Product guide

A
Frequently asked questions
Here are answers to frequently asked questions.
What are the file types that I should exclude from on-access scanning?
Exclude these common file types from on-access scanning. Add other files in the exclusion list
according to your environment.
Database files
• .ldb • .pst.tmp
• .mdb • .nsf
• .pst
Archives or large files
• .7z • .tar
• .cab • .tgz
• .iso • .vhd
• .jar • .vmdk
• .rar • .zip
Why is not VirusScan Enterprise for Storage designed to perform on-access scan for
database, large, or archived files?
When a system sends a scan file request to the filer, the filer has only 45 seconds of Common
Internet File System (CIFS) or Server Message Block (SMB) protocol timeout. This scanning
operation must be completed before this duration, otherwise the user is denied access to the
file.
There are three performance parameters for an on-access scan solution. Do not use the
time-sensitive on-access scanning solution, for:
• Files that are already scanned by another product — Email local databases
(Example: .pst, .nsf) and email server or SQL Server databases (Example: .mdb, .mdf) use
large database files. These files should be scanned by email or database scanning software.
McAfee recommends that you configure specialized scanners to scan the database contents
upon creation.
• Archived files — Scanning archived files such as .zip, .rar, or .7z requires the scan engine
to expand the archive folder and its contents before initiating the scanning.
McAfee recommends that you configure on-access scanning to scan the archive content when
it is expanded by the user, or schedule an on-demand scan to scan these files.
McAfee VirusScan Enterprise for Storage 1.1.0 Product Guide
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