Hi Dave and all others who replied, I just realized I have not answered on list to thank you all for the analysis of his failure! On 10/25/17 23:29, Dave Chinner wrote: > > This is a pretty good indication that the RAID rebuild has > completely jumbled up the disks and the data on the disks during > the rebuild. *sigh* > It's a hardware raid controller that is having hardware problems > during a rebuild. I'd say your filesystem is completely screwed > because the rebuild went wrong and you have no way of knowing what > blocks are good and what aren't, nor even whether the RAID has been > assembled correctly after the failure. Hence even if you could mount > it, the data in the files is likely to be corrupt/incorrect > anyway... We will now replace these controllers with dumb SAS HBA and will try to keep the "raid" features at a different level (md+xfs and/or zfs) which hopefully will avoid this failure mode in the future. Until then, I think we are lucky as we do not have hot spares defined on these controllers as that would prohibit us to react properly and eliminate host I/O at a time of our choosing... Thanks a lot again! Cheers Carsten -- Dr. Carsten Aulbert, Max Planck Institute for Gravitational Physics, Callinstraße 38, 30167 Hannover, Germany Phone: +49 511 762 17185 -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
