Very weird indeed.
Can you even get at the web interface or ping it when you try to boot it up with both drives attached?
What happens when you try to boot with just the HD attached?
You should be able to mount the drive manually anyhow.
Just make sure you’ve got an fstab entry like:
/dev/sdb1 /share/hdd/data ext3 defaults,usrquota 1 1
Where /dev/sdb1 is port 1, /dev/sda1 is port 2 iirc.
The HD should mount alright with:
mount /dev/sdb1if that doesnt work, you can try to check the HD with e2fsck to see wether there is actually a partition and whatnot.
Chances are you got some data loss during one of those cold boots, I guess….