Peter Peltonen wrote:
Hi and thanks for your reply,
On Wed, Mar 9, 2011 at 6:33 PM, m.roth@5-cent.us wrote:
Peter Peltonen wrote:
Based on that info I assume the board having a "8x SAS Ports via LSI 1068E Controller". We received the server with 3 drives + 1 spare as hw RAID-5 preinstalled. During bootup I see that the drives are initialised and everything seems ok.
The issue I am facing is that when trying to install CentOS no hard drives are recognised.
<snip> I recently had a problem like that with a Dell box. The trick is that with a hardware controller, it supercedes software RAID. What you need
to do
is go into the firmware controller configuration on boot, before you
get to
grub, and make sure everything's visible and correct. The controller can see the drives, but not present them to the o/s if you don't.
Hmm, I am not sure if I understand you correctly: are you saying that in the firmware configuration there might be an option that makes the disks invisible for the OS? This sounds a bit strange and I wonder what such config could be...
Or are you suggesting that I should put the controller in "JBOD mode" and then use software RAiD instead of hardware RAID? I would not like to go with this option as I think the performance would suffer this way?
Nope. They may have said they "pre-installed the RAID, but you really need to go into the setup (<ctrl-c>, or -f, or whatever), and see what it presents ->logically<- (key buzzword). If it hasn't been initialized, or put into logical configuration, then it simply will not present the logical drives to the o/s, and AFAIK, it will *not* present the physical drives at all.
mark