RAID-10 on PE2850

[Karl Peña]

Here is that link to the dell specs that shows a PowerEdge 2850's PERC 4/DC
does not do RAID10, instead it does RAID1-concatenated, like James said:

http://support.dell.com/support/edocs/software/smarrman/marb34/en/ch8_perc.htm?c=us&l=en&cs=04&s=bsd#46459


HTH.
KP


David Hubbard wrote:

>James, are you sure on that?  Not that I have any scientific
>way of telling but the controller calls it stripes and when
>I do sustained writes I always have all four drives lit up.
>If it was concatenated I'd expect just two of the drives to
>have activity during testing with nothing else running?
>
>David 
>
>  
>
>>-----Original Message-----
>>From: James Howard [mailto:jhoward at rackspace.com] 
>>Sent: Thursday, May 04, 2006 1:15 PM
>>To: 'Lutz Birkhahn'; David Hubbard; linux-poweredge at dell.com
>>Subject: RE: RAID-10 on PE2850
>>
>>FYI...that is not really RAID 10, it is actually a concatenated set of
>>mirrors. There is no striping at all.  
>>
>>This was an interesting 'surprise' when going thru the docs 
>>online.  I don't
>>have the link handy, but with a bit of work you can find it, 
>>I think I ended
>>up having to get one of the Open Manage Array Manger docs for 
>>detailed info
>>on the PERC cards.  Seems Dell wants it to be VERY hard to find this
>>information.
>>
>>
>>James Howard
>>Storage Engineer
>>Rackspace Managed Hosting
>>jhoward at rackspace.com
>>
>>    
>>
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