Re: Raw device or Block device?

From: Mark J. Bobak <>
Date: Wed, 7 Jan 2015 13:12:03 -0500
Message-ID: <>

Hi Michael,

Your best argument is that raw devices are deprecated since Linux kernel 2.6.

See here:

Note, in particular, the first line of section 4.14.1: "With the Linux 2.6 kernel, support for raw devices is deprecated."

That should provide you all the ammunition you need.

Hope that helps,


On Wed, Jan 7, 2015 at 12:38 PM, Michael Cunningham <> wrote:

> Hello List, Happy New Year.
> In regards to raw devices or block level devices we are having a debate
> with the storage team and I don't know the answer so here it goes.
> The question is can you think of any benefits to using block level devices
> vs. raw devices? If there is performance improvement please help me in how
> to prove it.
> Another reason I want block devices is so I can get the server to
> automatically recover if there is a crash. Right now the storage admins
> must be available to remount all the raw devices. That means that Oracle
> HAS doesn't matter because there is no storage for ASM. That's one
> motivation.
> --
> Michael Cunningham

Received on Wed Jan 07 2015 - 19:12:03 CET

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