Escalated to Bugzilla from IssueTracker
Please test the kernel located at: http://people.redhat.com/coughlan/.2.4.21-37.7.ELdrvrtest2/ to verify that it solves the problem. This contains version 1.1.5-2412 of the aacraid driver. This is the latest from Adaptec, and is a candidate for U7.
A fix for this problem has just been committed to the RHEL3 U7 patch pool this evening (in kernel version 2.4.21-37.10.EL).
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2006-0144.html