I saw this email
below and was wondering if this is supported in both dm and the LVM2 tools now.
I am trying to setup a bootable cd, that can be written to during that session
and this would be a god send, since as the last person points out there really
isn't a mature way to do this in the 2.4/2.5 kernels. 2.6 is suppose to have a
unionfs sometime after release, but this is an immediate
project.
Thanks,
Sean
------------------------------------------------------------------------
Sean P. Kane spkane@genomatica.com
Lead Infrastructure Architect Genomatica, Inc.
------------------------------------------------------------------------
"When we destroy something man has created we call it vandalism......
When we destroy something that Gaia has created we call it progress."
Sean P. Kane spkane@genomatica.com
Lead Infrastructure Architect Genomatica, Inc.
------------------------------------------------------------------------
"When we destroy something man has created we call it vandalism......
When we destroy something that Gaia has created we call it progress."
read-only media in a LVM?
Joe Thornber linux-lvm@sistina.com
Tue May 28 03:44:01 2002
Tue May 28 03:44:01 2002
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On Mon, May 27, 2002 at 04:37:49PM -0700, Ami Fischman
wrote:
> Hi there,
> I am wondering
whether it is possible to have a read-only fs (CDROM, image,
> etc) as part of an
LVM-managed volume. I see references to COW
> (copy-on-write, I'm
hoping :)) in the kernel drivers/md/ files, but it's not
> at all clear to me
whether or not the current drivers can be used to
> implement a
"translucent" or "inheriting" file system (one where a base fs
> is given, on r-o
media, and changes to it get recorded on another device,
> presumabely a r-w
fs). Please let me know whether this is currently
> possible, being
planned for the future, or if I'm making no sense above &
> you want me to
clarify :). For a not-quite-mature example of what I'm
> talking about, see
translucency.sf.net.
In fact you can do this now if you use just
device-mapper/dmsetup :)
It's just the LVM2 tools that don't support it yet.- Joe
