On Thu, Jan 22, 2015 at 1:44 AM, Tim Bell <[email protected]> wrote: >> -----Original Message----- >> From: Victor Lowther [mailto:[email protected]] >> Sent: 21 January 2015 21:06 >> To: OpenStack Development Mailing List (not for usage questions) >> Subject: Re: [openstack-dev] [Ironic] RAID interface - backing disk hints >> >> On Tue, Jan 20, 2015 at 8:36 AM, Jim Rollenhagen <[email protected]> >> wrote: >> > On Tue, Jan 20, 2015 at 07:28:46PM +0530, Ramakrishnan G wrote: > ... >> >> Given that, deciding to build and manage arrays based on drive >> mfgr/model/firmware is a lot less useful than deciding to build and manage >> them based on interface type/media type/size/spindle speed/slot#. >> > > +1 - How about using the /dev/disk/by-path information which says to install > the system onto the disks by their device location. > > Have a look at how kickstart does it. It's the same problem so we don't need > to re-invent the wheel.
I am aware of how kickstart detects disks and how we can pass information about which disk to install on, and that is only tangentially related to what I am talking about. What I have been talking about is how to decide which physical disks attached to a hardware RAID controller should be used to create a RAID volume, and the relative usefulness of the properties of the physical disks in doing so. My contention is that drive mfgr/model/firmware is not used in practice to make that decision -- other factors, such as disk size, spindle speed, media type, and interface type are what are used in a production setting. > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: [email protected]?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
