Thanks Darrick, I actually saw that in the source to build 1.02.08 but unfortunately it would be of no help in my situation. You see I work in a storage/array test environment and as for dm, we must specifically work with the builds packaged with the releases of Redhat, Suse, etc. I saw that SLES10 had a build of 1.02.xx but I can also see that it was prior to this new implementation. We are unable to modify (unless required in a customer support scenario) what is packaged with these releases. Thanks again. Regards, Peter -----Original Message----- From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx] On Behalf Of Darrick J. Wong Sent: Tuesday, August 08, 2006 5:09 PM To: device-mapper development Subject: Re: geometry of dm devices...... Peter Koutoupis wrote: >> I understand the HDIO_GETGEO is an unsupported feature to dm >> devices....but under normal practices how would a normal end-user be >> able to obtain such geometry from a raw dm device? I have read of Wow, I'm late to the game. If your kernel/software are new enough, you can set a dm device's geometry via the DM_DEV_SET_GEOMETRY_CMD ioctl. iirc, the userland equivalent is: # dmsetup setgeometry /dev/foo cyl head spt start ...after which HDIO_GETGEO should return nonzero values. You'll need kernel 2.6.16+ and I think the requisite version of dmsetup is 1.02. And to my (very limited) knowledge of multipath, geometry is not set up automatically. --D -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
