Cisco Cisco Web Security Appliance S380 릴리즈 노트

 lists the known issues in this release of AsyncOS for Web.

78754

When the RAID on the S170 appliances change state in some cases, the appliance 
sends an alert message with the following message:

A RAID-event has occurred:

RAID states changed from “OPTIMAL” to “SUBOPTIMAL”

or

A RAID-event has occurred:

RAID states changed from “SUBOPTIMAL” to “OPTIMAL”

The change in state is usually the result of the appliance powering off without being 
shut down from the web interface or CLI.

Workaround: This change in state is benign. You can ignore these alert messages. 

78517

Some FTP clients may time out and close the connection with the FTP Proxy early 
when uploading very large files and IronPort Data Security Policies are enabled. This 
results when the FTP Proxy requires more time to upload the file to the FTP server 
and the connection between the FTP client and the FTP Proxy has been idle for more 
than the configured time on the FTP client. Note that the FTP Proxy correctly uploads 
the file to the FTP server even if the FTP client closes its connection with the FTP 
Proxy.

Workaround: Increase the appropriate idle timeout value on the FTP client.