[CentOS] Re: 6TB SCSI RAID vs. Centos

Joshua Baker-LePain jlb17 at duke.edu
Fri Jul 25 21:43:50 UTC 2008

On Fri, 25 Jul 2008 at 2:17pm, Scott Silva wrote

> on 7-25-2008 6:26 AM Marcelo Roccasalva spake the following:

>> You can't install centos (or redhat) over a gpt partition (unless
>> itanium platform) and there is a big chance your bios won't boot such
>> installation. I came with 2 solutions: if disk access performance
>> isn't important (as for backup), I do software raid; or I install two
>> little raid1 disks for the OS and then I use GPT or LVM on the
>> multi-tera raid of big disks.
> Or partition the array with a small partition for OS and big partition (gpt) 
> for data. You should be able to carve up the array that way.

I think you're mixing your terminology there.  gpt isn't a partition type, 
it's a disklabel.  There's only one per disk (obviously), no matter how 
many partitions are on the disk.

What some array controllers can do is carve a single array into multiple 
volumes (usually each presented on their own LUN).  Then you could carve 
the one array into a small boot volume (with an msdos disklabel and 
multiple partitions) on one LUN and the rest in a large data bolume (with 
a gpt disklabel) on the other LUN.

Joshua Baker-LePain
QB3 Shared Cluster Sysadmin

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