On Wed, Apr 20, 2016 at 6:33 AM, Weiner, Michael <weinerm@xxxxxxx> wrote: > PERC 700 controller that has a virtual drive configured as a RAID 5 with 15 disks in it. We're running CentOS 5.10 at the moment, and I created a 15Tb ext3 filesystem on that RAID group (set this up a few years back) that has been running fine up until yesterday. I had the opportunity to add another PERC H810 controller along with a PowerVault MD1200 to add more space (44Tb as XFS), but when we went to turn the server back on, we noticed one of the disks in the RAID group had apparently failed. I didn't think much of it at the time, as it was a RAID 5, but when the server came up and I tried to mount it, I received the following error: When in doubt go all the way back to the beginning! Do you know for certain these two controller versions support identical array metadata, and do identical array assembly? It's typical that this is not true. If you don't know for certain, ask support whether they are certain. If they merely say "should work" that's unconvincing. Next question is whether, for certain, a PER H810 controller can assemble a PERC 700 controller's array *degraded, and can rebuild a replacement device* correctly as if it were a PERC 700 controller. Chances are you're in an edge case. Only if they've tested this exact scenario can they say they're certain it will work. I'm willing to bet this whole problem is the RAID is not assembled correctly. This is one of the negatives of proprietary hardware RAID if they don't consistently use and support SNIA's DDF metadata format. Each model of controller, sometimes even the firmware version of a particular model, will only support specific metadata versions and often don't sanity check. It's crazy but I read about it all the time... -- Chris Murphy -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: http://lists.fedoraproject.org/admin/lists/users@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
