The following syntax is used when running the Verifier utility in a Command Prompt window.

You can type several options on the same single line. For example:

verifier /flags 7 /driver beep.sys flpydisk.sys

Verifier Command-Line Syntax

Windows 2000 Syntax

verifier [ /flags Options [/iolevel Level]] [ /all | /driver DriverList ] 
verifier /volatile /flags VolatileOptions 
verifier /reset 
verifier /query 
verifier /log LogFileName [/interval Seconds] 
verifier /? 

Windows XP Syntax

verifier [ /standard | /flags Options ] [ /all | /driver DriverList ] 
verifier /volatile /flags VolatileOptions 
verifier /volatile {/adddriver | /removedriver} DriverList
verifier /reset 
verifier /querysettings 
verifier /query 
verifier /log LogFileName [/interval Seconds] 
verifier /? 

Windows Server 2003 Syntax

verifier [/disk] [ /standard | /flags Options ] [ /all | /driver DriverList ] 
verifier /volatile /flags VolatileOptions 
verifier /volatile {/adddriver | /removedriver} DriverList
verifier /reset 
verifier /querysettings 
verifier /query 
verifier /log LogFileName [/interval Seconds] 
verifier /? 

Windows Vista Syntax

You can use the /volatile parameter with all Driver Verifier /flags options and with /standard. You cannot use /volatile with /disk. For details, see No Reboot Feature.

verifier [/volatile] [/disk] [/standard | /flags Options ] [ /all | /driver DriverList ]
verifier /volatile /faults [Probability PoolTags Applications DelayMins] /driver DriverList
verifier /volatile {/adddriver | /removedriver} DriverList
verifier /reset 
verifier /querysettings 
verifier /query 
verifier /log LogFileName [/interval Seconds] 
verifier /? 

Syntax

You can use the /volatile parameter with all Driver Verifier /flags options and with /standard. You cannot use /volatile with /disk. For details, see No Reboot Feature.

verifier [/volatile] [/disk] [/standard | /flags Options ] [ /all | /driver DriverList ]
verifier /volatile /faults [Probability PoolTags Applications DelayMins] /driver DriverList
verifier /volatile {/adddriver | /removedriver} DriverList
verifier /reset 
verifier /querysettings 
verifier /query 
verifier /log LogFileName [/interval Seconds] 
verifier /? 

Parameters

/flags Options

Activates the specified options after the next reboot. In Windows 2000, this number must be entered in decimal format. In Windows XP and later, this number can be entered in decimal or in hexadecimal (with an 0x prefix) format. Any combination of the following values is allowed.

Decimal	Hexadecimal	Standard Setting	Option
1	0x1 (Bit 0)	X	Special Pool
2	0x2 (Bit 1)	X	Force IRQL Checking
4	0x4 (Bit 2)		Low Resources Simulation
8	0x8 (Bit 3)	X	Pool Tracking
16	0x10 (Bit 4)	X	I/O Verification
32	0x20 (Bit 5)	X	Deadlock Detection  (Windows XP and later)
64	0x40 (Bit 6)		Enhanced I/O Verification  (Windows XP and later) (In Windows 7 and later, this option is automatically activated when you select I/O Verification)
128	0x80 (Bit 7)	X	DMA Verification  (Windows XP and later)
256	0x100 (Bit 8)	X	Security Checks  (Windows XP and later)
512	0x200 (Bit 9)		Force Pending I/O Requests (Windows Vista and later)
1024	0x400 (Bit 10)		IRP Logging  (Windows Server 2003 and later)
2048	0x800 (Bit 11)	X	Miscellaneous Checks (Windows Vista and later)

You cannot use this method to activate the SCSI Verification option. For information, see SCSI Verification.

/standard

(Windows XP and later)  Activates the "standard" Driver Verifier options after the next boot. The standard options in Windows XP are Special Pool, Force IRQL Checking, Pool Tracking, I/O Verification, Deadlock Detection, and DMA Verification. This is equivalent to /flags 0xBB. Starting with Windows Vista, the standard options also include Security Checks and Miscellaneous Checks. This is equivalent to /flags 0x9BB.

/iolevel Level

(Windows 2000 only)  Specifies the level of I/O Verification.

The value of Level can be 1 or 2. The default value is 1.

Level value	Description
1	Enables Level 1 I/O Verification (default)
2	Enables Level 1 I/O Verification and Level 2 I/O Verification

If I/O Verification is not enabled (by using /flags 0x10), /iolevel is ignored.

/disk

(Windows Server 2003 and later)  Activates the Disk Integrity Checking option after the next boot. You cannot use /disk with /volatile on any version of Windows.

/all

Directs Driver Verifier to verify all installed drivers after the next boot.

/driver DriverList

Direct Driver Verifier to verify the specified drivers.

DriverList is a list of drivers by binary name, such as Driver.sys. Use a space to separate each driver name. Wildcard values, such as n*.sys, are not supported.

/volatile

Changes the settings without rebooting the computer. Volatile settings take effect immediately.

On Windows Vista and later versions of Windows, you can use the /volatile parameter with the /flags parameter to enable and disable any option without rebooting. You can also use /volatile with the /adddriver and /removedriver parameters to start or stop the verification of a driver without rebooting, even if Driver Verifier is not already running.

On versions of Windows prior to Windows Vista, the /volatile parameter can be used only with the options listed in VolatileOptions and it can be used to start or stop the verification of a driver without rebooting only if Driver Verifier is already running and the computer has been rebooted.

For details, see Using Volatile Settings and No Reboot Feature.

/flags VolatileOptions

Specifies the Driver Verifier options that are changed immediately without rebooting in Windows 2000, Windows XP, and Windows Server 2003. (In Windows Vista, you can use the /volatile parameter with all /flags values.)

In Windows 2000, enter a number in decimal format. In Windows XP and Windows 2003, enter a number in decimal or in hexadecimal format (with an 0x prefix).

Any combination of the following values is permitted.

Decimal	Hexadecimal	Option
1	0x1 (Bit 0)	Special Pool
2	0x2 (Bit 1)	Force IRQL Checking
4	0x4 (Bit 2)	Low Resources Simulation

/adddriver VolatileDriverList

(Windows XP and later)  Adds the specified drivers to the volatile settings. To specify multiple drivers, list their names, separated by spaces. Wildcard values, such as n*.sys, are not supported. See Using Volatile Settings for details.

/removedriver VolatileDriverList

(Windows XP and later)  Removes the specified drivers from the volatile settings. To specify multiple drivers, list their names, separated by spaces. Wildcard values, such as n*.sys, are not supported. See Using Volatile Settings for details.

/faults

(Windows Vista and later)  Enables the Low Resources Simulation feature in Driver Verifier. You can use /faults in place of /flags 0x4. However, you cannot use /flags 0x4 with the /faults subparameters.

You can use the following subparameters of the /faults parameter to configure Low Resources Simulation.

Subparameter	Description
Probability	Specifies the probability that Driver Verifier will fail a given allocation. Type a number (in decimal or hexadecimal) to represent the number of chances in 10,000 that Driver Verifier will fail the allocation. The default value, 600, means 600/10000 or 6%.
Pool Tags	Limits the allocations that Driver Verifier can fail to allocations with the specified pool tags. You can use a wildcard character (*) to represent multiple pool tags. To list multiple pool tags, separate the tags with spaces. By default, all allocations can fail.
Applications	Limits the allocations that Driver Verifier can fail to allocations for the specified program. Type the name of an executable file. To list programs, separate the program names with spaces. By default, all allocations can fail.
DelayMins	Specifies the number of minutes after booting during which Driver Verifier does not intentionally fail any allocations. This delay allows the drivers to load and the system to stabilize before the test begins. Type a number (in decimal or hexadecimal). The default value is 7 (minutes).

/reset

Clears all Driver Verifier settings. After the next boot, no drivers will be verified.

/querysettings

(Windows XP and later) Displays a summary of the options that will be activated and drivers that will be verified after the next boot. The display does not include drivers and options added by using the /volatile parameter. For other ways to view these settings, see Viewing Driver Verifier Settings.

/query

Displays a summary of Driver Verifier's current activity. The Level field in the display is the hexadecimal value of options set with the /volatile parameter. See Monitoring Global Counters and Monitoring Individual Counters for explanations of each statistic.

/log LogFileName

Creates a log file with name LogFileName. Driver Verifier periodically writes statistics to this file. For details, see Creating Log Files.

If a verifier /log command is typed at the command line, the command prompt does not return. To close the log file and return a prompt, use the CTRL+C key. After a reboot, to create a log, you must submit the verifier /log command again.

/interval Seconds

Specifies the interval between log file updates. The default is 30 seconds.

/?

Displays command-line help.

For more information about the use of these commands, see Controlling Driver Verifier and Monitoring Driver Verifier.