Mylex RAID Controller error

[Gian Luca Decurtins]

Hello out there

I've got an Alpha Server 800 running FreeBSD 4.9. The Box runs very 
stable but there are each day many warnings like this:

berserker% dmesg
mlx0: I/O error - attempt to write beyond end of drive
swap_pager: I/O error - pageout failed; blkno 54992,size 131072, error 5
mlx0: I/O error - attempt to write beyond end of drive
swap_pager: I/O error - pageout failed; blkno 56832,size 131072, error 5
mlx0: I/O error - attempt to write beyond end of drive
swap_pager: I/O error - pageout failed; blkno 67776,size 131072, error 5
[snip]

The mlx0 is a Mylex DAC 960P Raid Controller with the newest Firmware.

Any idea to solve this?

-Luca Decurtins.