Re: Debian on PE M600
When you say that the message appears from time to time, are you saying that it periodically changes from /dev/sda to /dev/sdb and back again?
I saw this problem when I installed using a virtual CDROM on a PE2950. The device names changed temporarily to reflect the extra virtual disk. After I changed my grub once, I haven't seen it again. Sometimes plugging in extra devices (usb drives for example) can mess with the device ordering.