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Re: [PLUG] CentOS 5 on>2TB disks
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FYI,
Many manufactures are now putting VMware ESXi ( embeded version ) on a
1GB USB
thumb drive (internal) [1] to an OEM purchased servers instead of the
traditional RAID1
2 disk array. VMware recommends not using internal disks for ESXi ! -
boot either
from USB or SAN.
Lee
[1] VMware Introduction to ESXi, Lee Marzke ( VMware users conference
20 Sep, 2010 )
http://plone.4aero.com/Members/lmarzke/vmug_esxi/embedded_text.png/image_preview
On 10/09/2010 01:55 AM, JP Vossen wrote:
> Date: Fri, 08 Oct 2010 07:12:57 -0400
> From: Carl Johnson
>
> Why not stick /boot on a usb drive? Sounded plausible to me.
Because they are going into customer's data centers... :-) And
there's lots and lots of them.
Date: Fri, 8 Oct 2010 07:13:32 -0400
From: Doug Stewart
Why not map an LVM on top for everything with a single non-LVM
partition cut for /boot at ~100MB?
Because it's hardware RAID, so the physical device itself is >2TB,
thus forcing GPT instead of MBR.
Date: Fri, 8 Oct 2010 08:34:12 -0400
From: Gordon Dexter
Have you considered making a hybrid MBR? This means you have both a
GPT and
an MBR partition table. The GPT is in a different location so tools
designed for MBR don't interfere with it. Normally when you have a
GPT the
MBR is initialized to contain one partition, spanning the entire
disk, of
type 0xEE (GPT). But there are tools designed to copy the layouts of
the
first four partitions from the GPT to the MBR so that older tools can
still
work. I'm not sure what effect this has on how the kernel reads the
partition table on >2TB disks, but it's worth looking into.
Now that's a new one on me. It looks like I'd have to either use a
patched grub or grub2 anyway though. If I could find a grub2 for
CentOS 5.5 (both 32 and 64 bit) that I liked, I *think* everything
else will work. Nice writeup at:
http://www.rodsbooks.com/gdisk/hybrid.html
But I don't see Grub2 for RHEL5 in EPEL (think "Universe" for RHEL,
http://fedoraproject.org/wiki/EPEL) and only for Fedora 10+ on pbone.
One of the Fedora ones would *probably* work, but...
I am going to have to tackle this in the next 3-4 months, so I'll do a
follow-up when I finally figure it out.
Thanks for thinking about it and for the feedback,
JP
----------------------------|:::======|-------------------------------
JP Vossen, CISSP |:::======| http://bashcookbook.com/
My Account, My Opinions |=========| http://www.jpsdomain.org/
----------------------------|=========|-------------------------------
"Microsoft Tax" = the additional hardware & yearly fees for the add-on
software required to protect Windows from its own poorly designed and
implemented self, while the overhead incidentally flattens Moore's Law.
___________________________________________________________________________
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