Re: [Xen-API] XCP + RAID

[Scott Zupek <scottz@xxxxxxxxx>]

Sorry for the reply and not changing the topic, that was sucky of me.  
My apologies please.
So if software raid, wont hinder performance and since I already have 
these 4 drives to run Raid, could I boot into Debian Live and run the 
software raid and install Xen Hypervisor on that?  True I don't get the 
added benefits of the DOM0 w/ XCP, but it's still (once fully 
configured) a stand alone server that I don't have to worry much about.
Unforunately, I thought it was read Raid like the nForce controller, but 
apparently AMD got me on this one. I just bought the Motherboard and CPU 
(8 core, but it looks like the DOM0 only detects 5 threads, so maybe I 
am better off with the 6 core one I have).
So to run Xen Hypervisor + XCP(??) to manage, would I still get the same 
results as running the ISO hypervisor version? (maybe not AS fast)?
Thank you for your time. Should I be using a different thread / mailing 
list for this question?
Scott




On 12/21/11 3:17 PM, George Shuklin wrote:
> On 22.12.2011 00:45, Scott Zupek wrote:
> > I am re-installing XCP 1.1 via ISO and it looks like it can't find 
> > the raid controller driver because it's listing all the drives 
> > individually.
> > Since I am not very familiar with the Linux side of Raid, do I need 
> > to download the Linux driver (if there is even one available) and put 
> > it on a floppy like Windows?
> > Motherboard = ASUS M5A97EVO
> > RAID Controller AMD SB950 chipset
> >
> > Raid type = 1+0 *aka raid 10
> First, please, never reply to maillist with new topic, you causing 
> wrong thread ordering of messages. If you wish to start new topic, 
> just write it to maillist address.
> Second, there is two issues:
>
> 1) Don't use fake raid under linux. Linux has perfect software raid, 
> which much more reliable and much less troublemaking, compare to fake 
> raid (you device is fake raid, because it don't actually do anything 
> with drives).
> 2) Sad to say, but XCP have very serious issues with raid support. We 
> using software raid with XCP in our company, but we created very 
> specifically crafted ISO image with lots ad-hoc fixes and hacks. I 
> can't recommend do this to anyone, who don't really deep enough in XCP 
> to do this by himself.
> So, you have to opportunities:
> a) use real hardware raid (to get raid array as  /dev/sda).
> b) Do not use raid in anyway (configure fake raid to HBA mode) - use 
> external storage and don't bother for XCP system drive. If host die, 
> no data will be lost.
>
>
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