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select
Shifts the focus to a disk, partition, volume, or virtual hard disk (VHD).
set id
Changes the partition type field for the partition with focus.
shrink
Reduces the size of the selected volume by the amount you specify.
uniqueid
Displays or sets the GUID partition table (GPT) identifier or master boot record (MBR) signature for the disk with focus.
Listing available objects
You can view a list of options associated to each command by running the main command followed by what is available to that specific command. Running list by itself will display the four parameters below:
Note
After you run the list command, an asterisk (*) appears next to the object of focus.
Examples
To see available disk(s), run list disk:
list disk
To select a disk, run select disk followed by the disk number. For example:
select disk 1
Before disk 1 can be utilized, a partition will need to be created by running create partition primary:
create partition primary
Lastly, we can perform a quick format of disk 1 to NTFS with the label "Backup" by running format fs=ntfs label=Backup quick as seen below:
format fs=ntfs label=Backup quick
diskperf
The diskperf command remotely enables or disables physical or logical disk performance counters on computers running Windows.
Syntax
diskperf [-y[d|v] | -n[d|v]] [\\computername]
Options
Option
Description
-y
Starts all disk performance counters when the computer restarts.
-yd
Enables disk performance counters for physical drives when the computer restarts.
-yv
Enables disk performance counters for logical drives or storage volumes when the computer restarts.
-n
Disables all disk performance counters when the computer restarts.
-nd
Disable disk performance counters for physical drives when the computer restarts.
-nv
Disable disk performance counters for logical drives or storage volumes when the computer restarts.
\\<computername>
Specifies the name of the computer where you want to enable or disable disk performance counters.
-?
Displays context sensitive help.
\\<computername>
Diskraid
Diskraid is a command-line tool that enables you to configure and manage redundant array of independent (or inexpensive) disks (RAID) storage subsystems.
RAID is typically used on servers to standardize and categorize fault-tolerant disk systems. RAID levels provide various mixes of performance, reliability, and cost. Some servers provide three of the RAID levels: Level 0 (striping), Level 1 (mirroring), and Level 5 (striping with parity).
A hardware RAID subsystem distinguishes physically addressable storage units from one another by using a Logical Unit Number (LUN). A LUN object must have at least one plex, and can have any number of additional plexes. Each plex contains a copy of the data on the LUN object. Plexes can be added to and removed from a LUN object.
Most Diskraid commands operate on a specific host bus adapter (HBA) port, initiator adapter, initiator portal, provider, subsystem, controller, port, drive, LUN, target portal, target, or target portal group. You use the SELECT command to select an object. The selected object is said to have focus. Focus simplifies common configuration tasks, such as creating multiple LUNs within the same subsystem.
Note
The Diskraid command-line tool works only with storage subsystems that support Virtual Disk Service (VDS).
Diskraid commands
The following commands are available from within the Diskraid tool.
add
Adds an existing LUN to the currently selected LUN, or adds an iSCSI target portal to the currently selected iSCSI target portal group.
Syntax
add plex lun=n [noerr]
add tpgroup tportal=n [noerr]
Parameters
Parameter
Description