are not supported by all the operating systems, it becomes necessary to use the basic disks. Windows XP Professional provides a feature to accomplish this. It can be used to revert from dynamic disk to the basic disk.
Another feature that Windows XP Professional supports is extending volumes on both basic as well as dynamic disks. On basic disks, it can be accomplished by running the DISKPART command-line utility and on dynamic disks, either by using the Disk Management tool or the DISKPART command.
Extensions of primary partitions and logical drives on basic disks require the following conditions to be fulfilled:
A volume can be extended by running the DISKPART utility from the command line, by selecting the volume, and then by executing the following command:
EXTEND [SIZE=N] [NOERR]
On dynamic disks, simple volumes formatted with only the NTFS file system can be extended by attaching additional unallocated space from the same disk or from a different disk. Unlike basic disks, space on dynamic disks need not be contiguous.
Moving Disks: Windows XP Professional enables administrators to install disks into another computer that is using the operating system that supports the dynamic disk feature. Moving disks to other computers proves to be very useful in case a computer fails and the hard disk is still functional.
Windows XP allows managing disk-management tasks by running the DISKPART command from the command prompt and creating scripts for automating the frequently performed tasks.
Windows XP provides several efficient disk maintenance features such as the CHKDSK, DISK DEFRAGMENTER, and DISK CLEANUP utilities. The CHKDSK command is used to verify and repair the integrity of the file system on a volume. Defragmentation is a process of rearranging the several pieces of files and folders on the disk into contiguous spaces. Disk Defragmenter, a maintenance tool, supported by Windows XP, enables a user to defragment a hard disk and consolidate the free space on the hard disk. This improves the performance of the computer to a great extent. Windows XP also provides a command-line version of the Disk Defragmenter utility, called the DEFRAG.EXE command, which can be used to perform all the maintenance tasks that Disk Defragmenter does. When the hard disk of a computer is becoming low on available space, then a user can delete unnecessary files (such as Temporary Internet files, Temporary Offline files, Recycle Bin, etc.) by using the DISK CLEANUP utility to increase the available free space.
In the end, we can conclude that Windows XP Professional and Home Edition, with their advanced disk management and maintenance features, facilitate the administrators effectively in performing their tasks. It is for this and many other reasons that Windows XP is being used to a great extent in many large organizations.
uCertify was formed in 1996 with an aim to offer high quality educational training software and services in the field of information technology to its customers. uCertify provides exam preparation solutions for the certification exams of Microsoft, CIW, CompTIA, Oracle, Sun and other leading IT vendors. To know more about uCertify, please visit http://www.ucertify.com/