Feature changed by: Per Jessen (pjessen) Feature #306188, revision 13 Title: Request for RAID metadata version specification option in Partitioner's install interface openSUSE-11.2: Rejected by Andreas Jaeger (a_jaeger) reject date: 2009-08-12 10:15:21 reject reason: No answer in time. Priority Requester: Desirable + openSUSE-11.4: Unconfirmed + Priority + Requester: Desirable Requested by: Unknown Nil (unknown) Product Manager: (Novell) Project Manager: (Novell) Developer: (Novell) Partner organization: openSUSE.org Description: Allow setting of software raid superblock version in YaST. Relations: - use new RAID SBs (novell/bugzilla/id: 282807) https://bugzilla.novell.com/show_bug.cgi?id=282807 - lilo reports inconsistent raid version when trying to install on raid1 (novell/bugzilla/id: 357897) https://bugzilla.novell.com/show_bug.cgi?id=357897 - request for RAID metadata version specification option in Partitioner's install interface (novell/bugzilla/id: 483973) https://bugzilla.novell.com/show_bug.cgi?id=483973 Discussion: #1: Andreas Jaeger (a_jaeger) (2009-06-09 15:00:44) Why is it beneficial to change the version at all? Or should the default get changed? #2: Andreas Jaeger (a_jaeger) (2009-08-12 10:16:32) (reply to #1) Or why shouldn't we use a later metadata version number by default instead? #3: Arvin Schnell (aschnell) (2009-08-14 12:06:05) (reply to #2) AFAIR not all bootloaders can handle the latest raid superblock versions. #4: Per Jessen (pjessen) (2009-11-06 23:08:11) (reply to #2) The mdadm utility defaults to 0.90, and I think it would make sense to follow that rather than use a later version for no particularly beneficial reason - in particular when an explicity upgrade to >0.90 regresses other functionality. Bug 357897. #5: Jan Engelhardt (jengelh) (2009-11-07 01:43:42) (reply to #4) That would just mean that LILO has not been updated in *years*. Super1 support was added to mdadm over 4 years ago. Not even CentOS 5.x is reaches that age. The main benficial reason here is to span MDs over many disks, and set names/hosts/uuids so that arrays do not accidentally get assembled in another system. #6: Per Jessen (pjessen) (2009-11-07 11:00:03) (reply to #5) The most recent LILO version is 22.8 from February 2007. #8: Jan Engelhardt (jengelh) (2009-12-05 15:03:37) (reply to #4) mdadm now defaults to 1.1. #7: Per Jessen (pjessen) (2009-11-07 11:23:13) It's a case of "works with more than 28 devices" versus "works with lilo": 1) RAID array created with metadata version 0.90 -> it works with lilo, but will "only" support 28 devices. 2) RAID array created with metadata version >=1.0 -> it doesn't work with lilo, but supports more than 28 devices. Both situations are corner cases, and both are easily worked around by creating the array outside of YaST. -- openSUSE Feature: https://features.opensuse.org/306188