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how to switch "Direct disk access" on in CLS?


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Product: Command Line Scanner version, obtained by online update of EEK version

Operating System: Windows 7 Home Premium, 64 bit, SP1

Other Security: AVG Anti-Virus Free Edition 2013, Windows Firewall, KeyScrambler plugin for Firefox version

I see "Direct disk access" listed with 5 other scan settings when running the Command Line Scanner.

It seems to be missing from the online documentation and the help screen, even though it is praised in a recent knowledge base article.

What is the switch to turn it on?



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Dear Jim,

to turn on the Direct disk access please use the flag /dda in the scan command.

To get all possible flags and the commandline scanner help use the command

a2cmd /help

and you will get all needed informations....

Emsisoft Commandline Scanner v.

© 2003-2012 Emsisoft - www.emsisoft.com

a2cmd.exe [path] | [parameters]

Scan parameters (can be used together):

/f=[], /files=[path] Scan files. Full path to file or folder required

/quick Scans all active programs, Spyware Traces and


/smart Good and fast result, but only important folders will

be scanned

/deep Slowest scan. All files on all hard disks will be

scanned deeply

/rk, /rootkits Scan for active Rootkits

/m, /memory Scan Memory for active Malware

/t, /traces Scan for Spyware Traces

/c, /cookies Scan for Tracking Cookies

/fh=[handle] /pid=[PID] Scan file by handle. Process ID of the

handle is required

/b=[pointer] /bs= /pid=[PID] Scan buffer. Buffer size and process ID

are required

Scan settings parameters (used with scan parameters):

/r, /riskware Alert Riskware that is often used by Malware

/a, /archive Scan in compressed archives (zip, rar, cab)

/n, /ntfs Scan in NTFS Alternate Data Streams

/ac, /advancedcaching Use advanced caching

/dda, /directdiskaccess Use direct disk access

/l=[], /log=[filepath] Save a logfile in UNICODE format

/la=[], /logansi=[filepath] Save a logfile in ANSI format

/x=[], /ext=

  • Scan only specified file extensions, comma


/xe=[], /extexclude=

  • Scan all except the specified file extensions

/wl=[], /whitelist=[file] Load whitelist items from the file

/d, /delete Delete found objects including references

/dq, /deletequick Delete found objects quickly

/q=[], /quarantine=[folder] Put found Malware into Quarantine

Malware handling parameters (standalone parameters):

/ql, /quarantinelist List all quarantined items

/qr=[], /quarantinerestore=[n] Restore the item number n of the quarantine

/qd=[], /quarantinedelete=[n] Delete the item number n of the quarantine

Update settings parameters:

/u, /update Update Malware signatures

/ub, /updatebeta Update Malware signatures (beta)

/proxy=[proxyname:port] Proxy address and port number

/proxyuser=[username] Proxy user name

/proxypassword=[password] Proxy user password

General parameters:

/?, /help Show help message

If you have any more questions or problems, just let me know.

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Dear Christian,

Thank-you for keeping me informed. I read the new documentation but I am still puzzled by the /f parameter.

Here is the pertinent documentation:

/f=[path], /files=[path]

Scans a disk, a folder or a single file for malware infections. Folder paths with spaces have to be put in quotation marks. Only one path can be specified.

Example: a2cmd /f="c:\windows\"

Please review this thread, where I have posted evidence that seems to prove that multiple paths can be specified and scanned using the /f parameter.

What is the explanation for the results shown in the quoted logfile? (reproduced below, my comments in red)

I find it hard to believe that only one path can be specified with the /f parameter. Previous versions ( allowed multiple paths. Allowing only one path reduces the power and versatility of the Command Line Scanner.

Thanks for your help,


Emsisoft Commandline Scanner - Version 3.0

Last update: 11/11/2012 06:10:13

Scan settings:

Scan type: Custom Scan

Objects: F:\eicar (1).com, F:\eicar (2).com, F:\eicar (3).com Each of the 3 files specified using /f are considered an object

Detect Riskware: Off

Scan archives: Off

ADS Scan: Off

File extensions: Off

Advanced caching: Off

Direct disk access: Off

Scan start: 11/11/2012 15:32:36

F:\eicar (1).com detected: EICAR-Test-File (not a virus) (B) Here are the scan results, listing 3 infected files

F:\eicar (2).com detected: EICAR-Test-File (not a virus) (B)

F:\eicar (3).com detected: EICAR-Test-File (not a virus) (B)

Scanned 1 Here is the total number of files scanned. How can this be less than the number of infected files that were found?

Found 3

Scan end: 11/11/2012 15:32:40

Scan time: 0:00:03

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