Re: [dm-devel] [ANNOUNCE] multipath-tools-0.1.6

[Mike Tran <mhtran@us.ibm.com>]

On Tue, 2004-04-27 at 10:32, Mike Tran wrote:
> On Tue, 2004-04-27 at 05:09, thornber@redhat.com wrote:
> > On Tue, Apr 27, 2004 at 11:57:58AM +0200, christophe.varoqui@free.fr wrote:
> > > Selon thornber@redhat.com:
> > > 
> > > > On Sun, Apr 25, 2004 at 11:54:59PM +0200, christophe varoqui wrote:
> > > > > * add the dmadm WIP tool (read MD superblocks and create
> > > > >   corresponding devmaps when possible)
> > > > 
> > > > :)
> > > > 
> > > Any insight on where to put the log of the mirror target when mapping over a
> > > MD-created raid1 ?
> > 
> > MD effectively uses a log with a single region in it.  So we only need
> > 3 sectors (2 for the header 1 for the bitset) for the log, is there
> > any space in the MD metadata where this could be placed ?
> > 
> > - Joe
> 
> The MD device size is 64K aligned and MD superblock size is 4K.  In term
> of sectors, the calculation is as follows:

Oops.  I was thinking raid1 when saying : "The MD device size is 64K
aligned."  I should have said : "The new MD child size is 64K aligned."

Mike T.