Dell poweredge 2600

[jburnley]

Hello,
my dell poweredge cannot see any of the hard drives installed on the server

 

[gtvr]

How are they attached? Do you have a PERC card?

For each controller, when you boot there is an option to go into BIOS of the disk controller - watch your boot process and do that, see if the drives are visible & set up there.