Speed of antivirus full disk scans

Speed of antivirus full disk scans
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Subject Author Date
Speed of antivirus full disk scans Darrel 10-15-2006
Posted by Darrel on October 15, 2006, 5:06 pm
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Can anyone tell me how the speed of a full disk scan is affected by the
ratio of shortcuts to files? Suppose we take NAV scanning a disk with
50,000 jpgs. Now we replace them with 50,000 shortcuts. Any difference
in scan time expected? How about MS doc files vs shortcuts?


Posted by David H. Lipman on October 15, 2006, 5:15 pm
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| Can anyone tell me how the speed of a full disk scan is affected by the
| ratio of shortcuts to files? Suppose we take NAV scanning a disk with
| 50,000 jpgs. Now we replace them with 50,000 shortcuts. Any difference
| in scan time expected? How about MS doc files vs shortcuts?

ShortCuts are small files and are not really binary files. They are only
pointers to
programs, data files, URLs and some embedded objects. Usually they under 2KB.
They are
totally unlike JPEGS, DOC, PPT and other data files that can be any size. You
just can't
compare them. All you can say is you can scan ShortCuts (.LNK, .URL, etc.)
much faster
because of their limited size.

Whay are you asking ?

--
Dave
http://www.claymania.com/removal-trojan-adware.html
http://www.ik-cs.com/got-a-virus.htm



Posted by Darrel on October 16, 2006, 1:55 am
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Machine has about 100s of 1000s data files. One option is to move most
files to an external USB disk and store their shortcuts on the main
disk. Once the files on the external are known to be OK, unplug the
external during full disk scan.

David H. Lipman wrote:
>
> | Can anyone tell me how the speed of a full disk scan is affected by the
> | ratio of shortcuts to files? Suppose we take NAV scanning a disk with
> | 50,000 jpgs. Now we replace them with 50,000 shortcuts. Any difference
> | in scan time expected? How about MS doc files vs shortcuts?
>
> ShortCuts are small files and are not really binary files. They are only
pointers to
> programs, data files, URLs and some embedded objects. Usually they under 2KB.
They are
> totally unlike JPEGS, DOC, PPT and other data files that can be any size. You
just can't
> compare them. All you can say is you can scan ShortCuts (.LNK, .URL, etc.)
much faster
> because of their limited size.
>
> Whay are you asking ?
>
> --
> Dave
> http://www.claymania.com/removal-trojan-adware.html
> http://www.ik-cs.com/got-a-virus.htm


Posted by David H. Lipman on October 16, 2006, 10:52 am
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| Machine has about 100s of 1000s data files. One option is to move most
| files to an external USB disk and store their shortcuts on the main
| disk. Once the files on the external are known to be OK, unplug the
| external during full disk scan.
|

That will be fool hardy. You STILL need to make sure the data files are
scanned. Scanning
shortcuts is a waste of time and bears no benefit.

Once the data is known to be free of malware (assuming they are ALL data files
only) you
don't have to do "On Demand" scans on the drive of data. However, you still
should be doing
"On Access" scanning such that they individual files being edited, viewed or
modified are
scanned as they are written or opened.

--
Dave
http://www.claymania.com/removal-trojan-adware.html
http://www.ik-cs.com/got-a-virus.htm



Posted by Darrel on October 16, 2006, 11:18 am
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The files are scanned before archiving. The shortcuts tell me where to
find them and because the shortcuts are small the full disk scan will
be quicker. They simply get scanned because they are there.

NAV pops up once a week to do a full disk scan and then keeps nagging
me to complete the scan. I like the reminder to scan, but not the
nagging, so I am looking for a quick way to complete the full disk
scan. I prefer an automatic process to having to remember to scan and
having to select and issue commands.

David H. Lipman wrote:
>
> | Machine has about 100s of 1000s data files. One option is to move most
> | files to an external USB disk and store their shortcuts on the main
> | disk. Once the files on the external are known to be OK, unplug the
> | external during full disk scan.
> |
>
> That will be fool hardy. You STILL need to make sure the data files are
scanned. Scanning
> shortcuts is a waste of time and bears no benefit.
>
> Once the data is known to be free of malware (assuming they are ALL data files
only) you
> don't have to do "On Demand" scans on the drive of data. However, you still
should be doing
> "On Access" scanning such that they individual files being edited, viewed or
modified are
> scanned as they are written or opened.
>
> --
> Dave
> http://www.claymania.com/removal-trojan-adware.html
> http://www.ik-cs.com/got-a-virus.htm


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