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March 24, 2003—In this issue:
1. COMMENTARY
2. FAQS
- Q. What's the Diskpart utility?
- Q. How can I use Diskpart to extend a volume?
- Q. How can I use Diskpart to create a mirrored disk?
- Q. How can I use Diskpart to create a RAID 5 set?
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- Windows & .NET Magazine Connections: Win A Florida Vacation
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4. CONTACT US
- See this section for a list of ways to contact us.
1. COMMENTARY
(contributed by John Savill, FAQ Editor, [email protected])
This week, I explain the Diskpart utility that comes as part of the "Microsoft Windows 2000 Server Resource Kit" and "Microsoft Windows 2000 Professional Resource Kit." Specifically, I tell you how to use Diskpart to extend a volume, create a mirrored disk, and create a RAID 5 set.
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2. FAQS
Q. What's the Diskpart utility?
A. Diskpart is similar to the MS-DOS Fdisk utility, which lets you create and view partitions from the command line. However, Diskpart does much more than Fdisk. In addition, the Diskpart UI matches the graphical interface of the Microsoft Management Console (MMC) Disk Management snap-in.
Diskpart is part of the "Microsoft Windows 2000 Server Resource Kit" and the "Microsoft Windows 2000 Professional Resource Kit." (Microsoft includes Diskpart as a core utility in Windows Server 2003 and Windows XP.) You can download the tool for free from Microsoft's Web site.
To run Diskpart, type
diskpart
at the command prompt, then press Enter. Rather than relying on command-line execution, you actually run commands inside the Diskpart environment. When you're finished, type
exit
to leave the Diskpart environment. For example, the screen might display
C:\Documents and Settings\john>diskpart Microsoft Diskpart version 1.0 Copyright (C) 1999-2001 Microsoft Corporation. On computer: TRINITY DISKPART> exit Leaving Diskpart... C:\Documents and Settings\john>
during a Diskpart session.
Q. How can I use Diskpart to extend a volume?
A. You can use the Diskpart utility from the "Microsoft Windows 2000 Server Resource Kit" or the "Microsoft Windows 2000 Professional Resource Kit" to extend an existing volume by performing the following steps:
- Download the Diskpart utility from the Microsoft Web site, then install it on your computer.
- Go to Start, Run, then type
cmd
to start a command-line session. - Type
diskpart
to start a Diskpart session. - Type
list volume
to list the current volumes. The list will look likeVolume ### Ltr Label Fs Type Size Status Info ---------- --- ------------------- ----- -------- ------- Volume 0 C NTFS Partition 10 GB Healthy System Volume 1 D Data NTFS Partition 9 GB Healthy Pagefile
- Type
select volume
to select the volume you want to extend. - Type
extend
to extend the selected volume. If you don't pass any parameters, Diskpart will use all unpartitioned space on the current disk. Alternatively, you can typeextent size=
to set a size and disk to use for the extension.disk= - Type
exit
when you're finished.
You can extend only volumes created on a dynamic disk, not volumes created on a basic disk that you've upgraded. If you try to extend volumes created on a basic disk, you'll receive the error "Diskpart failed to extend the volume. Please make sure the volume is valid for extending."
Q. How can I use Diskpart to create a mirrored disk?
A. You can use the Diskpart utility from the "Microsoft Windows 2000 Server Resource Kit" or the "Microsoft Windows 2000 Professional Resource Kit" to either create a new mirrored disk or mirror an existing disk. (Be aware that Windows XP doesn't support mirrored disks.) To create a new mirrored disk, perform the following steps:
- Download and install the Diskpart utility from the Microsoft Web site.
- Go to Start, Run, then type
cmd
to start a command-line session. - Type
diskpart
to start a Diskpart session. - Type
list disk
to list the current disks. The list will look likeDisk ### Status Size Free Dyn Gpt -------- ------ ---- ------- ---- --- Disk 1 Online 28 GB 6621 MB * Disk 2 Online 12 GB 12 GB * Disk 3 Online 29 GB 29 GB *
- Type
select disk 2
to select disk 2 as the disk on which you want to create the mirror. - Type
create volume simple size=100
to create a new volume. - Type
add disk 3
to add disk 3 as the new disk that will become the mirror.
To add a mirrored disk to an existing disk, perform the following steps:
- Download and install the Diskpart utility from the Microsoft Web site.
- Go to Start, Run, then type
cmd
to start a command-line session. - Type
diskpart
to start a Diskpart session. - Type
list disk
to list the current disks. The list will look likeDisk ### Status Size Free Dyn Gpt -------- ------ ---- ------- ---- --- Disk 1 Online 28 GB 6621 MB * Disk 2 Online 12 GB 12 GB * Disk 3 Online 29 GB 29 GB *
- Type
select disk 1
to select disk 1 as the existing disk that you want to mirror. - Type
list partition
to list the current partitions. The list will look likePartition ### Type Size Offset ------------- ------------ ------- ------ Partition 1 Dynamic Data 10 GB 32 KB Partition 2 Dynamic Data 6001 MB 10 GB Partition 3 Dynamic Data 6001 MB 16 GB Partition 4 Dynamic Data 6621 MB 21 GB
- Type
select partition
to select the partition for which you want to add a mirrored disk. - Type
add disk
to add a new disk, which will mirror the disk you selected in Step 5.
Q. How can I use Diskpart to create a RAID 5 set?
A. A RAID 5 set consists of data spread across three physical disks, of which one can fail without causing any data loss. To use the Diskpart utility from the "Microsoft Windows 2000 Server Resource Kit" or the "Microsoft Windows 2000 Professional Resource Kit" to create a RAID 5 set, perform the following steps:
- Download and install the Diskpart utility from the Microsoft Web site.
- Go to Start, Run, then type
cmd
to start a command-line session. - Type
diskpart
to start a Diskpart session. - Type
create volume raid size=
wheredisk= is the amount of space you want to use from each disk (in megabytes) and are the numbers of the disks that you want to use in the RAID 5 configuration. For example, create volume raid size=6000 disk=1,2,3
creates a RAID 5 set that's 12GB (i.e., 6000MB x 2) across three disks (one-third of the space is used for fault tolerance).
3. ANNOUNCEMENTS
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