Hi I have absolutely no idea what does it means : --------------------- Kernel Begin ------------------------ WARNING: Kernel Errors Present Buffer I/O error on device sr0, l ...: 16932 Time(s) end_request: I/O error, dev sr0, sector ...: 16962 Time(s) ---------------------- Kernel End ------------------------- I am getting this all the time a lot of times as you can see. Machine is running on Centos 5.1 x64 running vmware server , with 2 serial ata devices sda sdb connected into raid md0 md1 level 1. I have no device sr0 and I do not know what it is. I have DVDRW on /dev/hda I believe it all started once when I used cdrecord to burn image on cd and I've got error messages that device is not ready. Since I was not able to kill cdrecord propertly I did restarted system. Since then I am allways receiving this messages. Thanks a lot David -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20080229/88f02feb/attachment.html>