Re: Proposed enhancements to MD

Jakob Oestergaard
2004-01-14T19:07:06Z

On Tue, Jan 13, 2004 at 12:10:58PM -0800, Mike Fedyk wrote:
> On Tue, Jan 13, 2004 at 05:26:36PM +0100, Jakob Oestergaard wrote:
> > The RAID conversion/resize code for userspace exists already, and it
>
> That's news to me!
>
> Where is the project that does this?

http://unthought.net/raidreconf/index.shtml

I know of one bug in it which will thoroughly smash user data beyond
recognition - it happens when you resize RAID-5 arrays on disks that are
not of equal size. Should be easy to fix, if one tried :)

If you want it in the kernel doing hot-resizing, you probably want to
add some sort of 'progress log' so that one can resume the
reconfiguration after a reboot - that should be doable, just isn't done
yet.

Right now it's entirely a user-space tool and it is not integrated with
the MD code to make it do hot-reconfiguration - integrating it with DM
and MD would make it truely useful.

/ jakob