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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Slightly OT: 10g shared raw volumes: Is there a "best" partition type in Linux for raw partitions used for CRS objects

Re: Slightly OT: 10g shared raw volumes: Is there a "best" partition type in Linux for raw partitions used for CRS objects

From: Matthew Zito <mzito_at_gridapp.com>
Date: Mon, 12 Jul 2004 14:32:28 -0400
Message-Id: <D441999E-D431-11D8-BE55-000393D3B578@gridapp.com>

I'm not really sure there IS a good partition type that will absolutely make sure some overeager sysadmin doesn't destroy it. You're safe with a type 83 from a mounting standpoint, as mount will look for a valid type superblock and not finding one, cheerfully tell the sysadmin where he can stick his superblock.

Swap seems like not as good of an idea, since a sysadmin might think "ah, we need more swap" and run mkswap against it.

The best way, I think, would be to replace mkfs or mkswap with a shell script "echo "Do not run mkfs/mkswap against partitions /dev/blah and /dev/blah2! If this is not what you were going to mkfs, run mkfs.real"

If they still whack it then, death's too good for them.

Thanks,
Matt

--
Matthew Zito
GridApp Systems
Email: mzito_at_gridapp.com
Cell: 646-220-3551
Phone: 212-358-8211 x 359
http://www.gridapp.com


On Jul 11, 2004, at 3:28 PM, Mark W. Farnham wrote:


> So assume for a moment there is no alternative for the CRS disk and
> voting
> disk other than /sbin/fdisk configured raw on a certain Linux
> combination.
>
> I've gotten a suggestion that type "swap" (carefully *NOT* really
> configured
> as used swap at startup) would be a good choice, since any inadvertant
> attempt to mount the device will be met with a polite slap in the face
> instead of possibly mounting the raw acreage and having bad things take
> place on the CRS space.
>
> Any comments?
>
> I'm guessing that the type really won't affect i/o performance at all,
> since
> it will be used direct, being raw.
>
> mwf
>
>
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Received on Mon Jul 12 2004 - 13:27:44 CDT

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