hard disk device name change after reboot

["hhding.gnu" <hhding.gnu@gmail.com>]

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hi list,

I run Debian 4.1.2-13 on Dell PowerEdge 650 with kernel
2.6.21-2-686. When I install the debian, the device name of partition
is hda1, hda2. After install, I reboot it for times and it works. One
day, I find it fail to reboot, after waiting for root filesystem for a
while, Debian drop to shell(busybox). Then I notice the device name of
hard disk has automaticly changed to hde1,hde2. some times, the
devices name is changed to others like hdg1, hdg2, etc. after reboot.

What's the problem then? Can I fix the device name? Any clue for it
is appreciated. :-)

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