挺有用的，mark一下
http://www.cyberciti.biz/faq/linux-log-all-scsi-events-to-syslog/
How can I log all SCSI events to syslog system under CentOS or Fedora or RHEL or Red hat Linux operating systems?
If you need scsi logging, use /proc/sys/dev/scsi/logging_level kernel variable. Set it as follows:
- -1 - Enable scsi events to syslog.
- 0 - Disable scsi events to syslog.